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, material analysis through observation of the influence of chemical indicators, and analysis using chemical indicators. Complicated steps and other problems, to achieve the effect of simple operation steps and simple processing

Inactive Publication Date: 2006-05-17
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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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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Effect test

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 invention relates to a test paper for rapid determination of formaldehyde in the air, which comprises a packaging bag, a formaldehyde testing paper and a color comparison card in the bag, an opening in the middle of the packaging bag, and an adhesive handle on the back of the packaging bag. The test paper is impregnated with a color developing agent mixed with 4-amino-3-hydrazine-5-thiol-1,2,4-triazole solution, potassium hydroxide solution and potassium periodate solution, and the colorimetric Each color scale on the card indicates the concentration value of formaldehyde, and gives the highest concentration allowed by the national standard. The present invention judges the concentration of formaldehyde in the air through the color change of the test paper caused by exposing the test paper to the air. secondary pollution.

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 Patents(China)
IPC IPC(8): G01N31/22G01N21/78
Inventor 杨骥贾金平王亚林
Owner SHANGHAI JIAOTONG UNIV
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