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Method and device for rapidly detecting contents of formaldehyde in textiles

Pending Publication Date: 2019-04-09
TUV RHEINLAND SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] These methods are quantitative analysis of formaldehyde, the required test time is long, and the test process is cumbersome.

Method used

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  • Method and device for rapidly detecting contents of formaldehyde in textiles
  • Method and device for rapidly detecting contents of formaldehyde in textiles
  • Method and device for rapidly detecting contents of formaldehyde in textiles

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A rapid detection method for formaldehyde content in textiles, comprising the following steps: taking 41.7 parts by weight of 95% sulfuric acid and 38.3 parts by weight of tertiary water to prepare sulfuric acid aqueous solution, adding 1 part by weight of phenylhydrazine and 19 parts by weight of tertiary water to prepare the first One solution; 10 parts by weight of anhydrous ferric chloride is dissolved in 90 parts by weight of water to prepare the second solution; white absorbent paper is placed on the glass vessel, and the textile fabric to be tested is placed on the white absorbent paper; Add 3 drops of the first solution to the textile fabric to be tested, soak the textile fabric to be tested, and then add 3 drops of the second solution to the soaked part of the fabric with a dropper; after waiting for 30s, check the white absorbent paper Color change; the color is red, indicating that the formaldehyde content is above 30ppm.

Embodiment 2

[0048] A method for quickly detecting formaldehyde content in textiles, comprising the following steps: taking 35 parts by weight of 98% sulfuric acid and 35 parts by weight of tertiary water to prepare sulfuric acid aqueous solution, adding 0.5 parts by weight of phenylhydrazine and 15 parts by weight of tertiary water to prepare the second One solution; 8 parts by weight of anhydrous ferric chloride are dissolved in 92 parts by weight of water to prepare the second solution; white absorbent paper is placed on the glass vessel, and the textile fabric to be tested is placed on the white absorbent paper; Add 3 drops of the first solution to the textile fabric to be tested, soak the textile fabric to be tested, and then add 3 drops of the second solution to the soaked part of the fabric with a dropper; after waiting for 30s, check the white absorbent paper Color change; the color is red, indicating that the formaldehyde content is above 30ppm.

Embodiment 3

[0050]A rapid detection method for formaldehyde content in textiles, comprising the following steps: taking 45 parts by weight of 98% sulfuric acid and 40 parts by weight of tertiary water to prepare sulfuric acid aqueous solution, adding 1.5 parts by weight of phenylhydrazine and 20 parts by weight of tertiary water to prepare the second One solution; 12 parts by weight of anhydrous ferric chloride are dissolved in 88 parts by weight of water to prepare the second solution; white absorbent paper is placed on the glass vessel, and the textile fabric to be tested is placed on the white absorbent paper; the second solution is sucked with a syringe. For the first solution, slowly push the syringe push rod, add 0.1mL of the first solution to the textile fabric to be tested; draw the second solution with another syringe, slowly push the syringe push rod, and add 0.1mL of the second solution to the textile fabric to be tested solution; after waiting for 30s, check the color change of...

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Abstract

The invention relates to a method and device for rapidly detecting contents of formaldehyde in textiles. The method comprises the following steps of: preparing sulfuric acid water solution by 35-45 parts of sulfuric acid and 35-40 parts of water by weight, and adding 0.5-1.5 parts of phenylhydrazine and 15-20 parts of water by weight to prepare first solution; dissolving 8-12 parts of anhydrous ferric chloride by weight in 88-92 parts of water by weight to prepare second solution; placing white absorbent paper on a glassware and placing a to-be-detected textile fabric on the white absorbent paper; infiltrating the to-be-detected textile fabric by the first solution and adding the second solution to the infiltrated part of the fabric; after a certain time, checking the color change of the white absorbent paper; and if the color is red, determining that the content of formaldehyde is above 30 ppm. The device comprises the glassware, the white absorbent paper and a solution adding device,compared with the prior art, the method has the advantages of being simple, high in detection in efficiency, economic and practical.

Description

technical field [0001] The invention relates to a method for detecting formaldehyde, in particular to a method and device for rapidly detecting the content of formaldehyde in textiles. Background technique [0002] Textiles used in daily life contain free formaldehyde and released formaldehyde, and long-term contact with it will cause extremely serious harm to the human body. Textiles are in direct or indirect contact with human skin, and formaldehyde, as an environmental allergen, can cause allergic dermatitis, stains, and even skin death. Formaldehyde is the most sensitive to the irritation of the eyes. A certain concentration of formaldehyde will make the eyes red, swollen and shed tears; after the volatilized formaldehyde enters the human body with breathing, it not only has a strong stimulating effect on the respiratory organs, but also has a certain impact on the metabolism and endocrine of the human body; formaldehyde As a teratogenic substance, it can cause gene mut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 甘志云于艳丽
Owner TUV RHEINLAND SHANGHAI
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