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Kit capable of quickly detecting formaldehyde in air

A kit and formaldehyde technology, applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problem of inconspicuous color scale, and achieve obvious color scale differences and environmental protection. Less noise and improved sensitivity

Inactive Publication Date: 2012-07-11
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

Overcome the lack of obvious color scale of AHMT colorimetry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Cut a 0.5cm×3.0cm filter cloth strip, soak one end in 3-methyl-2-benzothiazolinone hydrazone hydrochloride hydrate aqueous solution with a concentration of 0.05mol / L, take it out and dry it after 10min , the test card is obtained, and the loading capacity of the prepared formaldehyde reactant is 1.5mg / cm 2 test card.

Embodiment 2

[0024] Cut a 0.5cm×3.0cm filter cloth strip, soak one end in 3-methyl-2-benzothiazolinone hydrazone hydrochloride hydrate aqueous solution with a concentration of 0.05mol / L, take it out and dry it after 10min ; Then add 0.05mol / L 3-methyl-2-benzothiazolinone hydrazone hydrochloride aqueous solution dropwise to the test card, and dry it at a temperature not higher than 60°C; repeat the dropwise addition, Dry twice, that is, the loading capacity of the formaldehyde reactant is 5.5mg / cm 2 test card.

Embodiment 3

[0026] Cut a 1m×1m piece of filter cloth, and use a high-pressure spray gun to evenly spray the aqueous solution of 3-methyl-2-benzothiazolinone hydrazone hydrochloride hydrate with a concentration of 0.01mol / L on the filter cloth at a temperature not higher than 60 Dry quickly with air blowing at a temperature of ℃, then use a high-pressure spray gun to spray 3-methyl-2-benzothiazolinone hydrazone hydrochloride hydrate aqueous solution with a concentration of 0.01mol / L on the filter cloth, and dry it with air blowing , and then cut into the required size according to the needs, that is, the test card.

[0027] Repeated spraying can also increase the amount of 3-methyl-2-benzothiazolinone hydrazone hydrochloride hydrate aqueous solution loaded on the test card, and the test card produced in this way has more uniform load and higher production efficiency.

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Abstract

The invention discloses a kit capable of quickly detecting formaldehyde in the air on the spot. The kit can semiquantitatively and quickly detect the pollution concentration of the formaldehyde in the air. The kit consists of a test card loaded with a formaldehyde reactant, a color development initiator and a colorimetric card. The formaldehyde reactant is a 3-methyl-2-benzothiazolinonehydrazone hydrochloride hydrate which can react with the formaldehyde; the color development initiator is an acid solution containing ferric ions; and each level on the colorimetric card is marked with a corresponding formaldehyde concentration value. The kit can be used for detecting the volatilization of the formaldehyde of furniture or decorative materials, and can also detect the concentration of the formaldehyde in the air. The invention has the advantages that; the method is quick, sensitive, little in interference, convenient to operate and low in cost.

Description

technical field [0001] The invention relates to a kit for quickly detecting formaldehyde in the air. More specifically, it can be used to detect the volatilization of formaldehyde in furniture or decoration materials, and can also detect the concentration of formaldehyde in the air. It is an on-site semi-quantitative detection of formaldehyde concentration. New product. Background technique [0002] Formaldehyde is the simplest aldehyde. It is a colorless, irritating gas that is easily soluble in water. It is volatile. Formaldehyde has become the most important factor of indoor air pollution and has attracted public attention in recent years. Indoor formaldehyde mainly comes from decoration materials and furniture, smoking, fuel burning and cooking. Formaldehyde has a strong stimulating effect on the skin and mucous membranes, and high concentrations of formaldehyde are toxic to the nervous system, immune system, and liver. Formaldehyde also has teratogenic and carcinogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 范海明张琴陈兆文路玮张浩周钧
Owner 邯郸派瑞电器有限公司
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