Method for detecting banned azo dyes in printing ink, coatings and paint

A technology for banning azo and detection methods, applied in the field of detection, to achieve the effect of less demand, speeding up stratification, and reducing processes

Inactive Publication Date: 2014-11-26
广州衡创测试技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current banned azo dye test objects are mainly for leather and textil

Method used

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Embodiment Construction

[0029] In order to allow those skilled in the art to understand the present invention more clearly and intuitively, the present invention will be further described below.

[0030] A detection method for forbidden azo dyes in printing ink, coating, paint, comprises the following steps:

[0031] (1) Extraction of disperse dyes

[0032] (1.1) Dry the ink and paint at 105°C and crush them as samples for later use;

[0033] (1.2) Weigh 1.0g sample into a 50ml screw cap test tube, add 25mL methanol into the test tube, tighten the cap of the test tube, place in a 40°C water bath ultrasonic, and extract by ultrasonic for 60min;

[0034] (1.3) Take out the test tube and cool it to room temperature, filter the extract into a 150ml round-bottom flask, then rinse the test tube with 5ml of methanol, and filter the eluate into the round-bottom flask as well, if the filtrate is not clear, filter again until the filtrate is until clarified;

[0035] (1.4) Rotate the filtrate to nearly dryn...

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PUM

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Abstract

The invention provides a method for detecting banned azo dyes in printing ink, coatings and paint. The method comprises the following steps: performing reduction and decomposition on a sample in a sodium citrate buffer solution medium in the presence of sodium hydrosulfite to generate possible banned aromatic amine, then extracting aromatic amine from an extracting solution by a liquid-liquid extraction method, and detecting by GCMS with a mass selection detector. According to the method, methyl alcohol is used to extract disperse dyes in the sample, so that the disperse dyes in the sample can be extracted as much as possible, and other impurities in the sample are prevented from being extracted overmuch. A sodium hydroxide solution is added into a test tube so as to neutralize to obtain proper pH, and a generated amine substance is relative stable under the pH condition. Five milliliters of tert-butyl methyl ether is added to facilitate liquid-liquid extraction. A moderate amount of sodium sulfate is added so as to absorb water, accelerate layering and facilitate removing of part of impurities in an organic phase.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method of prohibited azo dyes in inks, coatings and paints. Background technique [0002] Azo dyes are the dyes with the largest number of varieties in the current dye market. They are named after the azo groups contained in the dye molecules. It is widely used in the dyeing and printing of various natural and synthetic fibers, and also in the coloring of paint, plastic, rubber, etc. After long-term contact with human skin, these clothing or other consumer products dyed with prohibited azo dyes will mix with the components released during metabolism and undergo a reduction reaction to form carcinogenic aromatic amine compounds, which will be absorbed by the human body. After a series of activation, the DNA of human cells undergoes structural and functional changes, becoming the cause of human disease. The current banned azo dyes are mainly tested for leather and textiles, and t...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/14
Inventor 陈凯松
Owner 广州衡创测试技术服务有限公司
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