JP4915209B2 - 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 lead and a lead detection method.

  In recent years, with the transition of environmental regulations, the content of lead (Pb) designated as a hazardous substance tends to be regulated. Lead is used in solder, electronic parts, cables, sheet metal paints, etc., and various products using such members and parts containing lead are widely distributed. In order to guarantee the quality of products that are currently distributed and also to guarantee the quality of products that will be manufactured in the future, a method for determining the presence or absence of lead in the components and parts to be used has been demanded.

  At present, as a method for determining the presence or absence of lead, for example, parts that may contain lead are appropriately processed, and then processed by AES (Auger Electron Spectroscopy), SAM (Scanning Auger Electron Microscopy), XPS (X- A method using an analytical instrument such as ray photoelectron spectroscopy) is known.

  In addition, there is a method for simply determining the presence or absence of lead using a reagent such as a so-called lead checker. In this method, such a reagent is applied to a part or the like to be evaluated, and the presence or absence of lead in the part or the like is determined based on the degree of discoloration.

Conventionally, various detection methods have been proposed in various fields. For example, a method of simply measuring a nitrite ion concentration using a nitrite ion detection paper (see Patent Document 1), moisture on one side of a water-permeable film. A method of detecting moisture using a moisture detection label provided with a color developing layer that develops color (see Patent Document 2), 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 3) has been proposed.
JP-A-2005-76038 Japanese Patent Laid-Open No. 10-90244 Japanese Patent Laid-Open No. 9-210985

  When trying to determine the presence or absence of lead in parts used in various products, if multiple parts are obtained at once, use of attached quality data and analysis / evaluation such as sampling inspection Presence / absence can be known, so that the quality of these parts can be guaranteed relatively easily.

  However, there is a possibility that a part containing lead and a part not including lead are mixed in an existing assembly product or an OEM (Original Equipment Manufacture) product supplied from another manufacturer. In order to know whether or not lead is used, it is necessary to disassemble the assembly, etc., process it according to the evaluation method as necessary, and evaluate each disassembled or processed part. . As described above, in order to obtain quality assurance data on lead such as an assembly product, a great deal of labor and time are required, and the accompanying increase in cost cannot be ignored.

As a simple evaluation of lead, a method of applying a lead checker or the like is known. However, when this method is used for an assembly or the like, the following problems may occur.
FIG. 19 is a diagram showing an application example of a lead checker, where (A) is a diagram showing a state before coating, and (B) is a diagram showing a state after coating.

  For example, as shown in FIG. 19A, when two types of components 201 and 202 are mounted adjacent to each other on the substrate 200, first, an attempt is made to determine the presence or absence of lead in one of the components 201. Assume that In that case, if the lead checker 203 is applied to the one component 201 as shown in FIG. 19B and the component 201 contains lead, for example, the electrode 201a may contain lead. In this case, the applied lead checker 203 changes color. However, even if one of the components 201 contains lead and such discoloration occurs, the degree of discoloration is affected by the background color, and the evaluation criteria (presence and content of lead) are ambiguous. Prone.

  Further, as shown in FIG. 19B, depending on the arrangement of the components 201 and 202 on the substrate 200, the lead checker 203 applied to one component 201 to be evaluated may spread to the adjacent components 202. Can happen. Here, for example, if the electrode 201a portion of one component 201 that is actually to be evaluated does not contain lead and the electrode 202a portion of the other component 202 contains lead, that one component The lead checker 203 on 201 may be discolored.

  In recent years, a large number of components have been densely arranged inside an assembly, etc. or on a substrate. In this case, the above-mentioned cases are likely to occur. It has become difficult to individually evaluate by applying a reagent such as a checker. In addition, there are cases where regulated products with restricted lead content and exempted products with a certain amount of lead allowed are mixed inside the assembly or on the substrate. This is one of the factors that make it more difficult to evaluate parts individually.

  This invention is made | formed in view of such a point, and it aims at providing the detection body and detection method which can detect the lead which may be contained in components etc. easily and accurately.

According to one aspect of the present invention , in a detection body used for detection of lead, a reaction including an elution part for eluting lead from an object to be detected and a substance for detecting lead eluted in the elution part possess a part, wherein the the detection member to be contacted with the sensing object is provided.

  According to such a detection body, an elution part elutes lead from a to-be-detected body, and a reaction part detects the eluted lead using the substance contained there. Since the detection body having such an elution part and the reaction part is brought into contact with the detection object to determine the presence or absence of lead in the detection object, the lead of the detection object can be easily evaluated. Moreover, according to such a detection body, only the object to be detected can be evaluated easily and accurately.

Further , according to one aspect of the present invention, in the lead detection method, an elution part for eluting lead from a contacted object to be detected, and a reaction part including a substance for detecting lead eluted in the elution part When the detection object using with, the sensing member is contacted the to the detected body, detection known manner by the presence or absence of the detection of lead by the substance in the reaction section you determine the presence or absence of lead of the detection object Is provided.

  According to such a detection method, the detection object is brought into contact with the detection object, and the presence or absence of lead in the detection object is determined based on the presence or absence of lead detection in the reaction part. Thereby, it becomes possible to easily and accurately evaluate the lead of the object to be detected.

Without or processed disassemble the sensing object, also, for a particular sensing object, it is possible to determine the presence or absence of lead. Therefore, it is possible to easily and accurately evaluate the lead of the detection target object at a low cost.

Hereinafter, the form of implementation will be described in detail with reference to the drawings.
First, the detection body used for the detection of lead and the principle of the detection will be described.
FIG. 1 is a schematic sectional view of a detector.

  The detector 1 has a configuration in which a layered elution part 2 and a reaction part 3 are laminated. The detection body 1 is formed in, for example, a seal shape, and the elution part 2 side is attached to an evaluation target that is a detection target, and all or a part of the elution part 2 is adhered to the surface of the evaluation target. Can be done.

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

The reaction part 3 is a porous material such as a mesh or a filter, which is a substance (discoloring agent) that changes color (including color development, the same applies hereinafter), such as sodium sulfide (Na ₂ S) or xylenol orange, by reacting with lead. Or contained in the resin. In the detector 1, when the lead eluted from the evaluation object moves through the elution part 2 through water or a chemical solution and reaches the reaction part 3, and reacts with the color change agent contained in the reaction part 3, the reaction part 3 is discolored. The reaction unit 3 is configured to exhibit non-translucency, for example, in consideration of a color change agent, a resin, or the like to be used, or a combination thereof so as to be a reference color for such a color change. As a result, the presence or absence of the color change of the reaction unit 3 and the degree thereof can be clearly recognized while suppressing the influence of the color of the evaluation target surface. The same effect can be obtained when a light-impermeable material is used for the elution part 2.

  The planar size of the detection body 1 can be arbitrarily set according to the evaluation target. For example, when used for a screw or a component, the planar size of the detector 1 can be set to a size that can be attached to the screw head or the component, or larger. In the case of use for a plate material, a substrate, or the like, the size may be set according to the size. Moreover, although the thickness of the detection body 1 can also be set arbitrarily, it is desirable to set appropriately the thickness, especially the thickness of the elution part 2 in consideration of the elution amount of lead and the like.

  In addition, although the detection body 1 of the above structures is based also on the material, for example, the reaction part 3 is formed in a sheet form on the sheet-like elution part 2, and the elution part on the sheet-like reaction part 3 is formed. 2 is formed into a sheet shape, or the sheet-like elution part 2 and the sheet-like reaction part 3 are bonded together.

FIGS. 2 to 4 are diagrams for explaining the flow of a lead detection method using a detection body. FIG. 2 is a schematic view when the detection body is attached, FIG. 3 is a schematic view when lead is eluted, and FIG. It is the schematic at the time of partial discoloration.
When lead is detected using the detector 1, first, as shown in FIG. 2, the detector 1 is pasted on the surface of the evaluation object 4 so that the elution portion 2 is in close contact therewith. At that time, the elution part 2 contains a predetermined amount of water or a chemical solution in advance, or impregnates a predetermined amount of water or a chemical solution immediately before the detector 1 is attached to the surface of the evaluation object 4. Including water and chemicals.

  When the evaluation object 4 contains lead, the lead (Pb (II)) starts to be eluted from the evaluation object 4 as shown in FIG. 3 by the water or chemicals contained in the elution part 2. For convenience, in FIG. 3, a region in which the lead in the elution portion 2 is eluted is illustrated in a layered manner.

  Then, when a certain period of time has elapsed, as shown in FIG. 4, when the eluted lead moves through the elution part 2 and reaches the reaction part 3, the lead reacts with the color changing agent contained in the reaction part 3, The reaction part 3 changes color. The presence of lead can be detected by this discoloration. The discoloration of the reaction unit 3 can be determined by visual observation, and can also be determined using a spectrophotometer if the amount of lead elution is a certain level or more.

  As described above, by using the detection body 1 as described above, the detection body 1 can be simply attached to the evaluation object 4 without disassembling or processing the evaluation object 4, and lead contained therein Presence / absence can be determined, and lead can be detected very easily.

  In addition, when the polymer which has water retention property is used for the elution part 2, the water content of the water retention polymer material can be controlled in advance by controlling the molecular weight thereof. If this is utilized, it is possible to control the amount of water and chemicals for elution of lead 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 lead can be made constant even if the evaluation object changes.

  Further, in the above description, the detection body 1 in which the layered elution part 2 and the reaction part 3 are laminated is illustrated, but these do not necessarily need to be clearly divided into two layers, and the above-mentioned one layer is the above. It is also possible to adopt a configuration having both functions of the elution part 2 and the reaction part 3 as described above.

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.
The detector 10 shown in FIG. 5 has a configuration in which an elution part 11 and a reaction part 12 are stacked.

  The elution part 11 will not be specifically limited if the elution part 11 hold | maintains the water and chemical | medical solution for lead elution, and does not react with the water and chemical | medical solution for lead elution, and does not fix the eluted lead. For example, the elution part 11 can be made of a porous material such as a mesh or a filter, a polymer having water retention, or the like.

  The reaction section 12 contains a color change agent called a so-called lead checker. Such a reaction unit 12 is configured by, for example, containing sodium sulfide, xylenol orange, or the like as a color changing agent in a porous material such as a mesh or a filter, or a resin.

  When lead is detected using such a detection body 10, first, before the detection body 10 is attached to an evaluation target, water or chemical solution for elution of lead is dropped or impregnated into the elution portion 11. Or make it contain. And the detection body 10 is affixed on the surface of evaluation object so that the elution part 11 closely_contact | adheres. In that case, the detection body 10 comes to be affixed on the surface of evaluation object by the surface tension of the water and chemical | medical solution which are contained in the elution part 11. FIG.

  Thereby, when lead is contained in the object to be evaluated, lead is eluted from the surface by the water or chemical solution of the elution part 11, and when it reaches the reaction part 12 and a predetermined reaction occurs, the reaction part 12 changes color. On the other hand, when lead is not contained in the evaluation target, no discoloration of the reaction part 12 is observed. In this way, the presence or absence of the lead to be evaluated is determined from the color change state of the reaction portion 12 when the detector 10 is attached to the evaluation target.

FIG. 6 is a schematic cross-sectional view of a second configuration example of the detector.
The detector 20 shown in FIG. 6 has a single-layer elution / reaction part 21 including the reaction part in the elution part.

  The elution / reaction unit 21 can contain lead elution water or a chemical solution and contains a color changing agent that reacts with lead 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, and a color change agent.

  Even in the case of detecting lead using such a detection body 20, like the detection body 10 shown in FIG. 5 above, before affixing this to the evaluation object, the elution / reaction part 21 is used for lead elution. Keep water and chemicals in it. And the detection body 20 is affixed on the surface of evaluation object using the surface tension of the water or chemical | medical solution, and the presence or absence of the evaluation object lead is discriminate | determined from the discoloration state of the elution / reaction part 21. FIG.

FIG. 7 is a schematic cross-sectional view of a third configuration example of the detector.
The detector 30 shown in FIG. 7 has a laminated body of an elution part 31 and a reaction part 32.
In the elution part 31, a microcapsule 31a containing water and chemicals for elution of lead is embedded. The microcapsule 31a has various forms such as one in which the capsule wall is released by an external force and the water or chemical liquid therein is released, and the water or chemical liquid in the microcapsule 31a gradually oozes out without destruction. Is available.

  In addition, in the part of the elution part 31 excluding the microcapsules 31a, water and chemicals for elution of lead can be held for a certain period of time as materials, and the elution does not react with the water and chemicals for elution of lead. A lead that does not fix the lead that can be embedded in the microcapsule 31a is used. For example, a porous material such as a mesh or a filter, a water retaining polymer, or the like can be used.

Moreover, the reaction part 32 is comprised by containing sodium sulfide, a xylenol orange, etc. as a discoloring agent in porous materials and resin, such as a mesh and a filter, for example.
When lead is detected using such a detection body 30, before being attached to an evaluation object, the capsule wall of the microcapsule 31a is broken to release water or chemicals therein, or the microcapsule Water or chemicals are leached from 31a and attached to the surface to be evaluated. And the presence or absence of the evaluation object lead is discriminated from the discoloration state of the reaction part 32.

  In the form in which the microcapsule 31a is destroyed and water or chemical solution is discharged, the work of supplying water and chemical solution from the outside to the elution part 31 is not necessary, and therefore it is possible to perform evaluation more easily. . Further, in the form in which water or a chemical solution is leached from the microcapsule 31a, it is possible to perform long-term evaluation using the phenomenon.

  It is also possible to enclose water or a chemical solution in the microcapsule 31a and dissolve the capsule wall of the microcapsule 31a with the chemical solution or water before the detector 30 is attached to the evaluation target. . In this case, when the capsule wall of the microcapsule 31a is dissolved with the chemical solution or water, and the chemical solution or water is mixed with the water or the chemical solution contained in the microcapsule 31a, the chemical solution having a predetermined composition is added to the elution portion 31. It is also possible to control so as to be contained. Further, in order to dissolve the capsule wall of the microcapsule 31a, another solvent or the like may be used in addition to the chemical solution and water.

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 / reaction unit 41 including the reaction unit in the elution unit.

  The elution / reaction unit 41 has a configuration in which a microcapsule 41a that encloses water and chemicals for elution of lead and a microcapsule 41b that encloses a discoloring agent such as sodium sulfide and xylenol orange are embedded as a reaction unit. Yes.

  In addition, in the part of the elution / reaction unit 41 other than the microcapsules 41a and 41b, water and chemicals for elution of lead can be held as a material for a certain period of time and react with the water and chemicals for elution of lead. In addition, the one that does not fix the eluted lead and can embed the microcapsules 41a and 41b inside is used. For example, a porous material such as a mesh or a filter, a water retaining polymer, or the like can be used.

  When lead is detected using such a detector 40, the capsule walls of the microcapsules 41a and 41b are destroyed, water, a chemical solution, and a color change agent are gradually exuded from the microcapsules 41a and 41b, or Using a method such as dissolving the microcapsules 41 a and 41 b with a chemical solution or water, the water, the chemical solution, and the color changing agent are released into the elution / reaction unit 41. This is affixed to the surface of the evaluation object, and the presence or absence of lead is discriminated by checking the presence or absence of discoloration. In such a configuration, since the color changing agent is released into the elution / reaction unit 41, when lead is eluted from the evaluation target, the color change is seen relatively quickly and lead can be detected quickly. become.

  Here, the case where two types of microcapsules 41a containing water or a chemical solution and microcapsules 41b containing a color change agent are used is illustrated, but in addition, the elution / reaction unit 41 contains a color change agent. When the detection is performed by embedding only the microcapsule 41b, the capsule wall of the microcapsule 41b can be destroyed, and the elution / reaction unit 41 can contain water or a chemical solution from the outside. Alternatively, the capsule wall of the microcapsule 41b may be dissolved by water or a chemical solution contained from the outside without destroying the capsule wall.

FIG. 9 is a schematic cross-sectional view of a fifth configuration example of the detector.
The detector 50 shown in FIG. 9 has an elution part 51 and a reaction part 52, an adhesive layer 53 provided around them, and a translucent film 54 provided on the surface.

  Various forms as shown in the first and third configuration examples of FIGS. 5 and 7 can be applied to the elution part 51 and the reaction part 52. Further, here, the elution part 51 and the reaction part 52 of the laminated structure are illustrated, but in place of those laminated bodies, forms as shown in the second and fourth configuration examples of FIGS. It is also possible to apply a single layer elution / reaction part.

  The adhesive layer 53 strongly adheres the detection body 50 to the surface of the evaluation target, adheres the translucent film 54 to the surface, and further contains lead elution water or chemical solution contained in the elution portion 51. It is provided for the purpose of preventing evaporation. The material is not particularly limited. For example, PVA (Poly Vinyl Alcohol) that has been widely used as an adhesive can be used.

  The translucent film 54 serves as a protective film that protects the reaction part 52 from the outside and prevents evaporation of water and chemicals for elution of lead contained in the elution part 51. The translucent film 54 is desirably colorless and transparent so that when lead is detected, the discoloration of the reaction part 52 can be easily confirmed. For example, polyethylene terephthalate (PET) or the like is used. .

  According to the detection body 50 having such a configuration, the adhesive layer 53 can be reliably brought into close contact with the surface to be evaluated by the adhesive force of the adhesive layer 53. Furthermore, due to the sealing effect by the adhesive layer 53 and the translucent film 54, evaporation of water and chemicals contained in the elution part 51 can be suppressed, and a long time required for lead detection can be secured.

  In addition, such a detection body 50 uses the printing method etc., forms the pattern of the adhesive bond layer 53 on the translucent film 54, and the laminated body of the layered elution part 51 and the reaction part 52 between the patterns, for example Alternatively, it can be formed using a method such as forming a single-layer elution / reaction part.

  In addition, here, the configuration in which the adhesive layer 53 and the translucent film 54 are provided is illustrated, but it is also possible to have a configuration in which only one of them is provided, and in that case, a certain adhesive effect is also achieved. Alternatively, it is possible to obtain a sealing effect.

  In addition, the elution part 51 is preliminarily made to contain water or a chemical solution, and the affixing surface thereof is covered with a hermetic seal (not shown). 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 to the elution portion 51 before the detection body 50 is attached becomes unnecessary.

10A and 10B are diagrams showing a sixth configuration example of the detector, in which FIG. 10A is a schematic plan view, and FIG. 10B is a schematic cross-sectional view taken along the line CC in FIG.
In the detection body 60 shown in FIG. 10, the side surface of the laminate of the elution part 61 and the reaction part 62 and the upper surface of the reaction part 62 are covered with a heat-resistant / translucent film 63, and a heating part 64 is provided on the side part of the structure. It has the structure which was made. An adhesive layer 65 made of PVA or the like is provided on the attachment surface side of the heating unit 64. At the time of detection, the surface of the elution portion 61 that is not covered with the heat-resistant / light-transmitting film 63 is attached to the evaluation target.

  Various forms as shown in the first and third configuration examples of FIGS. 5 and 7 can be applied to the elution part 61 and the reaction part 62. In addition, the elution part 61 and the reaction part 62 of the laminated structure are illustrated here, but instead of these laminated bodies, the configurations as shown in the second and fourth configuration examples of FIGS. It is also possible to apply a single layer elution / reaction part.

The heat-resistant / light-transmitting film 63 is made of PET or the like, and protects the reaction part 62 from the outside, and plays a role of preventing evaporation of lead elution water and chemicals in the elution part 61.
The heating unit 64 is configured using an exothermic material, and is configured to heat itself and heat the elution unit 61.

The heating unit 64 contains, for example, a substance that generates heat upon 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.

When lead is detected using such a detection body 60, first, before the detection body 60 is affixed to an evaluation target, the elution part 61 contains water or a chemical solution.
At that time, when the heating unit 64 is configured to generate heat by contact with water, the heating unit 64 includes water or a chemical solution together with the elution unit 61. In this case, for example, water or a chemical solution may be dropped from the attachment surface side of the detection body 60 to the elution portion 61 and the heating portion 64, or the elution portion 61 and the heating portion 64 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 61 by the heating part 64 comes to be started.

  In addition, when the heating unit 64 is configured to generate heat by contact with air, for example, the outer surface of the heating unit 64 is covered with a hermetic seal (not shown), and the detection body 60 is attached. Just before the start of detection, the hermetic seal may be peeled off so that the heating unit 64 is brought into contact with air. Thereby, heating of the water and chemical | medical solution in the elution part 61 by the heating part 64 comes to be started.

  It should be noted that the elution part 61 is preliminarily made to contain water or a chemical solution, and its application surface is covered with a hermetic seal (not shown), and the hermetic seal is peeled off at the detection stage. 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 to the elution portion 61 before the detection body 60 is attached becomes unnecessary.

  In the detection body 60 attached to the surface to be evaluated, the elution part 61 is heated by the heating part 64, and the temperature of the water and the chemical solution in the elution part 61 rises. In general, the amount of elution of lead from the evaluation target is larger when the water and chemicals in the elution part 61 are at a higher temperature than when it is at a lower temperature. Is done in a shorter time. As described above, when the elution part 61 is heated by a method according to the form of the heating part 64, the temperature of the water or the chemical solution in the elution part 61 rises, so that the elution of lead is promoted. Therefore, the elution of lead when the elution unit 61 is heated by the heating unit 64 is more performed than the case where the elution unit 61 is not heated by the heating unit 64 and is performed in a shorter time. Become.

  When lead is contained in the evaluation target, lead is eluted by the heated water or chemical solution, and when it reaches the reaction unit 62 and a predetermined reaction occurs, the reaction unit 62 changes color. On the other hand, when lead is not contained in the evaluation target, the reaction part 62 does not change color. Thus, by elevating the temperature of the water and chemicals for elution of lead, if there is lead in the evaluation target, it can be efficiently eluted, thereby quickly and highly sensitively removing lead. It can be detected.

  In setting the temperature of heating by the heating unit 64, the heat resistance of the elution unit 61, the reaction unit 62, the heat resistant / translucent film 63 and the like are taken into consideration. The heating temperature is about 80 ° C., preferably about 60 ° C. to 80 ° C. at a temperature higher than normal temperature.

  Although not shown in the drawings, as a temperature detection means for detecting the temperature of the heating unit 64 and the elution unit 61, a color for attaching a thermo label to the upper part of the heating unit 64 or determining the color of the reaction unit 62 As a determination unit, a reference color label may be attached to the upper part of the heating unit 64.

  When the thermo label is attached, the temperature or temperature history of the heating unit 64 and the elution unit 61 can be grasped based on the color, and the temperature control and overheating prevention of the detector 60 attached to the evaluation target can be performed. For example, it becomes possible to peel the detection body 60 from the evaluation target when the temperature reaches or reaches a predetermined elution temperature.

  As the reference color label, a label of an appropriate color selected based on the relationship between the color change state of the reaction unit 62 and the lead elution amount obtained in advance is prepared. By comparing the color of the reaction unit 62 with the color of the reference color label, it is possible to estimate the presence of lead and the amount of elution.

11A and 11B are diagrams showing a seventh configuration example of the detector, in which FIG. 11A is a schematic plan view, and FIG. 11B is a schematic cross-sectional view taken along the line DD in FIG. FIG. 12 is a schematic cross-sectional view of a modified example of the detector.
In the detection body 70 shown in FIG. 11, the side surface of the laminate of the elution portion 71 and the reaction portion 72 and the upper surface of the reaction portion 72 are covered with a heat-resistant / light-transmitting film 73, and metal, ceramic, A heating unit 74 using a heat transfer material such as a heat transfer material mixed material is provided. Further, in this detection body 70, the heating portion 74 is provided with a protruding portion 74a that extends partially to the side, and a recess 74b is formed at the tip portion of the protruding portion 74a. An adhesive layer 75 made of PVA or the like is provided on the attachment surface side of the heating unit 74.

  Various forms as shown in the first and third configuration examples of FIGS. 5 and 7 can be applied to the elution part 71 and the reaction part 72, respectively. Further, here, the elution part 71 and the reaction part 72 of the laminated structure are illustrated, but in place of those laminated bodies, forms as shown in the second and fourth configuration examples of FIGS. It is also possible to apply a single layer elution / reaction part. The heat resistant / translucent film 73 is made of PET or the like.

The heating unit 74 is configured using a heat transfer material, and is configured to generate heat and heat the elution unit 71 when heat is supplied from the outside of the detection body 70. In that case, the heating unit 74 is configured using a material having good thermal conductivity. Examples of such materials include metals such as copper (Cu), aluminum (Al), and iron, 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.

  When lead is detected using such a detection body 70, after the elution portion 71 is in a state in which water and chemicals for elution of lead are contained, the detection body 70 is attached to the surface of the evaluation target, The tip of a heating tool such as a heated soldering iron is pressed against the recess 74b to heat the heating unit 74. The heating temperature is about 80 ° C., preferably about 60 ° C. to 80 ° C. at a temperature higher than normal temperature.

  Since the recess 74b is formed in the heating unit 74, it is difficult for the position of the heating tool tip 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 74 by blowing warm air.

  In this way, the heating unit 74 is heated, the temperature of the water or chemical in the elution unit 71 is increased, and the presence or absence of lead to be evaluated is determined from the discolored state of the reaction unit 72. According to such a detector 70, heat can be easily supplied from the outside to a heat transfer material such as metal or ceramic, and lead can be detected quickly and with high sensitivity.

  The heating unit 74 of the detection body 70 is heated by heat transfer using an appropriate heating tool as described above. For example, as shown in FIG. 12, a heating wire 76 is embedded in the heating unit 74, A configuration in which the heating unit 74 can generate heat by voltage application is also possible. The heating wire 76 can be embedded in, for example, a ceramic or a heat transfer substance mixed material, or can be embedded in a metal by performing appropriate sealing.

  If such a configuration using the heating wire 76 is used, at the detection stage, water or a chemical solution in the elution unit 71 is heated by external heat supply, or by applying a voltage to the heating wire 76, the elution unit 71. It is possible to select whether to heat the water or the chemical solution in the inside or both.

  In addition, the elution part 71 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 detector 70 is removed. You may make it stick on the surface of evaluation object.

Further, a thermo label or a reference color label (both not shown) may be attached to the upper portion of the heating unit 74.
FIGS. 13A and 13B are views showing an eighth configuration example of the detector, in which FIG. 13A is a schematic plan view and FIG. 13B is a schematic side view. However, in FIG. 13, the same elements as those shown in FIG. 11 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The detection body 80 shown in FIG. 13 has a configuration in which a heating unit 81 made of a Peltier element is provided on the side of the laminated body of the elution part 71 and the reaction part 72. Is different. The Peltier element of the heating unit 81 is configured by using two kinds of metals 81a and 81b having predetermined properties, and when a predetermined current is passed through the junction, the metal 81a is changed to the other metal 81b. Heat transfer occurs. The metal 81a, 81b constituting the Peltier element is provided with projecting portions 81c, 81d extending laterally, and depressions 81e, 81f are formed at the tip portions of these projecting portions 81c, 81d, respectively. ing.

  When lead is detected using such a detection body 80, after the elution portion 71 is in a state in which water and chemicals for elution of lead are contained, the detection body 80 is attached to the surface of the evaluation target, Using the recesses 81e and 81f as terminals, a predetermined current is passed through the joints of the metals 81a and 81b, so that one metal 81a is transferred to the other metal 81b, and the metal 81b is transferred to water and chemicals in the elution part 71. Do heat.

  In this way, the heating unit 81 is heated, the temperature of the water or the chemical solution in the elution unit 71 is increased, and the presence or absence of lead to be evaluated is determined from the discolored state of the reaction unit 72. According to such a detector 80, lead can be detected quickly and with high sensitivity.

In this detector 80 as well, the elution part 71 may contain water or a chemical solution in advance, and the affixed surface may be covered with a hermetic seal (not shown).
Further, a thermo label or a reference color label (both not shown) may be attached to the upper portion of the heating unit 81.

FIG. 14 is a schematic cross-sectional view of a ninth configuration example of the detector.
The detector 90 shown in FIG. 14 has a laminated body of an elution part 91 and a reaction part 92, and in the elution part 91, it comes into contact with water such as calcium oxide and sulfur trioxide as a heating part. A microcapsule 91a containing a material that generates heat is embedded. In the microcapsule 91a, the heat generating material inside is released when the capsule wall is broken by an external force, or the heat generating material inside is released when the capsule wall is dissolved by contact with water or the like. Various forms such as those can be used.

  It should be noted that the portion of the elution portion 91 excluding the microcapsules 91a can hold, as a material, lead elution water or chemical solution for a certain period of time, and does not react with lead elution water or chemical solution. A lead that does not fix the lead that can be embedded in the microcapsule 91a is used. For example, a porous material such as a mesh or a filter, a water retaining polymer, or the like can be used.

Moreover, the reaction part 92 is comprised by containing sodium sulfide, xylenol orange, etc. as a discoloring agent in porous materials and resin, such as a mesh and a filter, for example.
When lead is detected using such a detector 90, first, the capsule wall of the microcapsule 91a is broken and eluted by a method such as dripping or impregnation before the detector 90 is attached to an evaluation target. The part 91 is made to contain water or chemicals. Alternatively, before the detector 90 is attached to the evaluation target, the elution part 91 contains water or a chemical solution by a method such as dropping or impregnation, and the capsule wall of the microcapsule 91a is dissolved with the water or the chemical solution. Then, the detection body 90 is affixed on the surface of evaluation object so that the elution part 91 closely_contact | adheres.

  The water and the chemical solution in the elution part 91 are brought into contact with the heat generating material released from the microcapsule 91a to increase the temperature. When lead is contained in the evaluation target, lead elutes in the heated water or chemical solution, and when the eluted lead reaches the reaction part 92, the reaction part 92 changes color due to the reaction between lead and the color changing agent. .

Note that an adhesive layer and a heat-resistant translucent film similar to those of the detection body 50 shown in FIG. 9 may be formed in such a structure of the detection body 90.
FIG. 15 is a schematic cross-sectional view of a tenth configuration example of the detector.

The detector 100 shown in FIG. 15 has a single-layer elution / reaction unit 101 including a reaction unit in the elution unit.
The elution / reaction unit 101 contains water and chemicals for elution of lead. Furthermore, in the elution / reaction unit 101, a microcapsule 101a that functions as a heating unit and a microcapsule 101b that functions as a reaction unit are embedded.

  The microcapsule 101a serving as a heating unit contains a material that generates heat when in contact with water such as calcium oxide or sulfur trioxide. In addition, the microcapsule 101b serving as the reaction part contains a color change agent such as sodium sulfide or xylenol orange. These microcapsules 101a and 101b are those in which the capsule wall is broken by an external force, the heat generating material and the color change agent are released, or 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 of the elution / reaction unit 101 other than the microcapsules 101a and 101b, water and chemicals for elution of lead can be held as a material for a certain period of time, and it reacts with water and chemicals for elution of lead. The lead that does not fix the eluted lead and can embed the microcapsules 101a and 101b is used. For example, a mesh, a filter, a water retaining polymer, or the like can be used.

  When lead is detected using such a detection body 100, first, before the detection body 100 is attached to an evaluation target, the capsule walls of the microcapsules 101a and 101b are destroyed and dropped or impregnated. Then, the elution / reaction unit 101 contains water or a chemical solution. Alternatively, before the detector 100 is attached to the evaluation target, water or a chemical solution is contained in the elution / reaction unit 101 by a method such as dropping or impregnation, and the capsule walls of the microcapsules 101a and 101b are dissolved with the water or the chemical solution. .

  The water or chemical contained in the detection body 100 is heated in contact with the heat generating material released from the microcapsule 101a. When lead is contained in the evaluation target, the lead elutes in the heated water or chemical solution, and the eluted lead reacts with the color changing agent released from the microcapsule 101b, so that the detection body 100 changes color. .

In addition, you may make it form the adhesive layer similar to the detection body 50 shown in the said FIG. 9, and a heat resistant translucent film in such a structure of the detection body 100. FIG.
In this example, two types of microcapsules 101a functioning as a heating unit and microcapsules 101b functioning as a reaction unit are used. An agent may be contained, and only microcapsules may be used for heating.

FIG. 16 is a schematic sectional view of an eleventh configuration example of the detection body.
The detection body 110 shown in FIG. 16 has a laminated body of the elution part 111 and the reaction part 112.
A granular polishing part 111 a is embedded in the elution part 111. The elution part 111 can hold water or chemicals for elution of lead for a certain period of time, does not react with water or chemicals for elution of lead, and does not fix the eluted lead, What can embed polish part 111a is used. For example, a porous material such as a mesh or a filter, a water retaining polymer, or the like can be used.

  Further, the polishing part 111a is made of a material that does not react with lead and does not fix the eluted lead, such as aluminum oxide particles. Such a granular polishing portion 111 a is embedded in the elution portion 111 when it is formed.

For example, the reaction unit 112 includes a porous material such as a mesh or a filter or a resin containing sodium sulfide, xylenol orange, or the like as a color changing agent.
When lead is detected using such a detection body 110, first, before the detection body 110 is attached to an evaluation target, water or chemicals for elution of lead is dropped or impregnated into the elution portion 111. Or make it contain. And the detection body 110 is affixed on the surface of evaluation object so that the elution part 111 may closely_contact | adhere.

  At this time, the surface of the evaluation object and the elution part are rubbed with a finger from the reaction part 112 side, or the detection object 110 and the evaluation object are mechanically vibrated or ultrasonic waves are applied. 111 is rubbed together. As a result, the surface to be evaluated is polished by the polishing part 111a embedded in the elution part 111, a highly reactive surface is exposed, and the contact area with water and chemicals is increased. Lead tends to elute from the surface. Even if the evaluation target is subjected to a surface treatment such as anticorrosion treatment without using lead, the layer under the surface treatment is exposed, and whether or not there is lead Can be evaluated.

  When lead is contained in the evaluation target, lead is eluted from the polished surface to the elution part 111, and when it reaches the reaction part 112 and a predetermined reaction occurs, the reaction part 112 is Discolor. On the other hand, when lead is not contained in the evaluation target, no discoloration of the reaction part 112 is observed.

Thus, by polishing the surface to be evaluated, the presence or absence of lead can be more accurately determined.
Note that an adhesive layer and a light-transmitting film similar to those of the detection body 50 shown in FIG. 9 may be formed on such a structure of the detection body 110.

Also in the detection body 110, the elution part 111 may be preliminarily filled with water or a chemical solution and covered with a hermetic seal (not shown).
Moreover, you may make it provide the heating part of a form as shown in the said FIGS. 10-15 in such a structure of the detection body 110. FIG.

FIG. 17 is a schematic sectional view of a twelfth configuration example of the detector.
The detection body 120 shown in FIG. 17 has a laminated body of the elution part 121 and the reaction part 122, and further, a layered polishing part 123 is provided on the surface side of the elution part 121 opposite to the reaction part 122 side. It has a configuration.

  The elution part 121 can hold water and chemicals for elution of lead for a certain period of time, does not react with water and chemicals for elution of lead, and does not fix the eluted lead, for example, Porous materials such as meshes and filters, water-retaining polymers, and the like can be used.

For example, the reaction unit 122 includes a porous material such as a mesh or a filter or a resin containing sodium sulfide, xylenol orange, or the like as a color changing agent.
For the polishing part 123, water or chemical solution contained in the elution part 121, a substance through which lead eluted thereby, for example, a mesh structure, or the like is used.

  The detector 120 is formed, for example, by laminating the elution part 121 and the reaction part 122 in this order on the layered polishing part 123, or by forming a laminated body of the elution part 121 and the reaction part 122 formed in advance. It can be formed by a method such as bonding to the polishing portion 123.

  When lead is detected using such a detection body 120, first, after the detection body 120 is affixed to the surface of the evaluation target by containing water or chemicals for elution of lead in the elution portion 111, The surface of the evaluation object and the elution part 111 are rubbed by means such as rubbing the detection object 120 with a finger from the reaction part 122 side, or applying mechanical vibration or applying ultrasonic waves to the detection object 120 or the evaluation object. Make sure they are matched.

  Thereby, it becomes easy to elute lead from the surface of the evaluation object by water or chemicals, and when the evaluation object contains lead, the lead eluted from the polished surface reaches the reaction part 122. Then, a predetermined reaction occurs and the reaction part 122 changes color. On the other hand, when lead is not contained in the evaluation target, no discoloration of the reaction part 122 is observed.

In addition, you may make it form the adhesive layer and translucent film similar to the detection body 50 shown in the said FIG. 9 in such a structure of the detection body 120. FIG.
Also in this detection body 120, the elution part 121 may be preliminarily filled with water or a chemical solution and covered with a hermetic seal (not shown).

Moreover, you may make it provide the heating part of a form as shown in the said FIGS. 10-15 in such a structure of the detection body 120. FIG.
FIG. 18 is a schematic sectional view of a thirteenth configuration example of the detector.

A detector 130 shown in FIG. 18 has a configuration in which a plurality of cells 133 formed of a laminate of an elution part 131 and a reaction part 132 are arranged in parallel via an adhesive layer 134.
Various forms as shown in the first and third configuration examples of FIGS. 5 and 7 can be applied to the elution part 131 and the reaction part 132 of each cell 133. Further, here, the elution part 131 and the reaction part 132 of the laminated structure are illustrated, but instead of those laminated bodies, the simple structure as shown in the second and fourth configuration examples of FIGS. It is also possible to apply a layer elution / reaction section.

  The adhesive layer 134 is provided so as to cover the side surface of each cell 133 to isolate them, and also serves to affix the detector 130 to the surface of the evaluation target and lead elution contained in the elution part 131. It plays a role in preventing evaporation of water and chemicals. In some cases, the light-transmitting film is adhered to the upper surface of the cell 133 (reaction portion 132 side). For such an adhesive layer 134, PVA or the like can be used.

  Each cell 133 can be, for example, a cylindrical shape with a diameter of 50 μm to 100 μm or a rectangular parallelepiped shape with a diameter of 50 μm to 100 μm. Moreover, the pitch of each cell 133 can be 50 micrometers-100 micrometers, for example.

Such a detector 130 can be suitably used when evaluating the presence or absence of lead in the plurality of components 141 and 142 mounted on the substrate 140 as shown in FIG.
For example, it is assumed that one component 141 on the substrate 140 has an electrode 141a containing lead, and the other component 142 has an electrode 142a not containing lead. In this case, when the detector 130 in a state where water or a chemical solution is contained in the elution part 131 of each cell 133 is attached to the substrate 140, the cell 133 is located immediately above the component 141, and includes an electrode containing lead. The discoloration appears in the reaction part 132 of the cell 133 in contact with 141a, and no discoloration appears in the reaction part 132 of the other cells 133. As a result, the position and distribution of the lead-containing region on the substrate 140 can be grasped, and further, the lead-containing portions of the components 141 and 142 on the substrate 140 can be grasped.

  For example, the detector 130 having such a configuration is formed by forming a pattern of the adhesive layer 134 in which a large number of holes of a predetermined size are formed on an appropriate film using a printing method or the like, and then forming a single layer in the holes. Alternatively, it can be formed by forming a cell 133 having a laminated structure. For example, the elution part 131 or the reaction part 132 is embedded in the hole, and the reaction part 132 or the elution part 131 is laminated thereon. Alternatively, the hole is embedded in a single layer elution / reaction part. Alternatively, a first adhesive layer (a part of the adhesive layer 134) in which holes are first formed is formed, the holes are filled with the elution part 131 or the reaction part 132, and the holes are similarly formed thereon. 2 adhesive layers (remaining portions of the adhesive layer 134) are formed, and the holes are filled with the reaction portion 132 or the elution portion 131 to form a laminated structure.

Note that a light-transmitting film similar to the detector 50 shown in FIG. 9 may be formed on such a structure of the detector 130.
Alternatively, water or a chemical solution may be previously contained on the elution part 131 side and the affixed surface may be covered with a hermetic seal (not shown).

  18 is provided on the side surface of the detector 130 as shown in FIG. 18, or the elution part 131 of each cell 133 is shown in FIG. A heating unit (microcapsule) having a form as shown in FIG. 15 is provided after a heating unit (microcapsule) of a different form is provided, or a single-layer elution / reaction unit is applied to the detector 130. It may be provided.

Then, the specific example which implemented the detection of lead is demonstrated.
First, the first embodiment will be described.
Here, as a sample to be evaluated, a glass plate and one formed with electroless nickel (Ni) plating containing lead are used. After scratching the surface of these two types of samples with # 1000 abrasive, about 5 mm square filters were placed on each surface, and about 0.2 cm ³ of xylenol orange was dropped as a lead checker reagent. Table 1 shows the color of each filter after drying.

  From Table 1, the discoloration of the filter to which the lead checker reagent was dropped was not observed for the glass plate sample. On the other hand, for the sample on which the electroless nickel plating was formed, the color change of the filter on which the lead checker reagent was dropped to purple was clearly recognized. Thus, it was possible to detect lead from the sample with high sensitivity even by a simple method in which the lead checker reagent was dropped onto the filter.

Next, a second embodiment will be described.
Here, as the sample to be evaluated, the glass plate and the one formed with electroless nickel plating containing lead were used, as in the first example.

A filter of about 5 mm square was placed on the surface of each of the two types of samples, and about 0.2 cm ³ of water was dropped on the filter, and then heated at about 60 ° C. or about 80 ° C. for about 5 minutes. During heating, the lid was covered with a preparation to suppress water evaporation. After heating, the filter was peeled off from each sample, and the peeled filter was dried. Then, about 0.2 cm ³ of xylenol orange as a lead checker reagent was dropped onto the dried filter. The color of each filter 1 minute after xylenol orange was dropped is shown in Table 2 (see the column of “Xylenol orange dripping after water elution” in Table 2).

  From Table 2, for the glass plate sample, no color change of the filter was observed even when the lead checker reagent was dropped, whereas for the sample on which the electroless nickel plating was formed, the filter with the lead checker reagent dropped Discoloration to purple was observed. Thereby, it was confirmed that it was possible to elute lead from a sample with water.

In addition, a filter of about 5 mm square is placed on the surface of two types of samples each formed with a glass plate and electroless nickel plating containing lead, and about 0.2 cm of xylenol orange is used as a lead checker reagent on the filter. ³ was added dropwise and heated at about 60 ° C. or about 80 ° C. to about 5 minutes. During heating, the sample was capped with a preparation to prevent reagent evaporation. After heating, the filter was peeled off from each sample, and the peeled filter was dried. The color of each filter after drying is shown in Table 2 (see the column of “Xylenol Orange Elution” in Table 2).

  In this case as well, for the glass plate sample, no filter discoloration was observed even when the lead checker reagent was dropped, whereas for the sample on which the electroless nickel plating was formed, the filter with the lead checker reagent dropped Discoloration to purple was observed. Thereby, it was confirmed that it is possible to elute lead from a sample with a lead checker reagent.

Next, a third embodiment will be described.
Here, as a sample to be evaluated, a lead tin (PbSn) solder (40Pb-60Sn) wire having a diameter of about 1 mm and a wire that was scratched by an abrasive of # 1000 were used. A filter of about 5 mm square was placed on each of these two types of samples, and about 0.2 cm ³ of xylenol orange was dropped as a lead checker reagent.

  As a result, purple discoloration was recognized at the contact portion of the filter with the solder wire, and no discoloration was observed at the non-contact portion with the solder wire. This confirmed that the presence or absence of lead and its position can be evaluated by discoloration on the filter.

  As described above, the detection body for detecting lead is configured in a seal shape, and at the time of detection, it is pasted on a body to be detected such as a component. Accordingly, it is possible to detect lead by visual observation of discoloration or the like by attaching the detection body to the detection body without disassembling or processing the detection body. Therefore, the presence / absence of lead can be easily and accurately determined, and the cost of analysis / evaluation can be reduced. In addition to evaluating individual parts such as assemblies and parts before mounting on the board, it also applies to individual parts that are densely arranged inside the assembly and on the board. It becomes possible to determine the presence or absence of lead simply and accurately.

  In the above description, an example in which lead is detected by visual observation of discoloration, that is, an example in which the reaction part is configured by a material that reacts with lead and discolors, is a material that can identify that it has reacted with lead. This is not limited to this.

(Additional remark 1) In the detection body used for the detection of lead,
An elution part for eluting lead from the object to be detected;
A reaction part containing a substance for detecting lead eluted in the elution part;
A detection body characterized by comprising:

  (Additional remark 2) The said elution part is formed using the porous material or water retention polymer which can hold | maintain the liquid used for the elution of the lead from the said to-be-detected body, The additional remark 1 characterized by the above-mentioned. The detector.

(Additional remark 3) The said elution part has a microcapsule which includes the liquid used for the elution of the lead from the said to-be-detected body, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 4) The said reaction part is comprised with the porous material or resin in which the said substance contained, and is provided in contact with the said elution part, The detection body of Additional remark 1 characterized by the above-mentioned.

(Additional remark 5) 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 6) The said elution part or the said reaction part is formed using the opaque material, The detection body of Additional remark 1 characterized by the above-mentioned.

(Additional remark 7) Part or all of the surface except the surface which contacts the said to-be-detected body is coat | covered with the translucent film, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 8) 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 surface side which contacts the said to-be-detected body.

(Additional remark 9) It has a heating part which heats the said elution part, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 10) The said heating part is comprised using the exothermic material which generate | occur | produces heat | fever by reaction, The detection body of Additional remark 9 characterized by the above-mentioned.

(Additional remark 11) The said exothermic material is included in the microcapsule, and is provided in the said elution part, The detection body of Additional remark 10 characterized by the above-mentioned.
(Additional remark 12) The said heating part is comprised with the heat conductive material which transfers the heat which generate | occur | produced by the heat supplied from the outside or the voltage application to the said elution part, The detection body of Additional remark 9 characterized by the above-mentioned. .

(Additional remark 13) It has a grinding | polishing part for grind | polishing the said to-be-detected body to contact, The detection body of Additional remark 1 characterized by the above-mentioned.
(Additional remark 14) The said grinding | polishing part is comprised by the granular form, The detection body of Additional remark 13 characterized by the above-mentioned is provided in the said elution part.

(Additional remark 15) The said grinding | polishing part is comprised in the layer form, and is provided in the surface which contacts the said to-be-detected body, The detection body of Additional remark 13 characterized by the above-mentioned.
(Supplementary note 16) The detector according to supplementary note 1, comprising a plurality of cells each having the elution part and the reaction part, wherein the plurality of cells are arranged in a state of being isolated from each other.

(Supplementary Note 17) In the lead detection method,
An elution part for eluting lead from the object to be detected;
A reaction part containing a substance for detecting lead eluted in the elution part;
Using a detector with
A detection method comprising: bringing the detection object into contact with the detection object; and determining the presence or absence of lead in the detection object based on whether or not lead is detected by the substance in the reaction unit.

(Additional remark 18) The said detection body has a heating part which heats the said elution part,
The detection body is brought into contact with the detection object, the elution part is heated by the heating part, and the presence or absence of lead in the detection object is determined by the presence or absence of lead detection by the substance in the reaction part. The detection method according to supplementary note 17, which is a feature.

(Additional remark 19) The said detection body has a grinding | polishing part for grind | polishing the said to-be-detected body to contact,
Contacting the detection object with the detection object, polishing the detection object by the polishing unit, and determining the presence or absence of lead in the detection object by the presence or absence of lead detection by the substance in the reaction unit The detection method according to appendix 17, characterized by:

(Supplementary Note 20) The detection body includes a plurality of cells having the elution part and the reaction part, and the plurality of cells are arranged in a state of being isolated from each other,
Item 18. The supplementary note 17, wherein the elution part of the detection object is brought into contact with the object to be detected, and the presence or absence of lead in the object to be detected is determined by the presence or absence of detection of lead by the substance in the reaction part. Detection method.

It is a schematic sectional drawing of a detection body. It is the schematic at the time of detection body sticking. It is the schematic at the time of lead elution. It is the schematic 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 figure which shows the 6th structural example of a detection body, Comprising: (A) is a plane schematic diagram, (B) is CC sectional schematic diagram of (A). It is a figure which shows the 7th 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 cross-sectional schematic diagram of the modification 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 a side surface schematic diagram. It is a cross-sectional schematic diagram of the 9th structural example of a detection body. It is a cross-sectional schematic diagram of the 10th structural example of a detection body. It is a cross-sectional schematic diagram of the 11th structural example of a detection body. It is a cross-sectional schematic diagram of the 12th structural example of a detection body. It is a cross-sectional schematic diagram of the 13th structural example of a detection body. It is a figure which shows the example of application of a lead checker, Comprising: (A) is a figure which shows the state before application | coating, (B) is a figure which shows the state after application | coating.

Explanation of symbols

1,10,20,30,40,50,60,70,80,90,100,110,120,130 Detector 2,11,31,51,61,71,91,111,121,131 Elution part 3, 12, 32, 52, 62, 72, 92, 112, 122, 132 Reaction part 4 Evaluation object 21, 41, 101 Elution / reaction part 31a, 41a, 41b, 91a, 101a, 101b Microcapsule 53, 65, 75,134 Adhesive layer 54 Translucent film 63,73 Heat-resistant / translucent film 64,74,81 Heating part 74a, 81c, 81d Protruding part 74b, 81e, 81f Depression 76 Heating wire 81a, 81b Metal 111a, 123 Polishing part 133 cell 140 substrate 141, 142 parts 141a, 142a electrode

Claims (6)

In the detection body used for lead detection,
An elution part for eluting lead from the object to be detected;
A reaction part containing a substance for detecting lead eluted in the elution part;
I have a,
A detection body which is in contact with the detection target body.   The detection body according to claim 1, wherein the elution part has a microcapsule containing a liquid used for elution of lead from the detection object.   The detector according to claim 1, further comprising a heating section that heats the elution section.   The detection body according to claim 1, further comprising a polishing portion for polishing the object to be detected that comes into contact therewith.   The detector according to claim 1, comprising a plurality of cells each having the elution part and the reaction part, wherein the plurality of cells are arranged in a state of being isolated from each other. In the lead detection method,
An elution part for eluting lead from the object to be detected;
A reaction part containing a substance for detecting lead eluted in the elution part;
Using a detector with
A detection method comprising: bringing the detection object into contact with the detection object; and determining the presence or absence of lead in the detection object based on whether or not lead is detected by the substance in the reaction unit.

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