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Method for rapidly screening and detecting benzotriazole ultraviolet absorbents in textiles

A technology of benzotriazoles and ultraviolet absorbers, which can be used in measurement devices, instruments, scientific instruments, etc., can solve the problems of cumbersome and time-consuming processes, long pre-processing time, etc., achieve high sensitivity, improve product quality, and promote green The effect of sustainable development

Active Publication Date: 2021-03-16
SHANGHAI INST OF QUALITY INSPECTION & TECHN RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of long pretreatment time in existing detection methods, using organic reagents as extraction solvents, cumbersome and time-consuming process, etc., and provides a rapid detection method for benzotriazole ultraviolet absorbers in textiles, without pretreatment of samples , can be analyzed after weighing, and the sensitivity and accuracy of the method are high, and there is no organic solvent re-pollution, and the content of four kinds of benzotriazole UV absorbers (see Table 1) contained in textiles can be quickly qualitative and semi-quantitative detection

Method used

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  • Method for rapidly screening and detecting benzotriazole ultraviolet absorbents in textiles
  • Method for rapidly screening and detecting benzotriazole ultraviolet absorbents in textiles
  • Method for rapidly screening and detecting benzotriazole ultraviolet absorbents in textiles

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Using acetonitrile as a solvent, weigh the standards of 4 kinds of benzotriazole UV absorbers respectively, configure them into a mixed stock solution with a concentration of 1050 μg / mL, and then dilute them into benzotriazole with a concentration of 100 μg / mL Mixed working solution of UV absorbers; pipette 1 μL, 2 μL, 5 μL, 8 μL, 10 μL of mixed working solutions of benzotriazole UV absorbers into the sample cup of the thermal cracker, evaporate the solvent to The absolute contents of each benzotriazole UV absorber in the sample cup are: 100ng, 200ng, 500ng, 800ng, 1000ng;

[0038] (2) Take a textile sample with blue and white stripes, the textile fiber composition is 88% nylon / 12% spandex, cut it into pieces or powder with a particle size of 0.5mm or less with scissors and mix evenly, weigh 0.50mg of the mixed sample The sample was placed in the bottom of the sample cup of another pyrolyzer.

[0039] (3) Take an appropriate amount of silanized glass wool and put i...

Embodiment 2

[0046] (1) Using methanol as a solvent, weigh the standards of 4 kinds of benzotriazole UV absorbers respectively, configure them into a mixed stock solution with a concentration of 1015 μg / mL, and then dilute them into benzotriazole with a concentration of 100 μg / mL Mixed working solution of UV absorbers; pipette 1 μL, 2 μL, 5 μL, 8 μL, 10 μL of mixed working solutions of benzotriazole UV absorbers into the sample cup of the thermal cracker, evaporate the solvent to The absolute contents of each benzotriazole UV absorber in the sample cup are: 100ng, 200ng, 500ng, 800ng, 1000ng;

[0047] (2) Take a black coated textile sample (the coating is inseparable). The fiber component of the sample is 100% polyester. Use scissors to cut it into fragments or powders with a particle size below 0.5mm and mix them evenly. Weigh 0.50mg The sample is mixed and placed in the bottom of another pyrolyzed sample cup.

[0048] (3) Take an appropriate amount of silanized glass wool and put it int...

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Abstract

The invention provides a method for rapidly detecting benzotriazole ultraviolet absorbents in textiles. The method comprises the following steps of: (1) crushing a sample to be detected into fragmentswith the particle size of less than 0.5 mm in a physical mode, uniformly mixing the fragments to be used as a test sample, weighing a proper amount of the test sample, and placing the test sample atthe bottom part of a sample cup of a thermal cracker; (2) putting a proper amount of silanized glass wool into the sample cup of of the thermal cracker, then putting the sample cup of the thermal cracker into thermal cracking equipment, and carrying out thermal cracking-gas chromatography-mass spectrometry analysis; and (3) comparing the retention time and a peak area of each benzotriazole ultraviolet absorbent in the sample to be detected and the standard sample, and carrying out qualitative and / or semi-quantitative detection. The method can accurately and efficiently detect whether the textile contains four benzotriazole ultraviolet absorbents at the same time, the sample does not need chemical solvent extraction, the detection period is shortened to the maximum extent, the sample weighing amount is small, and the sensitivity of the method is high.

Description

technical field [0001] The invention relates to the field of textile detection, in particular to a rapid detection method for benzotriazole ultraviolet absorbers in textiles. Background technique [0002] As a common UV absorber, benzotriazoles are widely used in fabrics, cosmetics and other fields. Textiles treated with benzotriazole substances can not only protect human skin from excessive ultraviolet rays, but also avoid ultraviolet catalyzed reactions that destroy polymer structures, and improve the sunscreen, weather resistance, and anti-corrosion properties of dyes, coatings, and fibers on fabrics. Aging ability. [0003] However, studies have shown that: 2-(3,5-di-tert-butyl-2-hydroxyphenyl)benzotriazole (UV 320), 2-(3,5-di-tert-butyl-2-hydroxyphenyl)- 5-chlorobenzotriazole (UV 327), 2-(3,5-di-tert-amyl-2-hydroxyphenyl)benzotriazole (UV 328), 2-(3-sec-butyl-5- Benzotriazole UV absorbers such as tert-butyl-2-hydroxyphenyl) benzotriazole (UV 350) are persistent, bioa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/72G01N30/86
CPCG01N30/02G01N30/06G01N30/72G01N30/8675G01N2030/067
Inventor 赵海浪包海峰朱峰谭玉静曹石淼周兆懿王麟庄园园
Owner SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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