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Formaldehyde detection kit and preparation method thereof

A detection kit and kit technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of cumbersome operation, long detection time, and affecting the stability of detection results. and sensitivity issues

Inactive Publication Date: 2014-04-30
杨晓莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Patent Publication No. 1437020A, Chinese Patent Grant No. 2572399Y, and 2577278Y disclose several formaldehyde detection methods. There are several problems in these methods: 1) the detection time is too long, and it needs to be exposed in the air for 30 minutes to several hours, 2) cumbersome to operate, 3) high manufacturing cost
Because 4-amino-3-hydrazine-5-mercapto-1,2,4-triazolene (abbreviated as AHMT) is unstable under alkaline conditions, it affects the stability and sensitivity of the detection results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Prepare a solution containing 2.4H potassium hydroxide and 0.05M potassium metabisulfite, completely immerse the filter paper in the above solution, take it out after 2 minutes, dry it at 80°C, cut the filter paper into small rectangular pieces of 3 cm X 0.3 cm, This is the support, hereinafter referred to as the test paper, for standby. Prepare 0.5M hydrochloric acid solution, weigh 0.5 g of AHMT, dissolve 0.5 g of AHMT with as little (about 48 ml) of 0.5 M hydrochloric acid solution, add distilled water to 100 ml, this is the color developer, and pack the color developer in small openings plastic dropper. Put the test paper in an environment with known formaldehyde concentration, expose it for half an hour, then drop a drop of color developer on one end of the test paper, develop the color for 7-10 minutes, and make a color comparison card according to the color of the color area of ​​the test paper and the corresponding formaldehyde concentration. Put the test paper...

example 2

[0025] Prepare a solution containing 2.6M potassium hydroxide and 0.3M potassium metabisulfite, completely immerse the absorbent paper in the above solution, take it out after 2 minutes, dry it at 80°C, and cut the absorbent paper into a rectangle of 4 cm X 0.3 cm Small piece, this is the support, spare.

[0026] The configuration of the chromogen and the application of the kit are the same as in Example 1.

example 3

[0027] Example 3, prepare a solution containing 2.1H potassium hydroxide and 0.02M potassium metabisulfite, and completely soak the filter paper in the above solution

[0028] After 2 minutes, take it out, dry it at 80°C, and cut the filter paper into 4 cm X 0.3 cm rectangular pieces, which are used as supports and set aside. The configuration of the chromogen and the application of the kit are the same as in Example 1.

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Abstract

The invention relates to a formaldehyde detection kit and a preparation method thereof. The formaldehyde detection kit comprises a holder with a strong alkali and a formaldehyde capture agent, a developer and a colourimetric card. The holder includes, but is not limited to, a filter paper. The formaldehyde capture agent is a reagent which can bind with formaldehyde and provide formaldehyde for 4-amino-3-hydrazino-5-mercapto-1,2,4-triazol (AHMT). The developer is an acidic aqueous solution of AHMT. Each color level of the colourimetric card represents a corresponding formaldehyde concentration value and a formaldehyde volatilization amount. In use, the holder with the strong alkali and the formaldehyde capture agent is exposed in the environment to be detected, after exposure for a certain time, the developer is dropwisely put on the holder, and after several minutes, the color of the holder is compared with colors of the colourimetric card and a formaldehyde concentration or a formaldehyde volatilization amount is determined. Through cooperation with a container, the formaldehyde detection kit can be used for detecting a formaldehyde volatilization amount of furniture or decorative materials and for detecting a formaldehyde concentration of air.

Description

Technical field: [0001] A formaldehyde detection kit and a preparation method thereof are used for on-site semi-quantitative analysis and detection of formaldehyde volatilization in furniture and decoration materials, and can also be used for detection of formaldehyde concentration in the air. It is a new product for on-site analysis and detection of formaldehyde. Background technique: [0002] Formaldehyde is a colorless and irritating gas that is easily soluble in water and is harmful to health. It has attracted public attention in recent years. The state stipulates that the formaldehyde content in indoor air should not exceed 0.08mg. Rapid detection of formaldehyde has good social significance for controlling formaldehyde pollution and protecting people's health. [0003] Methods for detecting formaldehyde have been reported in patent literature. Chinese Patent Publication No. 1437020A, Chinese Patent Grant No. 2572399Y, and 2577278Y disclose several formaldehyde detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 杨晓莉
Owner 杨晓莉
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