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Fast detecting test. paper for formaldhyde in air

A technology for rapid determination of formaldehyde, which is applied in the direction of analyzing materials through chemical reactions and analyzing materials through observation of the impact on chemical indicators, can solve the problems of difficulty in popularization, high cost of determination, and complicated determination steps, etc., to achieve The effect of simple processing and simple operation steps

Inactive Publication Date: 2005-01-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the determination steps are complicated, professional personnel are required to operate, and the determination cost is high, so it is not easy to popularize

Method used

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  • Fast detecting test. paper for formaldhyde in air
  • Fast detecting test. paper for formaldhyde in air

Examples

Experimental program
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Embodiment Construction

[0016] The technical solution of the present invention will be described in further detail below through specific examples.

[0017] Formaldehyde rapid determination test paper structure in the air of the present invention is as follows figure 1 As shown, it includes a packaging bag 2, a test paper 4 for measuring formaldehyde in the packaging bag, an unsealing opening 3 is provided in the middle of the packaging bag, and an adhesive handle 1 is arranged on the back of the packaging bag.

[0018] Formaldehyde determination test paper 4 adopts commonly used filter paper or white cotton cloth, and the test paper is soaked with a color developing agent mixed by AHMT solution, potassium hydroxide (KOH) solution and potassium periodate (KIO4) solution.

[0019] The specific preparation method of formaldehyde test paper 4 is as follows: respectively prepare 1% AHMT solution, 2M KOH solution and 0.2M KIO4 solution in weight ratio, take 10 milliliters of AHMT solution, 2 milliliters o...

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Abstract

The invented product includes packaged bag, test paper and color grade. There is an opening in mid part of the packaged bag, and pasted handle is in back of the bag. test paper is saturated by developer mixed from 4- amido-3- hydrazino-5-thiol group-1, 2, 4- triazole solution, potassium hydroxide solution and potassium periodate. color grade marks concentration values, and allowed maximum concentration value issued in national standard. Color of test paper is changed caused by formaldehyde in air. Features are: simple, safe, sensitive, and accuracy.

Description

technical field [0001] The invention relates to a test paper for rapid determination of formaldehyde in the air, which is used for one-time semi-quantitative on-site analysis and determination of formaldehyde concentration in indoor air and formaldehyde volatilized near new furniture and decoration materials. It is a new product for on-site analysis and testing. Background technique [0002] Formaldehyde (HCHO) is also known as wood aldehyde or acetaldehyde, and 40% formaldehyde solution is called formalin solution and is widely used as a preservative. Formaldehyde is widely used in the chemical industry, and the products synthesized from it are widely used in households, such as latex paint in furniture, flame retardant in flooring, various boards in building materials, preservatives, paints, disinfection products, etc. However, if excessive use causes the formaldehyde content in the air to exceed the standard, it will cause serious harm to health. [0003] Conventional m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 杨骥贾金平王亚林
Owner SHANGHAI JIAO TONG UNIV
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