CN103698324A - Air formaldehyde self testing kit - Google Patents
Air formaldehyde self testing kit Download PDFInfo
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- CN103698324A CN103698324A CN201310611950.3A CN201310611950A CN103698324A CN 103698324 A CN103698324 A CN 103698324A CN 201310611950 A CN201310611950 A CN 201310611950A CN 103698324 A CN103698324 A CN 103698324A
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Abstract
The invention discloses an air formaldehyde self testing kit, including an absorbent, an acidifying agent, a diluent, a chromogenic agent and a colorimetric card. The absorbent is a phenol reagent, the acidifying agent is phosphorus pentoxide, the diluent is pure water, and the chromogenic agent is ammonium ferric sulfate. The self testing kit is suitable for household usage, and is economical, convenient, accurate and quick in detection of the indoor formaldehyde content.
Description
Technical field
The present invention relates to the technical field of air detection formaldehyde, espespecially a kind of air formaldehyde box of testing oneself.
Background technology
Formaldehyde is a kind of protoplasm poisonous substance that destroys biological cell protein, under usual conditions, pure formaldehyde is a kind of colourless gas with stinkpot, can cause damage to people's skin, respiratory tract and internal organ, its extent of injury and its aerial concentration and the length of duration of contact are closely related.Formaldehyde also has teratogenesis, carcinogenesis, the people of Long Term Contact formaldehyde, suffer from the probability of nasal cavity, oral cavity, nasopharynx, throat, skin and alimentary tract cancer higher than common people, the low amount formaldehyde of mankind's Long Term Contact can cause chronic respiratory disease, women's paramenia, pregnancy syndrome, cause that neonate's physique reduces, chromosome abnormality, even causes nasopharyngeal carcinoma, and the formaldehyde of high concentration is all toxic to nervous system, immune system, liver etc.Formaldehyde is teratogenesis, the carcinogen that the World Health Organization (WHO) confirms, Long Term Contact will cause gene mutation, is to ranked second position in the preferential list of controlling of China's toxic chemical.
China < < indoor air quality monitoring technical manual > > (HJ/ T167-2004) recommend adoption AHMT spectrophotometric method, phenol reagent spectrophotometric method, diacetone spectrophotometric method, vapor-phase chromatography and electrochemical sensor method are as the assay method of formaldehyde.Wherein to have selectivity good for vapor-phase chromatography, the feature that disturbing factor is little, but gas chromatograph somewhat expensive; AHMT spectrophotometric method antijamming capability is strong, and sensitivity is higher, but operation requirements is strict; Diacetone spectrophotometric method is noiseless, easy to operate to the phenol coexisting and ethanol etc., favorable reproducibility, but sensitivity is lower; Electrochemical sensor method is easy and simple to handle and quick, but the price of formaldehyde sensor is generally more expensive.
Summary of the invention
Technical matters to be solved by this invention is to provide economy that a kind of applicable family uses, convenient, the air formaldehyde box of testing oneself accurately and rapidly, it is by reappearing and optimizing national standard Law < < public place method for determining formaldehyde in air phenol reagent spectrophotometric method > > (GB/T18204.26-2000), to the best proportioning of the constituent of the box that obtains testing oneself.
For solving the problems of the technologies described above, technical solution of the present invention is:
The air formaldehyde box of testing oneself, comprises absorbing agent, acidulant, thinning agent, developer and colorimetric card; Described absorbing agent is phenol reagent, and described acidulant is phosphorus pentoxide, and described thinning agent is pure water, and described developer is ammonium ferric sulfate.
Described absorbing agent and the described mixed mass concentration of thinning agent pure water are 0.03mg/ml.
Described phosphorus pentoxide is mixed in after described thinning agent, and its mass concentration is 25g/L.
Described developer is that mass concentration is 1.5% ammonium ferric sulfate.
In described phenol reagent, be added with acidulant, this acidulant is phosphorus pentoxide powder, and acidulant plays drying agent effect simultaneously, keeps reagent dry.
Described colorimetric card preparation process is: described absorbing agent and acidulant are diluted by described thinning agent, with the formaldehyde of variable concentrations, react with the absorbing agent after above-mentioned dilution, by reactant liquor with described chromogenic reagent, according to the degree of colour developing preparation standard colorimetric card.
Adopt after such scheme, the present invention adopts phenol reagent as absorbing agent, adopts phosphorus pentoxide to carry out acidifying, adopts ammonium ferric sulfate as developer, and equally by mentioned reagent preparation standard colorimetric card, more accurate, quick, convenient for the detection of indoor formaldehyde concentration.
More specifically, tool of the present invention has the following advantages:
1, highly sensitive: adopt phenol reagent, the acidulant of best proportioning, highly sensitive with formaldehyde reaction, be more conducive to detect, more quick, convenient.
2, cost is low: the phenol reagent price in this testing process is the most expensive, the published several kit patented technology of comparing, and the phenol reagent addition of this method is minimum.
3, adopt acidulant: the need of testing process make solution keep acidifying state.In published detection method, generally use sulfuric acid, nitric acid or hydrochloric acid etc. to carry out acidifying, process is complicated.This method adopts phenol reagent to mix with phosphorus pentoxide, and phosphorus pentoxide, ensureing that phenol reagent is stable in storage process at ordinary times, serves as drying agent; After water-soluble in absorption process and process color, solution acidifying, makes that absorption process is rapid, chromogenic reaction is stable carries out.Above process makes kit medicament reasonable mixture ratio of the present invention, and process is simple, favorable reproducibility.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of standard color comparison card of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Disclosed is a kind of air formaldehyde box of testing oneself, it comprises absorbing agent, acidulant, thinning agent, developer and colorimetric card.The principle of this box of testing oneself is to utilize airborne formaldehyde to react with MBTH (abbreviation phenol reagent) to generate piperazine, piperazine is formed blue-green compound by ferric ion oxidation in acid solution, the shade of this compound is directly proportional to the content of formaldehyde, after developing time 30min, pass through colorimetric assay.This principle is according to national standard Law < < public place method for determining formaldehyde in air phenol reagent spectrophotometric method > > (GB/T18204.26-2000).
Described absorbing agent is selected phenol reagent, in order to prevent airborne moisture effects measurement result, can in absorbing agent phenol reagent, add phosphorus pentoxide as drying agent, and be positioned in a box simultaneously, and sealing is preserved.
Described acidulant is phosphorus pentoxide, and it shows acid after being dissolved in water.
Described thinning agent is selected pure water.
In described testing cassete, the phenol reagent of configuration is 0.3mg, and thinning agent pure water is 10ml, and during test, mixed solution is that mass concentration is the phenol reagent solution of 0.03mg/ml.
Determining of described acidulant, developer: formed blue-green compound by ferric ion oxidation according to the piperazine of formaldehyde and phenol reagent generation in acid solution, and use respectively salt acidifying ammonium ferric sulfate solution, sulphation ammonium ferric sulfate, nitrification ammonium ferric sulfate and phosphorus pentoxide solution acidifying ammonium ferric sulfate, according to color developing effect, determine that best color condition is that phosphorus pentoxide mass concentration is 25g/L, ammonium ferric sulfate is mass concentration 1.5%.。
In kit, acidulant adopts phosphorus pentoxide 250mg, is dissolved in 10ml water.
Developer adopts mass concentration 1.5% ammonium ferric sulfate
The preparation of described colorimetric card: utilize above-mentioned selected absorbing agent, acidulant, thinning agent, the developer colorimetric card that settles the standard.First described absorbing agent and acidulant being diluted to mass concentration by described thinning agent is 0.03mg/ml, with concentration of formaldehyde be respectively 0.05,0.10,0.20,0.40,0.60,0.80,1.20mg/m
3formaldehyde react with the absorbing agent after above-mentioned dilution, by reactant liquor with described chromogenic reagent, according to colour developing degree preparation standard colorimetric card, as shown in Figure 1.
Testing process of the present invention is: first absorbing agent, acidulant are carried out to a certain proportion of dilution with thinning agent, then be placed in indoor that wish detects, place a period of time, make phenol reagent absorb airborne formaldehyde, reaction generates piperazine, adds afterwards developer, and developing time is 30min left and right, observe color and contrast judgement indoor formaldehyde content with colorimetric card.According to the hygienic standard > > (GB/T 18883-2002) of formaldehyde in State Standard of the People's Republic of China < < indoor air, stipulate: in indoor air, the maximum permissible concentration of formaldehyde is 0.08 mg/m
3.If colour developing surpasses colorimetric card left side secondary series, can think formaldehyde in room.
The test oneself test result of box test result and GB phenol reagent spectrophotometric method of air formaldehyde of the present invention is carried out to contrast experiment:
Use respectively air formaldehyde that GB phenol reagent spectrophotometric method and the present invention the work out box formula of testing oneself, in the room of three different concentration of formaldehyde, synchronously carry out the measurement of air formaldehyde concentration.
The formaldehyde concentration of formaldehyde that result that box obtains obtains three rooms according to colorimetric card comparison reading of testing oneself is respectively: 0.05 mg/m
3, 0.2 ~ 0.4 mg/m
3, 0.2 mg/m
3.
And record the absorbance of the chromophoric solution between three rooms according to National Standard Method, then according to air formaldehyde concentration computing formula C=A*T/V
0conversion obtains, and the concentration of formaldehyde in three rooms is respectively 0.05mg/m
3, 0.242 mg/m
3, 0.218 mg/m
3.
The result of two kinds of methods of contrast, visible, the test oneself result of box of air formaldehyde, meets the requirement of half-quantitative detection, and the measurement result of its result and National Standard Method is close, has its science.The method provides a kind of comparatively easy self-testing method.
The above, be only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, thus variation or the modification in every case according to claim of the present invention and instructions, done, within all should belonging to the scope that patent of the present invention contains.
Claims (6)
1. the air formaldehyde box of testing oneself, is characterized in that: comprise absorbing agent, acidulant, thinning agent, developer and colorimetric card; Described absorbing agent is phenol reagent, and described acidulant is phosphorus pentoxide, and described thinning agent is pure water, and described developer is ammonium ferric sulfate.
2. the air formaldehyde according to claim 1 box of testing oneself, is characterized in that: described absorbing agent and the described mixed mass concentration of thinning agent pure water are 0.03mg/ml.
3. the air formaldehyde according to claim 1 and 2 box of testing oneself, is characterized in that: described phosphorus pentoxide is mixed in after described thinning agent, and its mass concentration is 25g/L.
4. the air formaldehyde according to claim 3 box of testing oneself, is characterized in that: described developer is that mass concentration is 1.5% ammonium ferric sulfate.
5. the air formaldehyde according to claim 4 box of testing oneself, is characterized in that: in described phenol reagent, be added with described acidulant, and sealing is preserved simultaneously.
6. the air formaldehyde according to claim 4 box of testing oneself, it is characterized in that: described colorimetric card preparation process is: described absorbing agent and acidulant are diluted by described thinning agent simultaneously, with the formaldehyde of variable concentrations, react with the absorbing agent after above-mentioned dilution, by reactant liquor with described chromogenic reagent, according to colour developing degree preparation standard colorimetric card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611950.3A CN103698324B (en) | 2013-11-27 | 2013-11-27 | Air formaldehyde self testing kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611950.3A CN103698324B (en) | 2013-11-27 | 2013-11-27 | Air formaldehyde self testing kit |
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| Publication Number | Publication Date |
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| CN103698324A true CN103698324A (en) | 2014-04-02 |
| CN103698324B CN103698324B (en) | 2017-06-06 |
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| CN201310611950.3A Active CN103698324B (en) | 2013-11-27 | 2013-11-27 | Air formaldehyde self testing kit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390959A (en) * | 2014-11-06 | 2015-03-04 | 常熟市苏常工程质量检测有限公司 | Method for detecting content of formaldehyde in house |
| CN104436985A (en) * | 2014-11-18 | 2015-03-25 | 苏州东辰林达检测技术有限公司 | Formaldehyde absorbing material and preparation method thereof |
| CN105021597A (en) * | 2014-04-30 | 2015-11-04 | 张晓咪 | Air formaldehyde detection device |
| CN105352950A (en) * | 2015-10-24 | 2016-02-24 | 佛山市奥朗科技有限公司 | Detection medicament and method for rapid detection of formaldehyde content in air |
| CN107525801A (en) * | 2017-07-17 | 2017-12-29 | 贵州金洋检测工程有限公司 | A kind of formaldehyde in air content assaying method |
| CN108514867A (en) * | 2018-04-18 | 2018-09-11 | 北京化工大学 | A kind of preparation of the sodium alginate gel ball of detection formaldehyde |
| CN111504991A (en) * | 2020-04-30 | 2020-08-07 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Kit for detecting formaldehyde gas |
| CN112858279A (en) * | 2021-02-04 | 2021-05-28 | 江苏中烟工业有限责任公司 | Method for rapidly determining residual amount of formaldehyde in water-based adhesive |
| CN113125426A (en) * | 2021-04-07 | 2021-07-16 | 山西工程职业学院 | Use method of portable accurate formaldehyde analysis box |
| CN113884482A (en) * | 2020-07-02 | 2022-01-04 | 海南光宇生物科技有限公司 | Formaldehyde self-testing box with biological cellulose membrane as reagent carrier |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021597A (en) * | 2014-04-30 | 2015-11-04 | 张晓咪 | Air formaldehyde detection device |
| CN104390959A (en) * | 2014-11-06 | 2015-03-04 | 常熟市苏常工程质量检测有限公司 | Method for detecting content of formaldehyde in house |
| CN104436985A (en) * | 2014-11-18 | 2015-03-25 | 苏州东辰林达检测技术有限公司 | Formaldehyde absorbing material and preparation method thereof |
| CN105352950A (en) * | 2015-10-24 | 2016-02-24 | 佛山市奥朗科技有限公司 | Detection medicament and method for rapid detection of formaldehyde content in air |
| CN107525801A (en) * | 2017-07-17 | 2017-12-29 | 贵州金洋检测工程有限公司 | A kind of formaldehyde in air content assaying method |
| CN108514867A (en) * | 2018-04-18 | 2018-09-11 | 北京化工大学 | A kind of preparation of the sodium alginate gel ball of detection formaldehyde |
| CN111504991A (en) * | 2020-04-30 | 2020-08-07 | 军事科学院军事医学研究院环境医学与作业医学研究所 | Kit for detecting formaldehyde gas |
| CN113884482A (en) * | 2020-07-02 | 2022-01-04 | 海南光宇生物科技有限公司 | Formaldehyde self-testing box with biological cellulose membrane as reagent carrier |
| CN112858279A (en) * | 2021-02-04 | 2021-05-28 | 江苏中烟工业有限责任公司 | Method for rapidly determining residual amount of formaldehyde in water-based adhesive |
| CN113125426A (en) * | 2021-04-07 | 2021-07-16 | 山西工程职业学院 | Use method of portable accurate formaldehyde analysis box |
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