CN1882832A - Gas sensing member and gas detection apparatus suitable therefor - Google Patents
Gas sensing member and gas detection apparatus suitable therefor Download PDFInfo
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- CN1882832A CN1882832A CN 200480033675 CN200480033675A CN1882832A CN 1882832 A CN1882832 A CN 1882832A CN 200480033675 CN200480033675 CN 200480033675 CN 200480033675 A CN200480033675 A CN 200480033675A CN 1882832 A CN1882832 A CN 1882832A
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Abstract
A gas sensing member that can minimize corrosion and sensitivity deterioration attributed to sublimation of reactive reagents. There is provided a gas sensing member comprising frame (1) having one of its opposite faces fitted with non-gas-permeable optical concentration detection window (4) capable of optical concentration detection and having the other of its opposite faces fitted with gas permeable layer (6) capable of gas inflow and, housed in the frame (1), reactive reagent impregnation material (7) capable of being impregnated with a reactive reagent which is colored by reaction with subject gas.
Description
Technical field
The present invention relates to the gas-detecting device that utilizes chromogenic reaction to come the gas of detected gas concentration to predict device (gassensing member) and be applicable to it.
Background technology
On carriers such as cellulose, predict device by producing the gas that reacts look with gas reaction, although can detect the extremely low gas of concentration really by prolonging sample time, yet, owing to usually carrier being configured as band shape and being housed in the reel to be supplied to, so need paper advance mechanism etc., there are a series of problems thus, as not only causing the structure complicated of determinator, and carry the reaction reagent hold and make the carrier deterioration, carrier can rupture etc. during paper feeding.
In order to eliminate this problem, referring to patent documentation 1 as can be known, a kind of device that predicts is provided, this predicts device and constitutes, thereby reaction reagent and its carrier of dipping are housed in the slim container as reaction vessel (cell) by the film that can rupture, the fracture film is impregnated in the carrier reaction reagent during use, and carrier is exposed in the gas to measure.
Can prevent the deterioration under the unused state thus as far as possible, in addition, because without paper advance mechanism, so can make the determinator miniaturization.
Patent documentation 1: the spy opens the 2003-139762 communique
But there is following unfavorable condition, the reaction reagent that promptly is immersed in the carrier will volatilize in mensuration, and in the testing agency attached to the optical density of measuring carrier, thereby might cause detection sensitivity to change, or under the situation of the reagent that contains acid, produce corrosion.
Summary of the invention
The present invention puts forward in view of described problem just, and its objective is provides a kind of gas to predict device, can only may prevent the change of the sensitivity that the volatilization by reaction reagent causes and the generation of corrosion.
In addition, another object of the present invention provides and is applicable to that above-mentioned gas predicts the determinator of device.
In order to realize this problem, the described technical scheme of claim 1 constitutes, in following container, form the space, described container forms the optical density detection window of the non-pneumatic permeability that can detect optical density on the one side of phase opposed faces, but on another side, formed the window of inflow gas, and accommodated reaction reagent in above-mentioned space by reacting and develop the color with tested gas.
The described technical scheme of claim 2 is that the optical density detection window constitutes, and adheres to the film with photopermeability and non-pneumatic permeability on the framework that constitutes said vesse.
The described technical scheme of claim 3 is that the optical density detection window is formed when coming the injection moulding said vesse by the material with photopermeability and non-pneumatic permeability simultaneously.
The described technical scheme of claim 4 is to contain the reaction reagent impregnated material of the above-mentioned reaction reagent of dipping in above-mentioned space.
The described technical scheme of claim 5 is, will form as light reflection surface with opposed of the above-mentioned reaction reagent impregnated material of above-mentioned another side.
The described technical scheme of claim 6 comprises: opening is in the gas exposure portion of sampling runner; Mutually opposed with above-mentioned exposure portion, as to have lighting means and be subjected to optical mechanism spectrodensitometry portion, above-mentioned gas exposure portion can be disposed with spectrodensitometry portion with advancing and retreat relatively, accommodate the gas inflow side that gas predicts device in above-mentioned gas exposure portion, and accommodate the optical density detection window in above-mentioned spectrodensitometry portion.
The described technical scheme of claim 7 is that above-mentioned optical density test section and above-mentioned gas predict device, constitute to keep bubble-tight mode.
According to the technical scheme of claim 1 as can be known, can stop gas and reaction reagent to flow to the active test section of optics, so can prevent the change of the sensitivity that causes by the reaction reagent volatilization and the generation of corrosion as far as possible by the optical density detection window.
According to the technical scheme of claim 2 as can be known, the material that can select to constitute the optical density detection window and container material independently mutually.
According to the technical scheme of claim 3 as can be known, both need not to constitute the adhesion operation of the film of optical density detection window, and can prevent to spill by adhering to the bad liquid that causes.
According to the technical scheme of claim 4 as can be known, even aqueous reaction reagent also can remain on as far as possible in the reaction reagent impregnated material, thereby prevent to spill.
According to the technical scheme of claim 5 as can be known, can prevent the absorption of lighting means light as far as possible, with the optical density of high-sensitivity detection reaction reagent.
According to the technical scheme of claim 6 as can be known, having covered under the state of tested gas and reaction reagent, can detect optical density by the optical density detection window of non-pneumatic permeability.
According to the technical scheme of claim 7 as can be known, can prevent that tested gas from flowing into spectrodensitometry portion.
Description of drawings
Figure among Fig. 1 (A), (B) represent that respectively gas of the present invention predicts sectional view and the assembling stereogram of the 1st embodiment of device.
Fig. 2 is at the figure that an embodiment of expression gas-detecting device of the present invention under the state that gas predicts device has been installed.
Fig. 3 is the sectional view that expression gas of the present invention predicts other embodiment of device.
Figure among Fig. 4 (A), (B) represent that respectively gas of the present invention predicts sectional view and the assembling stereogram of the 2nd embodiment of device.
Description of reference numerals:
The runner 22 exposure portions 23 mensuration heads 26 that film 4 optical density detection window 6 gas permeation layer 6a pores 7 reaction reagent impregnated materials 10 gases of 1 ring-type framework, 3 non-aerations predict device 20 tested gases are subjected to optical mechanism 27 lighting means
Embodiment
Figure among Fig. 1 (A), (B) represent that respectively gas of the present invention predicts sectional view and the assembling stereogram of an embodiment of device, and the one side 2 of the film 3 sealing ring frameworks 1 by transparent or semitransparent and non-aeration is so form optical density detection window 4.And form gas permeation layer 6 on the another side 5, thereby constitute reaction vessel (cell).Constitute the material of accommodating the colour saturation that can detect the look variation according to the reaction of reagent in inside, preferred white porous material is the reaction reagent impregnated materials 7 such as corrosion cloth that comprise glass fibre in the present embodiment.
Reaction reagent impregnated material 7 is accommodated, and is close on the film 2 that leans against optical density detection window 4, detects so that utilize the aftermentioned determinator to carry out optical density.
Can make reaction reagent pre-soaked in reaction reagent impregnated material 7 after, be housed in again in the reaction vessel 6, perhaps also can earlier reaction reagent impregnated material 7 be housed in the reaction vessel 6,, and penetrate in the impregnated material 7 from the pore 6a of the gas permeation layer both quantitative reaction reagent that drips.
In addition, Reference numeral 9 is arranged on the framework on the optical density detection window 4, is formed with to be used for guiding aftermentioned to measure the tapered portion 9a on the top of head.
Fig. 2 represents to be applicable to that with this structure that predicts mechanism above-mentioned gas predicts the figure of an embodiment of the determinator of device 10, comprise: the runner 20 at tested gas has the exposure portion 22 of opening 21 and measures head 23, measures head 23 and constitutes and can advance and retreat relatively with exposure portion 22.
Predict the vertical through hole 24 of the detection window 4 of device 10 with gas and intersect the inclination through hole 25,25 that forms on this top measuring to form on the head 23, accommodated respectively and be subjected to optical mechanism 26 and lighting means 27.
Opening in exposure portion 22 disposes air seal parts 28 such as seal, thereby is fastened on the side face that gas predicts device 10 airtightly.In addition, elder generation disposes annular seal at the face place of the mensuration head 23 that the periphery with optical density detection window 4 contacts, and can prevent that thus tested gas or reaction reagent from flowing into the inside of measuring head 23.
In this embodiment, optical density detection window 4 with detecting device 10 is the bottom, promptly to install towards the mode of measuring head 23, make exposure portion 22 and measure head 23 and engage, when attracting tested gas by suction pump, then the part of tested gas flows to opening 21, further by the pore 6a of gas permeation layer 6, flows in the reaction reagent impregnated material 7 from here.
Thus, the reaction reagent of reaction reagent impregnated material 7 and gas precursor reactant and chromogenic reaction takes place.Behind the process given time, when time-and-motion study head 23 irradiate light that lighting means 27 is emitted is on optical density detection window 4, then the optical density corresponding to reflection reagent-impregnated material 7 produces reflection, so by being subjected to optical mechanism 26 to detect this reflected light, can know the concentration of tested gas.
In the present embodiment, optical density detection window 4 is configured to the below, thus reaction reagent impregnated material 7 be close on the film 3 that leans against optical density detection window 4, thereby can be really and the concentration change of detection reaction reagent-impregnated material 7 correctly.
In addition, if in advance the reaction reagent impregnated material 7 opposed faces with gas permeation layer 6 are reflected finishing, then can not absorb the light of lighting means 27, can be really and the optical density of detection reaction reagent-impregnated material 7 in high sensitivity.
Yet the opening of measuring head 23 is that the film 3 by the optical density detection window 4 that predicts device 10 seals, and thus, the volatile matter of tested gas and reaction reagent can not flow to measures head 23, can not make to be subjected to optical mechanism 26 and lighting means 27 fuzzy or corrosion.
When measuring termination, mensuration head 23 is retreated to change reaction vessel, can carry out follow-up mensuration thus.
In addition, in the above-described embodiments, the gas permeation layer constitutes by other material, but as shown in Figure 3, clearly also can constitute: being has round-ended cylinder shape landform framework 1 circlewise, forms the pore 6a that gas permeation is used at bottom 1a, so also plays same effect.
Fig. 4 (A), (B) are the figure that expression gas predicts the 2nd embodiment of device 10 ', macromolecular material such as tygon to photopermeability carries out injection moulding in the present embodiment, integrally formed thus framework 1 ' and the thinner wall section 2 ' that becomes the optical density detection window also can be integrally formed in face side with tapered portion 1b ' as required.
In the present embodiment, from the filling of the peristome 1a ' side of framework 1 ' pre-soaked the reaction reagent impregnated material 7 or the reaction reagent impregnated material 7 of reaction reagent, gas permeation layer 6 is sticked on the peristome 1a ', predict device 10 ' thereby constitute gas.
According to present embodiment as can be known, not only need not to use the film 3 of transparent or the translucent and non-aeration shown in the 1st embodiment, needn't with bonding agent etc. film 3 be sticked on the framework with taking a lot of trouble, also can prevent the leakage of the liquid that causes by the bonding bad of film 3 to the pick-up unit side.
In addition, in the above-described embodiments, the reaction reagent impregnated material is housed in the space that is formed at container, the dipping reaction reagent, reaction reagent is remained in the reaction reagent impregnated material, to prevent leakage towards the outside, still if reagent is carried out high viscosity processing or paste processing, then can be without the reaction reagent impregnated material.
Claims (7)
1. a gas predicts device, constitute, in following container, form the space, described container forms the optical density detection window of the non-pneumatic permeability that can detect optical density on the one side of phase opposed faces, but on another side, formed the window of inflow gas, and accommodated reaction reagent in above-mentioned space by reacting and develop the color with tested gas.
2. gas as claimed in claim 1 predicts device, and wherein, the optical density detection window constitutes, and adheres to the film with photopermeability and non-pneumatic permeability on the framework that constitutes said vesse.
3. gas as claimed in claim 1 predicts device, and wherein, the optical density detection window is formed when coming the injection moulding said vesse by the material with photopermeability and non-pneumatic permeability simultaneously.
4. gas as claimed in claim 1 predicts device, wherein, contains the reaction reagent impregnated material of the above-mentioned reaction reagent of dipping in above-mentioned space.
5. gas as claimed in claim 1 predicts device, and wherein, light reflection surface is formed on, but on another side the side window of inflow gas, that accommodated above-mentioned reaction reagent.
6. gas-detecting device comprises: opening is in the gas exposure portion of sampling runner; Mutually opposed with above-mentioned exposure portion, as to have lighting means and be subjected to optical mechanism spectrodensitometry portion, above-mentioned gas exposure portion can be disposed with spectrodensitometry portion with advancing and retreat relatively, accommodate the gas inflow side that gas predicts device in above-mentioned gas exposure portion, and accommodate the optical density test section in above-mentioned spectrodensitometry portion.
7. gas-detecting device as claimed in claim 6, wherein, above-mentioned optical density test section and above-mentioned gas predict device, constitute to keep bubble-tight mode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP384019/2003 | 2003-11-13 | ||
| JP2003384019 | 2003-11-13 | ||
| JP300920/2004 | 2004-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1882832A true CN1882832A (en) | 2006-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480033675 Pending CN1882832A (en) | 2003-11-13 | 2004-11-12 | Gas sensing member and gas detection apparatus suitable therefor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103110407A (en) * | 2013-03-07 | 2013-05-22 | 北京捷迈德医药科技有限公司 | Olfactory sensation test card and olfactory sensation test method |
| CN104641218A (en) * | 2012-07-20 | 2015-05-20 | 德尔格安全股份两合公司 | Gas measurement system |
| CN106053446A (en) * | 2016-04-20 | 2016-10-26 | 博华康生（北京）科技有限公司 | Portable gas concentration detecting device and detecting method |
| CN111328372A (en) * | 2019-01-17 | 2020-06-23 | 理研计器株式会社 | Composition analysis device and composition analysis method |
| US11193917B2 (en) | 2019-01-17 | 2021-12-07 | Riken Keiki Co., Ltd. | Composition analysis apparatus and composition analysis method |
-
2004
- 2004-11-12 CN CN 200480033675 patent/CN1882832A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104641218A (en) * | 2012-07-20 | 2015-05-20 | 德尔格安全股份两合公司 | Gas measurement system |
| US10801965B2 (en) | 2012-07-20 | 2020-10-13 | Dräger Safety AG & Co. KGaA | Gas measurement system |
| CN103110407A (en) * | 2013-03-07 | 2013-05-22 | 北京捷迈德医药科技有限公司 | Olfactory sensation test card and olfactory sensation test method |
| CN106053446A (en) * | 2016-04-20 | 2016-10-26 | 博华康生（北京）科技有限公司 | Portable gas concentration detecting device and detecting method |
| CN111328372A (en) * | 2019-01-17 | 2020-06-23 | 理研计器株式会社 | Composition analysis device and composition analysis method |
| US11193917B2 (en) | 2019-01-17 | 2021-12-07 | Riken Keiki Co., Ltd. | Composition analysis apparatus and composition analysis method |
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