JP4750618B2 - Detector and detection method - Google Patents

Description

  The present invention relates to a detector and a detection method, and more particularly, to a detector for detecting hexavalent chromium and a method for detecting hexavalent chromium.

  Conventionally, chromate treatment has been widely used for plating such as screws and sheet metal for the purpose of improving the corrosion resistance. In the past, hexavalent chromium was mainly used for chromate treatment. However, in order to improve safety, hexavalent chromate treatment tends to be regulated now. Valuation chromate treatment has begun to attract attention. Chromate-treated products are widely used at present, but it is considered that a method for determining the presence or absence of chromium, especially the presence or absence of hexavalent chromium, in the members and parts of various products will be required in the future.

  Conventionally, as a method for detecting hexavalent chromium such as parts, for example, parts that may contain hexavalent chromium are appropriately processed, and then processed by AES (Auger Electron Spectroscopy), SAM (Scanning Auger electron Microscopy), A method for evaluating using an analytical instrument such as XPS (X-ray Photoelectron Spectroscopy) is known. In addition to such a method, for example, the diphenylcarbazide method in which hexavalent chromium is eluted from a liquid such as a component and reacted with diphenylcarbazide to check the discoloration state (absorbance). Has been proposed (see Patent Documents 1, 2, and 3).

Conventionally, various detection methods have been proposed in various fields. For example, a method of simply measuring nitrite ion concentration using a nitrite ion detection paper (see Patent Document 4), moisture on one side of a water-permeable film. A method of detecting moisture using a moisture detection label provided with a coloring layer that develops color (see Patent Document 5), and a gas detector carrying a detection reagent that develops color on contact with a gas component on a film-like support A method of detecting gas using the method (see Patent Document 6) has been proposed.
JP 2005-274503 A JP 2003-172696 A Japanese Patent No. 3607888 JP-A-2005-76038 Japanese Patent Laid-Open No. 10-90244 Japanese Patent Laid-Open No. 9-210985

  When multiple parts are obtained at once, the presence or absence of hexavalent chromium can be known by using the attached quality data and analysis / evaluation such as sampling inspection. Can be guaranteed.

  However, there is a possibility that an already assembled product or an OEM (Original Equipment Manufacture) product supplied from another manufacturer contains a mixture of chromated parts and other parts. In order to know whether hexavalent chromium is used or not, it is necessary to disassemble the assembly and analyze and evaluate each disassembled part. In particular, when hexavalent chromium is detected using an analytical instrument, it is often necessary to disassemble the disassembled parts into a shape suitable for each analytical instrument. As described above, in order to obtain quality assurance data for hexavalent chromium such as an assembled product, a great amount of labor and time are required, and the accompanying increase in cost cannot be ignored.

  In addition, the trivalent chromate treated product, which is a substitute for the hexavalent chromate treated product, is difficult to distinguish from the hexavalent chromated treated product in appearance. The same problem arises because each must be analyzed and evaluated. Furthermore, at present, it is a transition period from the hexavalent chromate treatment to the trivalent chromate treatment, and hexavalent chromium may be mixed into the trivalent chromate film.

  This invention is made in view of such a point, and it aims at providing the detection body and detection method which can detect the hexavalent chromium which can be contained in components etc. easily and efficiently accurately. To do.

According to one aspect of the present invention , in a detection body used for detection of hexavalent chromium, an elution part for eluting hexavalent chromium from the detection object in contact with the detection object and the elution part are heated. a heating unit, said possess and eluted containing the substance to detect the hexavalent chromium reaction unit, the elution portion, the eluate, the a layered sensing object is provided with a surface contacting sensing member Is provided.

  According to such a detection object, the elution part that contacts the detection object is heated by the heating part, and hexavalent chromium is eluted from the detection object in the heated elution part and is eluted in the elution part. Hexavalent chromium is detected using a substance contained in the reaction part. Since the elution part is brought into contact with the detected object and the presence or absence of hexavalent chromium in the detected object is determined, hexavalent chromium can be easily detected. In addition, since hexavalent chromium is eluted by heating, the elution time of hexavalent chromium can be shortened compared to the case of not heating, and the efficiency of detection of hexavalent chromium can be improved. Furthermore, since the elution amount of hexavalent chromium can be increased by this heating, the detection sensitivity of hexavalent chromium can be improved.

Further , according to one aspect of the present invention, in the method for detecting hexavalent chromium, an elution part for eluting hexavalent chromium from the detected object in contact with the detected object, and heating for heating the elution part possess a part, and a reaction unit including a substance which detects the hexavalent chromium was eluted with the elution portion, the eluate is layered with a surface on which the sensing object is in contact, the detection body The elution part of the detection body is brought into contact with the detection object, the elution part in contact with the detection object is heated by the heating unit, and the detection object is determined by the presence or absence of discoloration in the reaction unit test knowledge there is provided a method you determine the presence or absence of hexavalent chromium.

  According to such a detection method, the elution portion of the detection body is brought into contact with the detection target body, the elution portion is heated by the heating portion, and hexavalent chromium is eluted. Whether or not there is. Since hexavalent chromium is eluted by heating, the efficiency of detection of hexavalent chromium and the improvement of detection sensitivity can be achieved.

  In the present invention, the detection body has an elution section for eluting the hexavalent chromium of the detected object, a heating section for heating the elution section, and a reaction section containing a substance for detecting the eluted hexavalent chromium. Made the configuration. As a result, it is possible to determine the presence or absence of hexavalent chromium in the detected object without disassembling or processing the detected object, and the detection of hexavalent chromium is performed easily, quickly, accurately and at low cost. be able to.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the detection body used for detection of hexavalent chromium and the principle of detection will be described.
FIG. 1 is a schematic sectional view of a detector.

  The detection body 1 includes an elution section 2 for eluting hexavalent chromium from an evaluation target that is an object to be detected, a heating section 3 for heating the elution section 2, and hexavalent chromium eluted in the elution section 2. It has the reaction part 4 for detecting. In FIG. 1, the structure which provided the heating part 3 in the side part of the elution part 2, and provided the reaction part 4 on these is illustrated. The detector 1 is formed, for example, in a planar circular or rectangular sheet shape, and the elution part 2 side is attached to the evaluation target, and all or a part of the elution part 2 is attached to the surface of the evaluation target. It can be in close contact.

  The elution part 2 contains water or a chemical solution (acetone, ethanol, etc.) for eluting hexavalent chromium from the evaluation object when it is in close contact with the surface of the evaluation object. The elution part 2 can hold water and chemical solution for elution of hexavalent chromium for a certain period of time, and does not fix hexavalent chromium eluted from the surface to be evaluated by such water or chemical solution. Consists of materials. For example, the elution part 2 can be made of a porous material such as cotton, mesh or filter, or a polymer having water retention.

  In addition, the water content of the water-retaining polymer can be controlled in advance by controlling the molecular weight and the like. If this is utilized, it is possible to control the amount of hexavalent chromium elution water or chemicals in the elution part 2. If the amount of water or chemical in the elution part 2 is controlled to be constant, the amount of liquid at the time of elution of hexavalent chromium can be made constant even if the evaluation object changes.

The heating unit 3 is configured so as to generate heat to heat the elution unit 2 or to efficiently transfer heat supplied from the outside of the detection body 1 to the elution unit 2.
Here, in the case where the heating unit 3 itself generates heat, the heating unit 3 contains, for example, a substance that generates heat in contact with air or water. Examples of such substances include iron (Fe) that generates heat by reacting with oxygen in the air, and calcium oxide (CaO) and sulfur trioxide (SO ₃ ) that generate heat by a hydration reaction. . As a medium containing such a substance, for example, a porous material such as a mesh or a filter can be used.

  The heating unit 3 may be configured to generate heat by applying a voltage, for example, a heating wire, a Peltier element, or the like, and a voltage may be applied thereto to heat the elution unit 2. The heating wire can be embedded, for example, in a ceramic or resin, or can be embedded in a metal with appropriate sealing. The Peltier element can be configured by laminating two kinds of metals having predetermined properties.

In the case where the heating unit 3 is configured to transfer heat outside the detection body 1 to the elution unit 2, the heating unit 3 is configured using a material having good thermal conductivity. Examples of such materials include metals such as copper (Cu), aluminum (Al), and Fe, ceramics such as aluminum nitride (AlN) and aluminum oxide (Al ₂ O ₃ ), and heat transfer materials such as heat conduction films. Examples include mixed materials.

  The reaction part 4 contains a substance (color changing agent) that changes color (including color development, the same applies hereinafter) by reacting with hexavalent chromium, for example, diphenylcarbazide. For example, the reaction part 4 can be constituted by containing diphenylcarbazide or the like in the resin. In addition, the resin used for the reaction part 4 needs to have properties such as being able to identify the color change when hexavalent chromium reacts with the color change agent, and not reacting with hexavalent chromium or the color change agent. .

  In the detector 1 having such a configuration, the eluted hexavalent chromium moves through the elution part 2 through water or a chemical solution to reach the reaction part 4, and the discoloring agent contained in the reaction part 4 When the reaction occurs, the reaction unit 4 changes color.

  The planar size of the detection body 1 can be arbitrarily set according to the evaluation target. For example, when used for a screw, the size of the detector 1 is a size that can be affixed to the screw head, or used for a larger plate or the like. For example, the size may be set according to the size. Moreover, although the thickness of the detection body 1 can also be set arbitrarily, in consideration of the elution amount of hexavalent chromium and the like, it is desirable to appropriately set the thickness, particularly the elution portion 2.

  In addition, although the detection body 1 of the structure illustrated in FIG. 1 depends on the material, for example, a heating unit 3 having a through hole at the center is prepared, and the reaction unit 4 is formed in a sheet shape at one end of the through hole. And the elution part 2 is formed in the hole from the other end side.

  FIG. 2 to FIG. 4 are diagrams for explaining the flow of the hexavalent chromium detection method using the detection body. FIG. 2 is a schematic cross-sectional view when the detection body is attached, and FIG. 3 is a schematic cross-section when hexavalent chromium is eluted. FIG. 4 and FIG. 4 are schematic cross-sectional views when the reaction part is discolored.

For example, it is assumed that the evaluation object 5 has a hexavalent chromate film 7 formed on the surface of a base layer 6 that is a base layer or a plating layer.
When performing detection using the detector 1, first, as shown in FIG. 2, the detector 1 is placed on the surface of such an evaluation object 5, in this case, on the hexavalent chromate film 7, and the elution portion 2 is provided. Paste it in close contact. The elution part 2 contains water or a chemical solution in advance before the detector 1 is attached, or contains water or a chemical solution by dropping or impregnating water or a chemical solution just before the detector 1 is attached. I will let you.

When the detector 1 is affixed to the hexavalent chromate film 7, hexavalent chromium is eluted from the hexavalent chromate film 7 by water or chemicals in the elution part 2 as shown in FIG. Furthermore, the elution part 2 is heated by the heating part 3 in a state where the detector 1 is adhered to the hexavalent chromate film 7 in this way. The heating method varies depending on the configuration of the heating unit 3. For example, when the heating unit 3 includes Fe, CaO, SO _3, etc. and generates heat by contact with air or water, the detector 1 attached to the hexavalent chromate film 7 The heating unit 3 is brought into heat by bringing the heating unit 3 into contact with air or supplying water to the heating unit 3 (supplied from the outside or from water or a chemical solution in the elution unit 2). The elution part 2 is heated.

  Further, for example, when the heating unit 3 is configured to generate heat by applying a voltage to the heating wire or a Peltier element, the heating unit 3 is attached to the hexavalent chromate film 7 and then the heating unit 3 is heated. A predetermined voltage is applied to 3 to heat the heating part 3 and heat the elution part 2.

  Further, for example, when the heating unit 3 is made of a highly heat conductive material such as metal, ceramic, or a heat transfer substance mixed material and heat is transferred from the outside of the detection body 1 to the elution section 2, the detection body After 1 is affixed to the hexavalent chromate film 7, such a heating unit 3 is heated using a soldering iron or a dryer, and the heat is transferred to the elution unit 2 to heat the elution unit 2.

  Usually, the elution of hexavalent chromium from the hexavalent chromate film 7 is larger when the water or chemical in the elution part 2 is at a higher temperature than when it is at a lower temperature. A certain amount of elution is performed in a shorter time. As described above, when the elution part 2 is heated by a method according to the form of the heating part 3, the temperature of the water or the chemical solution in the elution part 2 rises, so that the hexavalent chromate film 7 shown in FIG. The elution of hexavalent chromium is promoted. Therefore, the elution of hexavalent chromium from the hexavalent chromate film 7 when the elution part 2 is heated by the heating part 3 is greater than that when the elution part 2 is not heated by the heating part 3, and Will be done in a shorter time.

  The heating of the elution part 2 by the heating part 3 can provide a certain effect as long as the water and chemicals in the elution part 2 are higher than when heating is not performed. However, when setting the heating temperature, the elution part 2 is heated. And the heat resistance of the reaction part 4 is also taken into consideration. The heating temperature is about 80 ° C., preferably about 60 ° C. to 80 ° C. at a temperature higher than normal temperature.

For convenience, FIG. 3 shows a region in which the hexavalent chromium in the elution portion 2 is eluted in a layered manner.
After the detector 1 is attached to the hexavalent chromate film 7, a certain period of time has passed. As shown in FIG. 4, when the eluted hexavalent chromium moves through the elution part 2 and reaches the reaction part 4, The valence chromium reacts with the color change agent in the reaction part 4 so that the reaction part 4 changes color. The presence of hexavalent chromium can be detected by this discoloration.

  Here, the evaluation object 5 having the hexavalent chromate film 7 is taken as an example. However, when the same condition is applied to an evaluation object that does not contain hexavalent chromium, the reaction section 4 normally does not change color. Therefore, it can be known that the evaluation object does not contain hexavalent chromium.

Here, the discoloration of the reaction unit 4 is determined by visual observation, but can also be determined using a spectrophotometer if necessary.
As described above, by using the detection body 1 as described above, the detection body 1 is affixed to the evaluation object 5 without disassembling or processing the evaluation object 5 and hexavalent chromium in the film. Therefore, it is possible to easily detect hexavalent chromium. Furthermore, by heating the hexavalent chromium elution water and chemicals contained in the sensing element 1 attached to the evaluation object 5, the elution amount for a certain time is increased as compared with the case where such heating is not performed. In addition, since a certain amount of elution is performed in a short time, hexavalent chromium can be detected quickly and with high sensitivity.

  Trivalent chromium is less likely to elute in water or the like than hexavalent chromium. Therefore, if the detector 1 is attached to the surface of a film that is a trivalent chromate film, it is possible to determine whether or not hexavalent chromium is mixed in the film. Further, the diphenylcarbazide solution changes color by reacting with zinc plating in addition to hexavalent chromium. For this reason, in the trivalent chromate film in which structural defects due to cracks, peeling, etc. exist, a discoloration reaction between the diphenylcarbazide solution and galvanization occurs in the detection body 1, and thus the detection body 1 is made to be a trivalent chromate film. It is also possible to use it for the determination of quality.

  In the above description, the detection body 1 in which the layered elution part 2 and the heating part 3 and the layered reaction part 4 are laminated is illustrated, but each part does not necessarily have to be clearly divided. It is possible to have a structure having both functions of the elution part 2 and the heating part 3 in one layer and a structure having all the functions of the elution part 2, the heating part 3 and the reaction part 4 in one layer. It is.

Hereinafter, a configuration example of the detection body will be described.
FIG. 5 is a schematic cross-sectional view of a first configuration example of the detector.
In the detection body 10 shown in FIG. 5, the side surface of the laminate of the elution portion 11 and the reaction portion 12 and the upper surface of the reaction portion 12 are covered with a heat-resistant / translucent film 13, and the heating portion 14 is provided on the side portion of the structure. It has the structure which was made. At the time of detection, the surface of the elution portion 11 that is not covered with the heat-resistant / light-transmitting film 13 is attached to the evaluation target.

Here, the elution part 11, the reaction part 12, and the heating part 14 can be configured as the elution part 2, the reaction part 4 and the heating part 3 of the detector 1 shown in FIG.
That is, the elution part 11 is configured to contain hexavalent chromium elution water or a chemical solution. The material of the elution part 11 can hold water and chemical solution for elution of hexavalent chromium for a certain period of time when water and chemical solution for elution of hexavalent chromium are contained therein. As long as it does not react with chemicals and does not fix the eluted hexavalent chromium, there is no particular limitation. For example, the elution part 11 can be made of a porous material such as a mesh or a filter.

  The reaction portion 12 contains a color changing agent that changes color by reacting with hexavalent chromium. Such a reaction part 12 is configured by, for example, containing diphenylcarbazide or the like as a color changing agent in a resin.

  The heat-resistant / light-transmitting film 13 serves to protect the reaction part 12 from the outside and prevent evaporation of hexavalent chromium elution water and chemicals in the elution part 11. The heat-resistant / light-transmitting film 13 is preferably colorless and transparent so that when the hexavalent chromium is detected, the discoloration of the reaction part 12 can be easily confirmed. For example, the material is polyethylene terephthalate (Poly Ethylene Terephthalate). , PET) or the like.

  In addition, the heating unit 14 is configured as described for the detection body 1 so that the heating unit 14 generates heat and heats the water and the chemical solution in the elution unit 11 through the heat-resistant and translucent film 13, or Heat supplied from the outside of the detection body 10 can be transferred to water or a chemical solution in the elution part 11 through the heat-resistant / light-transmitting film 13.

When hexavalent chromium is detected using such a detection body 10, first, water and a chemical solution are included in the elution portion 11 before the detection body 10 is attached to an evaluation target.
At that time, when the heating unit 14 is configured to generate heat by contact with water, the heating unit 14 also contains water or a chemical solution together with the elution unit 11. In this case, for example, water or a chemical solution may be dropped from the attachment surface side of the detection body 10 to the elution portion 11 and the heating portion 14, or the elution portion 11 and the heating portion 14 on the attachment surface may be added to the water or the chemical solution. Or impregnation. Thereby, heating of the water and chemical | medical solution in the elution part 11 by the heating part 14 will be started.

  In addition, when the heating unit 14 is configured to generate heat by contact with air, for example, the outer surface of the heating unit 14 is covered with a hermetic seal (not shown), and after the detector 10 is attached. Just before the start of detection, the sealing seal may be peeled off so that the heating unit 14 is brought into contact with air. Thereby, heating of the water and chemical | medical solution in the elution part 11 by the heating part 14 will be started.

  Moreover, when it is set as the structure which heats the heating part 14 by the voltage application to a heating wire etc., or when it is set as the structure which transfers the heat supplied from the detection body 10 exterior, the sticking surface side of the detection body 10 The elution part 11 may be selectively dropped with water or a chemical solution, or the pasting surface may be impregnated with water or a chemical solution. And the heating of the water and the chemical | medical solution of the elution part 11 by the heating part 14 will be started by performing predetermined voltage application or heat supply to the heating part 14. FIG.

  In addition, the elution part 11 is preliminarily made to contain water or a chemical solution, and the pasting surface is covered with a hermetic seal (not shown), and the hermetic seal is peeled off at the detection stage, and then the sensing body 10 is removed. You may make it stick on the surface of evaluation object. In the case of such a configuration, an operation such as dropping water or a chemical solution onto the elution portion 11 before the detection body 10 is attached becomes unnecessary.

  The detection body 10 in which water or a chemical solution is contained in the elution part 11 or the like is attached to the surface of the evaluation object by the surface tension of the water or the chemical solution. Alternatively, an adhesive layer (not shown) may be provided on the attachment surface side of the heating unit 14, and the detection body 10 may be attached to the surface of the evaluation target using the adhesive layer.

  In the detection body 10 affixed to the surface to be evaluated, the elution part 11 is heated by the heating part 14 and the temperature of the water and the chemical solution in the elution part 11 rises. When a film containing hexavalent chromium is formed on the surface to be evaluated, the hexavalent chromium is eluted from the film by the heated water or chemical solution, and reaches the reaction section 12 and reaches a predetermined level. When the reaction occurs, the reaction part 12 changes color. On the other hand, when the film containing hexavalent chromium is not formed on the surface to be evaluated, the reaction part 12 does not normally change color.

  In this way, by heating the water or chemical solution for elution of hexavalent chromium, when hexavalent chromium is present on the surface of the evaluation object, a certain amount can be efficiently eluted, thereby Hexavalent chromium can be detected quickly and with high sensitivity.

FIG. 6 is a schematic cross-sectional view of a second configuration example of the detector. However, in FIG. 6, the same elements as those shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof is omitted.
The detection body 20 shown in FIG. 6 is different from the detection body 10 shown in FIG. 5 in that it has a single-layer elution / reaction portion 21. At the time of detection, the surface of the elution / reaction unit 21 that is not covered with the heat-resistant / light-transmitting film 13 is attached to the evaluation target.

  The elution / reaction unit 21 can contain water and chemicals for elution of hexavalent chromium, and has a structure containing a color changing agent that reacts with hexavalent chromium and changes color. For example, the elution / reaction unit 21 may be made of a porous material such as a mesh or a filter, a water-retaining polymer, or the like, and may contain water, a chemical solution, or a color change agent.

  Even in the case of detecting hexavalent chromium using such a detector 20, like the detector 10 shown in FIG. 5, the elution / reaction part 21 is made to be hexavalent before being attached to the evaluation object. Make sure to contain water and chemicals for elution of chromium. Then, by using the surface tension of the water or chemical solution, the detection body 20 is attached to the surface of the evaluation target, the temperature of the water or chemical solution in the elution / reaction unit 21 is raised by the heating unit 14, and the elution / reaction unit 21. From the discoloration state, the presence or absence of the hexavalent chromium to be evaluated is determined.

FIG. 7 is a schematic cross-sectional view of a third configuration example of the detector. However, in FIG. 7, the same elements as those shown in FIG. 6 are denoted by the same reference numerals, and detailed description thereof is omitted.
The detection body 30 shown in FIG. 7 is provided with a heating unit 14 on the side of the elution / reaction unit 21, and the upper surface of the elution / reaction unit 21 and the upper surface of the heating unit 14 are covered with a heat-resistant / translucent film 31. This is different from the detection body 20 shown in FIG.

  The heat-resistant / translucent film 31 is made of a colorless and transparent material such as PET, protects the elution / reaction unit 21 and the heating unit 14 from the outside, and contains water for elution of hexavalent chromium in the elution unit 11. Prevent evaporation of chemicals. Even when such a detector 30 is used, hexavalent chromium can be detected in the same manner as the detector 20 shown in FIG.

FIG. 8 is a schematic cross-sectional view of a fourth configuration example of the detector.
The detector 40 shown in FIG. 8 has a single-layer elution / heating unit 41, and a reaction unit 42 containing a color change agent such as diphenylcarbazide is provided on the upper layer.

The elution / heating unit 41 is configured using, for example, a porous mesh, a water-retaining polymer, or the like, and has a structure in which a heating material for heating hexavalent chromium elution water or a chemical solution is embedded. have. For the mesh or polymer used for the elution / heating unit 41, a material that does not react with water or chemicals for elution of hexavalent chromium and a heating material and does not fix the eluted hexavalent chromium is selected. . As the heat generating material for heating the water and chemical solution in the elution / heating unit 41, a material that generates heat upon contact with water such as CaO, SO ₃ or the like is used.

  When hexavalent chromium is detected using such a detection body 40, for example, before the detection body 40 is attached to an evaluation object, water is added to the elution / heating unit 41 by a method such as dropping or impregnation. Or chemicals. And the detection body 40 is affixed on the surface of evaluation object so that the elution / heating part 41 may closely_contact | adhere. The exothermic material in the elution / heating unit 41 comes into contact with water or a chemical solution dropped on the elution / heating unit 41 to generate heat, and thereby the temperature of the water or the chemical solution rises.

  When hexavalent chromium is contained in the evaluation target, the hexavalent chromium is eluted in the heated water or chemical solution in the elution / heating unit 41, and when the eluted hexavalent chromium reaches the reaction unit 42, Reacts with the color changing agent in the reaction section 42, and the reaction section 42 changes color. Thus, the presence or absence of the hexavalent chromium to be evaluated is determined from the color change state of the reaction unit 42.

  8 illustrates the laminated structure of the elution / heating unit 41 and the reaction unit 42. On such a structure, elution / heating is performed for protection from the outside and prevention of evaporation of water and chemicals. A heat-resistant / translucent film such as PET may be formed so as to cover the portion 41 (excluding the attachment surface) and the reaction portion 42.

FIG. 9 is a schematic cross-sectional view of a fifth configuration example of the detector.
The detector 50 shown in FIG. 9 has a single-layer structure, and water or a chemical solution for elution of hexavalent chromium can be contained in the layer. Further, the detector 50 has a structure in which a heating material for heating the water or chemical solution and a color changing agent such as diphenylcarbazide are contained in the layer. As the heat generating material, a material that generates heat upon contact with water such as CaO or SO ₃ is used.

  For example, a porous mesh or a water-retaining polymer can be used for such a detector 50, and such a medium contains a heat generating material and a color change agent. For the mesh, polymer, etc., a material that does not react with water or a chemical solution for elution of hexavalent chromium, a heat generating material, and a discoloring agent and does not fix the eluted hexavalent chromium is selected.

  When hexavalent chromium is detected using such a detector 50, for example, before the detector 50 is affixed to an evaluation target, water or a chemical solution is contained by a method such as dripping or impregnation. Then, it is pasted on the surface of the evaluation object. When the detection body 50 is affixed to the surface to be evaluated, for example, the heating material contained in the detector 50 comes into contact with the water or the chemical contained in the same, so that the temperature of the water or the chemical rises.

  When hexavalent chromium is contained in the evaluation target, the hexavalent chromium is eluted in the heated water or chemical solution, the eluted hexavalent chromium reacts with the color change agent, and the detector 50 is discolored. Thus, the presence or absence of the hexavalent chromium to be evaluated is determined from the discoloration state of the detection body 50.

  In addition, although this FIG. 9 illustrated the single layer structure provided with each function of elution, a heating, and reaction (discoloration), it is PET so that on such a structure (except for a bonding surface) may be coat | covered. You may form heat-resistant and translucent films, such as.

FIG. 10 is a schematic cross-sectional view of a sixth configuration example of the detector.
The detector 60 shown in FIG. 10 has a laminate of an elution part 61 and a reaction part 62, and generates heat in the elution part 61 as a heating part in contact with water such as CaO and SO _3. A microcapsule 63 containing the material is embedded. The microcapsule 63 releases the heat generating material inside when the capsule wall is broken by an external force, or the heat generating material inside is released by dissolving the capsule wall in contact with water or the like. Various forms such as those can be used. The elution part 61 and the reaction part 62 can each be configured like the elution part 2 and the reaction part 4 of the detector 1 shown in FIG.

  In addition, in the part excluding the microcapsule 63 of the elution part 61, water or chemical solution for elution of hexavalent chromium can be held for a certain period of time as a material, and it reacts with water or chemical solution for elution of hexavalent chromium. In addition, the one that does not fix the eluted hexavalent chromium and can embed the microcapsule 63 inside is used. For example, a mesh or a water retaining polymer can be used.

  When hexavalent chromium is detected using such a detection body 60, first, before the detection body 60 is attached to an evaluation target, the capsule wall of the microcapsule 63 is destroyed and dropped or impregnated. Then, the elution part 61 is made to contain water or a chemical solution. Alternatively, before the detector 60 is attached to the evaluation target, water or a chemical solution is contained in the elution portion 61 by a method such as dropping or impregnation, and the capsule wall of the microcapsule 63 is dissolved with the water or the chemical solution. Then, the detection body 60 is affixed on the surface of evaluation object so that the elution part 61 closely_contact | adheres.

  The water and the chemical solution in the elution part 61 are brought into contact with the heat generating material released from the microcapsule 63 and the temperature rises. When hexavalent chromium is contained in the evaluation target, hexavalent chromium is eluted in the heated water or chemical solution, and when the eluted hexavalent chromium reaches the reaction part 62, the hexavalent chromium and the color changing agent The reaction part 62 changes color due to the reaction. Thus, the presence or absence of the hexavalent chromium to be evaluated is determined from the color change state of the reaction unit 62.

  FIG. 10 illustrates a laminated structure of the elution part 61 including the microcapsule 63 and the reaction part 62. However, on this structure, the elution part 61 (excluding the pasting surface) and the reaction part 62 are illustrated. A heat-resistant / light-transmitting film such as PET may be formed so as to cover the film.

FIG. 11 is a schematic cross-sectional view of a seventh configuration example of the detector. However, in FIG. 11, the same elements as those shown in FIG. 10 are denoted by the same reference numerals, and detailed description thereof is omitted.
The detector 70 shown in FIG. 11 has a single layer structure, and the elution part 61 contains water and chemicals for elution of hexavalent chromium. Further, the detector 70 has a configuration in which a microcapsule 71 that functions as a heating unit and a microcapsule 72 that functions as a reaction unit are embedded in the elution unit 61.

A microcapsule 71 serving as a heating unit contains a material that generates heat when in contact with water such as CaO or SO ₃ . In addition, the microcapsule 72 serving as a reaction part contains a color changing agent such as diphenylcarbazide. In these microcapsules 71 and 72, when the capsule wall is broken by an external force, the heat generating material or the color change agent therein is released, or when the capsule wall is dissolved by contact with water or the like, Various forms such as those from which the heat generating material and the color changing agent are released can be used.

  In addition, in the part except the microcapsules 71 and 72 of the elution part 61, water and chemicals for elution of hexavalent chromium can be held as a material for a certain period of time. In which the eluted hexavalent chromium is not fixed, and in which the microcapsules 71 and 72 can be embedded is used. For example, a mesh or a water retaining polymer can be used.

  When hexavalent chromium is detected using such a detection body 70, first, the capsule walls of the microcapsules 71 and 72 are destroyed and dropped or impregnated before the detection body 70 is attached to an evaluation target. The elution part 61 is made to contain water and a chemical | medical solution by the method of this. Alternatively, before the detector 70 is attached to the evaluation target, water or a chemical solution is contained in the elution portion 61 by a method such as dripping or impregnation, and the capsule walls of the microcapsules 71 and 72 are dissolved with the water or the chemical solution.

  The water or the chemical solution contained in the detector 70 is brought into contact with the heat generating material released from the microcapsule 71 and is heated. When hexavalent chromium is contained in the evaluation target, the hexavalent chromium is eluted in the heated water or chemical solution, and the eluted hexavalent chromium reacts with the discoloring agent released from the microcapsule 72, The detection body 70 changes color. Thus, the presence or absence of the hexavalent chromium to be evaluated is determined from the discoloration state of the detection body 70.

  FIG. 11 illustrates a single-layer structure detector 70 including microcapsules 71 and 72. However, heat resistance such as PET is applied to cover such a structure (excluding the attachment surface). -You may form a translucent film.

12A and 12B are diagrams illustrating an eighth configuration example of the detector, in which FIG. 12A is a schematic plan view and FIG. 12B is a schematic cross-sectional view taken along the line CC in FIG. FIG. 13 is a schematic cross-sectional view of a modified example of the detector.
The detector 80 shown in FIG. 12 has a configuration in which a heating unit 83 using a heat transfer material such as a metal, a ceramic, or a heat transfer material mixed material is provided on the side of the laminate of the elution unit 81 and the reaction unit 82. And an adhesive layer 84 is provided on the attachment surface side of the heating unit 83. For the adhesive layer 84, for example, PVA (Poly Vinyl Alcohol) widely used as an adhesive can be used. Further, in the detection body 80, the heating portion 83 is provided with a protruding portion 83a that extends partially to the side, and a recess 83b is formed at the tip of the protruding portion 83a. In addition, the elution part 81 and the reaction part 82 can each be made into the structure like the elution part 2 and the reaction part 4 of the detection body 1 shown in FIG.

  When hexavalent chromium is detected using such a detector 80, the detector 81 is covered with the adhesive layer 84 after the elution portion 81 is in a state containing water or chemical solution for elution of hexavalent chromium. The heating unit 83 is heated by pressing the tip of a heating tool such as a soldering iron attached to the surface to be evaluated and heated in the recess 83b. Since the recess 83b is formed in the heating part 83, it is difficult for the position of the tip of the heating tool to shift, and a situation where the heating tool hits the evaluation target and damages the surface thereof can be avoided. In addition to such a soldering iron as a heating tool, a dryer or the like may be used to heat the heating unit 83 by blowing warm air.

  In this way, the heating unit 83 is heated, the temperature of the water or chemical in the elution unit 81 is increased, and the presence or absence of the hexavalent chromium to be evaluated is determined from the color change state of the reaction unit 82. According to such a detector 80, heat can be easily supplied from the outside to a heat transfer material such as metal or ceramic, and hexavalent chromium can be detected quickly and with high sensitivity.

  The heating unit 83 of the detection body 80 is heated by heat transfer using an appropriate heating tool as described above. For example, as shown in FIG. 13, a heating wire 85 is embedded inside the heating unit 83, A configuration in which the heating unit 83 can generate heat by voltage application is also possible. With such a configuration, at the detection stage, water or chemical solution in the elution unit 81 is heated by external heat supply, or water or chemical solution in the elution unit 81 is applied by applying voltage to the heating wire 85. It becomes possible to select whether to heat.

  14A and 14B are diagrams showing a ninth configuration example of the detector, in which FIG. 14A is a schematic plan view and FIG. 14B is a schematic side view. However, in FIG. 14, the same elements as those shown in FIG. 12 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The detection body 90 shown in FIG. 14 has a configuration in which a heating section 91 made of a Peltier element is provided on the side of the laminate of the elution section 81 and the reaction section 82, and thus the detection body 80 and Is different. The Peltier element of the heating unit 91 is configured by using two types of metals 91a and 91b having predetermined properties, and when a predetermined current is passed through the junction, the metal 91a is changed to the other metal 91b. Heat transfer occurs. The metal 91a, 91b constituting the Peltier element is provided with projecting portions 91c, 91d extending sideways, and depressions 91e, 91f are formed at the tip portions of these projecting portions 91c, 91d, respectively. ing.

  When hexavalent chromium is detected using such a detector 90, the detector 90 is covered with the adhesive layer 84 after the elution portion 81 is in a state containing water or chemical solution for elution of hexavalent chromium. Affixed to the surface of the object to be evaluated, the portions of the recesses 91e and 91f are used as terminals, a predetermined current is passed through the joints of the metals 91a and 91b, and the elution part 81 from the metal 91b to the other metal 91b. Heat transfer to the water and chemicals inside.

  15A and 15B are diagrams showing a tenth configuration example of the detector, in which FIG. 15A is a schematic plan view, and FIG. 15B is a schematic cross-sectional view taken along the line DD in FIG. However, in FIG. 15, the same elements as those shown in FIG. 12 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The detection body 100 shown in FIG. 15 is different from the above-described detection body 80 in that the thermo label 101 is attached to the upper part of the heating unit 83. The thermo label 101 functions as a temperature detection unit for detecting the temperature of the heating unit 83 and the elution unit 81 in the detection body 100.

  By attaching the thermo label 101 in this manner, the temperature or temperature history of the heating unit 83 and the elution unit 81 can be grasped, and the temperature control and overheating prevention of the detection body 100 attached to the evaluation target can be performed. For example, based on the color of the thermo label 101, it is possible to perform a process of peeling the detection body 100 from the evaluation target when the temperature reaches or reaches a predetermined elution temperature. In addition, when heating the heating unit 83 using a heating tool such as a soldering iron, the heating tool is pressed against the recess 83b and heated to a predetermined elution temperature. Based on the color of the thermo label 101, a predetermined value is used. When the elution temperature reaches or near the elution temperature, it is possible to perform a process such as separating the heating tool from the recess 83b. Thus, by using the thermo label 101, it becomes possible to detect hexavalent chromium with higher accuracy.

The thermo label 101 used for the detection body 100 can be similarly applied to those shown in the first to seventh configuration examples in addition to the detection body 1 shown in FIG. .
16A and 16B are diagrams illustrating an eleventh configuration example of the detection body, in which FIG. 16A is a schematic plan view and FIG. 16B is a schematic cross-sectional view taken along line EE of FIG. However, in FIG. 16, the same elements as those shown in FIG. 12 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The detection body 110 shown in FIG. 16 is different from the above-described detection body 80 in that the reference color label 111 is attached in the vicinity of the reaction portion 82. The reference color label 111 is used as a color determination unit for determining the color of the reaction unit 82 in the detection body 110.

  The reference color label 111 is composed of one or a plurality of labels of appropriate colors selected based on the relationship between the color change state of the reaction unit 82 and the elution amount of hexavalent chromium obtained in advance. When hexavalent chromium is detected by the detector 110, the presence or absence of hexavalent chromium and the amount of elution can be estimated by comparing the color of the reaction part 82 with the color of the reference color label 111 attached in the vicinity thereof. become.

The reference color label 111 used for the detection body 110 can be similarly applied to those shown in the first to seventh configuration examples in addition to the detection body 1 shown in FIG. is there.
FIGS. 17A and 17B are diagrams showing a twelfth configuration example of the detector, in which FIG. 17A is a schematic plan view, and FIG. 17B is a schematic cross-sectional view taken along line FF in FIG. However, in FIG. 17, the same elements as those shown in FIG. 12 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the detection body 120 shown in FIG. 17, a laminate of the elution part 81 and the reaction part 82 is covered with a heat-resistant / light-transmitting film 121, and a heating part 83 and an adhesive layer 84 are provided outside the heat-resistant / light-transmitting film 121. This is different from the above-described detection body 80.

  Thus, by covering the elution part 81 and the reaction part 82 with the heat-resistant / translucent film 121, protection from the outside and prevention of evaporation of water and chemicals in the elution part 81 are possible. Further, the heating unit 83 is wetted with water or a chemical solution by isolating the elution unit 81 containing water or a chemical solution between the heating unit 83 and the reaction unit 82 and the heating unit 83 with a heat-resistant / translucent film 121. It becomes possible to make the handling easy.

Furthermore, the thermo label 101 and the reference color label 111 shown in FIGS. 15 and 16 may be provided on the detection body 120.
18A and 18B are diagrams showing a thirteenth configuration example of the detector, in which FIG. 18A is a schematic plan view, and FIG. 18B is a schematic GG cross section of FIG. FIG. 19 and FIG. 20 are explanatory diagrams of a method for attaching the detector of the thirteenth configuration example. FIGS. 19A and 19B are diagrams showing a first step of the detection object attaching method, in which FIG. 19A is a schematic plan view, and FIG. 19B is a schematic HH cross-sectional view of FIG. FIGS. 20A and 20B are diagrams showing a second step of the detection object attaching method, in which FIG. 20A is a schematic plan view and FIG. 20B is a schematic cross-sectional view taken along the line II of FIG.

  In the detector 130 shown in FIG. 18, a laminate of the elution part 131 and the reaction part 132 is covered with a heat-resistant / light-transmitting film 133 such as PET, and a heating part 134 is provided outside the heat-resistant / light-transmitting film 133. ing. Furthermore, an adhesive layer 135 such as PVA is provided on the surface of the heat-resistant / translucent film 133 to which the detector 130 is attached. The detector 130 is covered with a sealing seal 136a on the surface of the detector 130 before use, and is also covered with a sealing seal 136b on the surface opposite to the surface of the detector 130. The two sealing seals 136a and 136b are bonded to each other before the detector 130 is used. In addition, the elution part 131, the reaction part 132, and the heating part 134 can each be configured as the elution part 2, the reaction part 4 and the heating part 3 of the detector 1 shown in FIG.

  In the case of detecting hexavalent chromium using such a detector 130, first, the sealing seal 136a covering the attachment surface side is peeled off. When the elution part 131 already contains water or chemical solution for elution of hexavalent chromium, if it is not contained, it is dropped, and after adding water or chemical solution by dropping or the like, FIG. As shown, it is affixed to the surface of the evaluation object 5 on which the hexavalent chromate film 7 is formed on the underlayer 6.

  Thereafter, as shown in FIG. 20, the sealing seal 136b on the side opposite to the attachment surface is also peeled off. For example, when the heating unit 134 is configured to generate heat by reacting with oxygen, the reaction starts when the hermetic seal 136b is peeled off, and the water and the chemical solution in the elution unit 131 are heated. . In addition, when the heating unit 134 is configured to generate heat by reacting with water, after the sealing seal 136b is peeled off, the reaction is started by dropping water on the heating unit 134, etc. Heat the chemicals. When the heating unit 134 is configured to generate heat by voltage application or to be heated by heat supply from the outside of the detection body 130, a predetermined voltage application or heat supply is performed to the heating unit 134 after the sealing seal 136b is peeled off. What should I do?

  By setting it as such a structure, the portability and preservation | save property of the detection body 130 can be improved. Moreover, by using such a detector 130, hexavalent chromium can be detected quickly and with high sensitivity.

Further, the thermo label 101 and the reference color label 111 shown in FIGS. 15 and 16 may be provided on the detection body 130.
Further, the sealing seals 136a and 136b used for the detection body 130 can be similarly applied to those shown in the first to twelfth configuration examples in addition to the detection body 1 shown in FIG. Thus, it is possible to obtain the same operation and effect by the same usage method as that described for the detection body 130.

21A and 21B are diagrams showing a fourteenth configuration example of the detection body, in which FIG. 21A is a schematic plan view, and FIG. 21B is a schematic cross-sectional view taken along line JJ in FIG.
A detection body 140 shown in FIG. 21 has a laminated body of an elution part 141 and a reaction part 142, a heating part 143, and an adhesive layer 144 such as PVA. A heat-resistant / light-transmitting film 145 such as PET is continuously provided so as to cover the laminate of the elution part 141 and the reaction part 142 and the heating part 143, respectively. Further, the heat-resistant / translucent film 145 is continuously formed on the plurality of detectors 140. Then, the surface of the plurality of detection bodies 140 connected in this way are attached to the evaluation object and the opposite surface side thereof is covered with the sealing seals 146a and 146b in the same manner as the detection body 130 shown in FIG. Has been. In addition, the elution part 141, the reaction part 142, and the heating part 143 can each be configured as the elution part 2, the reaction part 4 and the heating part 3 of the detector 1 shown in FIG.

  In the case of such a configuration, a cutout portion 147 (indicated by a chain line in the figure) between the detection bodies 140, for example, perforations, is formed, and the individual detection bodies 140 are cut out to detect hexavalent chromium. To be able to use. Note that the cutout portion 147 may have a configuration in which a space that can be cut using scissors, a cutter, or the like is secured between the detection bodies 140 in addition to the perforations.

  After the detection body 140 is cut off by the cut-out portion 147, the sealing body 146a on the affixing surface side is peeled off and evaluated in the same manner as shown in FIGS. 19 and 20 for the detection body 130 shown in FIG. Affix to the object, and then peel off the other hermetic seal 146b and start detecting hexavalent chromium.

  By adopting such a configuration, when detecting hexavalent chromium, a necessary number of detection bodies 140 can be cut out and used, and the portability and storage stability of the plurality of detection bodies 140 can be ensured. Can do. Moreover, by using such a detector 140, hexavalent chromium can be detected quickly and with high sensitivity.

Further, the thermo label 101 and the reference color label 111 shown in FIGS. 15 and 16 may be provided on the detection body 140.
Further, the principle of the configuration in which a plurality of objects are continuously formed so as to be cut out like the detection body 140 is shown in the above first to thirteenth configuration examples in addition to the detection body 1 shown in FIG. It is possible to apply to the same thing, and it is possible to obtain the same operation and effect.

Then, the specific example which implemented the detection of hexavalent chromium is demonstrated.
First, the first embodiment will be described.
Here, a trivalent chromate film and a hexavalent chromate film formed on the galvanized layer on the iron base layer were used as samples to be evaluated. The thickness of the iron base layer is about 2 mm, the thickness of the galvanized layer is about 7 μm, and the thickness of each of the trivalent chromate film and the hexavalent chromate film is about 500 nm.

Each of these samples was heated to about 80 ° C., and a flat circular cotton having a diameter of about 10 mm was placed on the surface. A diphenylcarbazide solution (diphenylcarbazide: 0.4 g, acetone: 20 ml, water) was placed on the cotton. : 20 ml) was dropped about 0.2 cm ³ . Then, for each sample, each discoloration state after 3 minutes, 10 minutes, and 30 minutes after the dropwise addition of the diphenylcarbazide solution was examined. The results are shown in Table 1. Here, cotton is used as the detection body, and the color of each sample itself does not affect the presence / absence of discoloration and the determination of the degree thereof.

  From Table 1, before the dropping of the diphenylcarbazide solution, all the samples were white cotton. For the sample of the trivalent chromate film, no discoloration was observed at any stage of 3 minutes, 10 minutes, and 30 minutes after the diphenylcarbazide solution was dropped, and the cotton remained white. On the other hand, in the sample of the hexavalent chromate film, the color change to pink was clearly recognized 3 minutes after the diphenylcarbazide solution was dropped, and the color change of pink was also clearly apparent after 10 minutes and 30 minutes. Recognized by Thus, hexavalent chromium could be detected with high sensitivity in a short time even by a simple method in which a diphenylcarbazide solution was dropped onto cotton at a sample temperature of about 80 ° C.

Next, a second embodiment will be described.
Here, as the sample to be evaluated, a trivalent chromate film and a hexavalent chromate film formed on the galvanized layer on the iron base layer were used as in the first example. The thickness of the iron base layer is about 2 mm, the thickness of the galvanized layer is about 7 μm, and the thickness of each of the trivalent chromate film and the hexavalent chromate film is about 500 nm.

Each of these samples was heated to about 60 ° C. and about 80 ° C., and a flat circular cotton having a diameter of about 10 mm was placed on the surface, and a diphenylcarbazide solution (diphenylcarbazide: 0.4 g, acetone) was placed on the cotton. : 20 ml, water: 20 ml) was added dropwise about 0.2 cm ³ . And about each sample, the diphenylcarbazide solution was dripped and the discoloration state after 3 minutes was investigated. The results are shown in Table 2.

  From Table 2, as for the sample of the trivalent chromate film, no discoloration was observed in both cases where the temperature was about 60 ° C. and about 80 ° C., and the cotton white color remained. On the other hand, in the sample of the hexavalent chromate film, discoloration to pink color was clearly recognized in both cases where the temperature was about 60 ° C. and about 80 ° C. Thus, when the sample temperature was about 60 ° C., hexavalent chromium could be detected with sufficient sensitivity 3 minutes after the dropwise addition of the diphenylcarbazide solution.

  As described above, here, the detection body is configured in a seal shape, and at the time of detection, the detection body is affixed to the detection body so that elution of hexavalent chromium can be performed while heating. Accordingly, it is possible to detect hexavalent chromium in a short time by attaching the detection body to the detection object and visually observing the color change without disassembling or processing the detection object. Therefore, the presence or absence of hexavalent chromium can be easily and efficiently discriminated, and the cost of analysis and evaluation can be reduced.

  In addition, the detector can be used to determine the presence or absence of a defect in the trivalent chromate layer, whereby quality control of the trivalent chromate layer can be easily and quickly performed at low cost.

  In the above description, detection of chromium has been described as an example. However, when detecting other elements such as lead, mercury, cadmium, etc., detection is performed using a detector having the same configuration as described above. It is also possible to do this. That is, by using a sensing element that, when affixed to a sensing object, elutes a predetermined element from the surface and makes it possible to artificially or mechanically determine the presence of the eluted predetermined element by discoloration, etc. It becomes possible to easily detect various elements.

  In the above explanation, an example of detecting hexavalent chromium by visual observation of discoloration, that is, an example in which a reaction part is formed of a material that reacts with hexavalent chromium and changes color, has reacted with hexavalent chromium. The material is not limited to this as long as the material can be identified.

(Supplementary note 1) In the detector used for detecting hexavalent chromium,
An elution part for eluting hexavalent chromium from the detected object in contact with the detected object;
A heating section for heating the elution section;
A reaction part containing a substance for detecting hexavalent chromium eluted in the elution part;
A detection body characterized by comprising:

(Additional remark 2) The said substance reacts with hexavalent chromium and changes color, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 3) The said heating part is comprised with the exothermic material, The detection body of Additional remark 1 characterized by the above-mentioned.

(Additional remark 4) The said heating part is comprised using the material which reacts with oxygen or water, and generate | occur | produces heat | fever, or the material which generate | occur | produces heat by voltage application, The detection body of Additional remark 3 characterized by the above-mentioned.
(Additional remark 5) The detection object of Additional remark 4 characterized by the material which generate | occur | produces heat by the said voltage application being a heating wire or a Peltier element.

(Additional remark 6) The said heating part is comprised by the microcapsule which includes the said exothermic material, and is provided in the said elution part, The detection body of Additional remark 3 characterized by the above-mentioned.
(Additional remark 7) The said heating part is comprised with the heat conductive material, The detection body of Additional remark 1 characterized by the above-mentioned.

  (Additional remark 8) The said elution part is formed using the porous material or water retention polymer | macromolecule which can hold | maintain the liquid used for the elution of the hexavalent chromium from the said to-be-detected body. The detector according to appendix 1.

(Additional remark 9) The said reaction part is comprised by resin in which the said substance contained, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 10) The said reaction part is comprised by the microcapsule which includes the said substance, and is provided in the said elution part, The detection body of Additional remark 1 characterized by the above-mentioned.

(Additional remark 11) Part or all of the surfaces except the contact surface with the said to-be-detected body of the said elution part are coat | covered with the film, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 12) It has the temperature detection part for detecting the temperature of the said elution part, The detection body of Additional remark 1 characterized by the above-mentioned.

(Additional remark 13) It has the color discrimination | determination part used for discrimination | determination of the color of the said reaction part, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 14) The detection body of Additional remark 1 characterized by the said elution part being coat | covered with the peelable seal | sticker before the contact with the said to-be-detected body and the said contact surface with the to-be-detected body.

(Additional remark 15) The said heating part is coat | covered with the peelable seal | sticker, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 16) The detection body of Additional remark 1 characterized by the said elution part and the said heating part being isolated by the film.

(Additional remark 17) The detection body of Additional remark 1 characterized by having the contact bonding layer used for adhesion | attachment with the said to-be-detected body in the contact surface side with the said to-be-detected body.
(Supplementary Note 18) In the method for detecting hexavalent chromium,
An elution part for eluting hexavalent chromium from the detected object in contact with the detected object;
A heating section for heating the elution section;
A reaction part containing a substance for detecting hexavalent chromium eluted in the elution part;
Using a detector with
The elution part of the detection body is brought into contact with the detection object, the elution part in contact with the detection object is heated by the heating unit, and the hexavalent value of the detection object is determined by the presence or absence of discoloration in the reaction unit. A detection method characterized by determining the presence or absence of chromium.

(Additional remark 19) The said substance reacts with hexavalent chromium, and discolors, The detection method of Additional remark 18 characterized by the above-mentioned.
(Additional remark 20) When heating the elution part which contacts the to-be-detected body by the heating part,
The detection method according to appendix 18, wherein the heating unit itself is heated to heat the elution unit, or heat supplied from outside is transferred to the elution unit to heat the elution unit.

It is a schematic sectional drawing of a detection body. It is a schematic sectional drawing at the time of detection body sticking. It is a schematic sectional drawing at the time of hexavalent chromium elution. It is a schematic sectional drawing at the time of reaction part discoloration. It is a cross-sectional schematic diagram of the 1st structural example of a detection body. It is a cross-sectional schematic diagram of the 2nd structural example of a detection body. It is a cross-sectional schematic diagram of the 3rd structural example of a detection body. It is a cross-sectional schematic diagram of the 4th structural example of a detection body. It is a cross-sectional schematic diagram of the 5th structural example of a detection body. It is a cross-sectional schematic diagram of the 6th structural example of a detection body. It is a cross-sectional schematic diagram of the 7th structural example of a detection body. It is a figure which shows the 8th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is CC sectional schematic diagram of (A). It is a cross-sectional schematic diagram of the modification of a detection body. It is a figure which shows the 9th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is a side surface schematic diagram. It is a figure which shows the 10th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is a DD cross section schematic diagram of (A). It is a figure which shows the 11th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is an EE cross-sectional schematic diagram of (A). It is a figure which shows the 12th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is a FF cross-sectional schematic diagram of (A). It is a figure which shows the 13th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is a GG cross-sectional schematic diagram of (A). It is a figure which shows the 1st process of a detection body sticking method, Comprising: (A) is a plane schematic diagram, (B) is a HH cross-sectional schematic diagram of (A). It is a figure which shows the 2nd process of a detection body sticking method, Comprising: (A) is a plane schematic diagram, (B) is the II cross-sectional schematic diagram of (A). It is a figure which shows the 14th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is a JJ cross-sectional schematic diagram of (A).

Explanation of symbols

1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 Detector 2, 11, 61, 81, 131, 141 Elution part 3, 14, 83, 91,134,143 Heating part 4,12,42,62,82,132,142 Reaction part 5 Evaluation target 6 Underlayer 7 Hexavalent chromate film 13, 31, 121, 133, 145 Heat resistant / translucent film 21 Elution / Reaction part 41 Elution / heating part 63, 71, 72 Microcapsule 83a, 91c, 91d Protrusion part 83b, 91e, 91f Depression 84, 135, 144 Adhesive layer 85 Heating wire 91a, 91b Metal 101 Thermo label 111 Standard color label 136a, 136b, 146a, 146b Seal seal 147 Cutout

Claims (9)

In the detector used to detect hexavalent chromium,
An elution part for eluting hexavalent chromium from the detected object in contact with the detected object;
A heating section for heating the elution section;
A reaction part containing a substance for detecting hexavalent chromium eluted in the elution part;
I have a,
The elution part is a layered shape having a surface with which the detected object contacts.
Sensing body characterized by that.   The reaction part is disposed above the elution part;
  The heating unit is disposed on the side of the elution unit,
  The detection body according to claim 1.   The reaction part is provided in the elution part;
  The detection body according to claim 1.   The heating section is provided in the elution section;
  The detection body according to claim 1.   The reaction part and the heating part are provided in the elution part,
  The detection body according to claim 1.   The substance is
  It reacts with hexavalent chromium and changes color.
  The detector according to any one of claims 1 to 5, wherein:   The heating unit is
  Composed of exothermic material,
  The detection body according to any one of claims 1 to 6, wherein:   The heating unit is
  It is composed of a material that generates heat by reacting with oxygen or water, or a material that generates heat when voltage is applied.
  The detector according to claim 7.   In the hexavalent chromium detection method,
  An elution part for eluting hexavalent chromium from the detected object in contact with the detected object;
  A heating section for heating the elution section;
  A reaction part containing a substance for detecting hexavalent chromium eluted in the elution part;
  Have
  The elution part is a layered shape having a surface with which the detected object contacts.
  Using the detection object,
  The elution part of the detection body is brought into contact with the detection object, the elution part in contact with the detection object is heated by the heating unit, and the hexavalent value of the detection object is determined depending on the presence or absence of discoloration in the reaction unit. Determine the presence or absence of chromium,
  A detection method characterized by that.

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