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Test paper for quickly detecting formaldehyde in air

A technology for detecting test paper and test paper, applied in the field of chemical analysis and detection, can solve the problems of time-consuming and high cost, and achieve the effects of improving sensitivity, shortening test time, increasing stability and storage life

Active Publication Date: 2012-02-15
邯郸派瑞电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires professionals and professional equipment for analysis and testing, and it takes a long time and costs a lot. The concentration of formaldehyde in a test is as high as 300-500 yuan, which is not suitable for ordinary people's families.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Cut a filter paper strip with a size of 0.5cm×4cm, soak it in a solution of diethylenetriamine with a concentration of 0.2mol / L, take it out after 10min and dry it; then add a concentration of 0.05mol to the surface / L AHMT hydrochloric acid solution, and then dry to obtain test paper. When in use, drop a drop of 0.5mol / L sodium hydroxide solution and place it in the environment to be tested with a concentration of 0.15mg / m 3 , After 2 minutes, the color begins to develop, and after 10 minutes, it is compared with the color card, showing slight pollution.

Embodiment 2

[0018] Cut a filter paper strip with a size of 0.5cm×4cm, soak it in the nitric acid solution of AHMT with a concentration of 0.1mol / L, take it out after half an hour, and dry it; then soak it in a solution with a concentration of 0.02mol / L L of sodium sulfite solution, take it out after 5 minutes, and then dry it to obtain test paper. When in use, drop a drop of 1.0mol / L potassium hydroxide solution and place it in the environment to be tested with a concentration of 1.2mg / m 3 , After 10s, the color begins to develop, and after 10 minutes, it is compared with the color comparison card, showing serious pollution.

Embodiment 3

[0020] Cut a strip of water-absorbent cloth with a size of 1cm×5cm, soak it in the hydrochloric acid solution of AHMT with a concentration of 0.05mol / L, take it out after 1h, and dry the floating liquid on the surface with filter paper; Triethylenetetramine solution with a concentration of 0.01mol / L was added dropwise, and after drying, the test paper was obtained. When in use, drop a drop of 0.5mol / L sodium hydroxide solution and place it in the environment to be tested with a concentration of 0.05mg / m 3 , After 10 minutes, compared with the color comparison card, it shows no formaldehyde.

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Abstract

The invention discloses test paper for quickly detecting formaldehyde in air. The test paper consists of test paper with a formaldehyde catching agent and a color developing agent, a color development initiating agent and a color comparison card, wherein the color developing agent is 4-amino-3-hydrazine-5-sulfydryl-1,2,4-triazole; and each gram of test paper contains 1 to 100mg of formaldehyde catching agent and 1 to 100mg of color developing agent. When the test paper is used, the color development initiating agent is dripped onto the test paper with the formaldehyde catching agent and the color developing agent, and the test paper is placed in air to be detected and then is compared with the color comparison card within 1 to 20 minutes so as to read a formaldehyde concentration value out. The test paper is quick and sensitive, is easy and convenient to operate, has low cost, does not need special personnel during detection and can be conveniently used by people in families.

Description

technical field [0001] The invention relates to a test paper for rapid detection of formaldehyde in the air, which can quickly detect the content of low-concentration formaldehyde in the air semi-quantitatively, and belongs to the field of chemical analysis and detection. Background technique [0002] At room temperature, formaldehyde is a colorless and soluble irritating gas that can be absorbed through the respiratory tract and combined with biological cell proteins. It is a highly toxic protoplasmic substance and is listed as one of the carcinogens by the International Cancer Institute. Ranked second in the control of highly toxic substances. The lot of documents record, formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects. When its concentration reaches 0.06-0.07 mg / m3 in every cubic meter of air, children will have slight asthma; when it reaches 0.1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/22
Inventor 管迎梅陈兆文范海明周钧翟密橙张琴张浩
Owner 邯郸派瑞电器有限公司
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