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Proficiency testing samples and preparation methods for the detection of decomposable 3,3'-dimethylbenzidine dyes in textiles

A dimethylbenzidine, proficiency testing technology, applied in the preparation of test samples, material inspection products, textile testing, etc. problem, to achieve the effect of simple preparation method and high success rate

Inactive Publication Date: 2019-09-17
BEIJING ENTRY EXIT INSPECTION & QUARANTINE BUREAU INSPECTION & QUARANTINE TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This detection method has high requirements for pre-treatment, and poor treatment and condition control of steps such as reduction temperature, reduction time, liquid-liquid extraction, rotary evaporation temperature, and vacuum degree may affect the accuracy of the detection results.

Method used

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  • Proficiency testing samples and preparation methods for the detection of decomposable 3,3'-dimethylbenzidine dyes in textiles
  • Proficiency testing samples and preparation methods for the detection of decomposable 3,3'-dimethylbenzidine dyes in textiles
  • Proficiency testing samples and preparation methods for the detection of decomposable 3,3'-dimethylbenzidine dyes in textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, the concentration of 3,3'-dimethylbenzidine decomposed is about 52.1mg / kg

[0032] A method for preparing a proficiency testing sample for decomposable 3,3'-dimethylbenzidine dye detection in textiles, the method comprising the following steps:

[0033] (1) Select substrate: select pure cotton woven plain bleached gray fabric with clean and flawless cloth surface, the fabric parameters are: width 183cm, warp direction 235 threads / 10cm, weft direction 234 threads / 10cm, grammage 131g / m2.

[0034] (2) Select the dyeing method: use the dip dyeing method. Choose Dye and Formula: Direct Red. Its formula is: Direct Red 2, 0.5% (o.w.f), NaCl 10g / L, NaCl 2 CO 3 2g / L, plus 0.5g / L.

[0035] Specific dyeing process: first put the cotton cloth into soft water with a bath ratio of 1:10 for pretreatment. 2 CO 3 2g / L, plus 0.5g / L. ) into soft water with a liquor ratio of 1:20 and stir the solution evenly. After the dyeing bath is prepared, put the wet cotton cloth i...

Embodiment 2

[0046] Example 2, the concentration of 3,3'-dimethylbenzidine decomposed is about 103.9mg / kg

[0047] A method for preparing a proficiency testing sample for decomposable 3,3'-dimethylbenzidine dye detection in textiles, the method comprising the following steps:

[0048] (1) Select substrate: select pure cotton woven plain bleached gray fabric with a clean and flawless surface. The fabric parameters are: width 183cm, warp direction 235 threads / 10cm, weft direction 234 threads / 10cm, gram weight 131g / m 2 .

[0049] (2) Select the dyeing method: use the dip dyeing method. Choose Dye and Formula: Direct Red. Its formula is: Direct Red 2, 1% (o.w.f), NaCl 10g / L, NaCl 2 CO 3 2g / L, plus 0.5g / L.

[0050] Specific dyeing process: first put the cotton cloth into soft water with a bath ratio of 1:10 for pretreatment. 2 CO 3 2g / L, plus 0.5g / L. ) into soft water with a liquor ratio of 1:20 and stir the solution evenly. After the dyeing bath is prepared, put the wet cotton cloth ...

Embodiment 3

[0061] Example 3, the concentration of 3,3'-dimethylbenzidine decomposed is about 200.4mg / kg

[0062] A method for preparing a proficiency testing sample for decomposable 3,3'-dimethylbenzidine dye detection in textiles, the method comprising the following steps:

[0063] (1) Select substrate: select pure cotton woven plain bleached gray fabric with a clean and flawless surface. The fabric parameters are: width 183cm, warp direction 235 threads / 10cm, weft direction 234 threads / 10cm, gram weight 131g / m 2 .

[0064] (2) Select the dyeing method: use the dip dyeing method. Choose Dye and Formula: Direct Red. Its formula is: Direct Red 2, 2% (o.w.f), NaCl 10g / L, NaCl 2 CO 3 2g / L, plus 0.5g / L.

[0065] Specific dyeing process: first put the cotton cloth into soft water with a bath ratio of 1:10 for pretreatment. 2 CO 3 2g / L, plus 0.5g / L. ) into soft water with a liquor ratio of 1:20 and stir the solution evenly. After the dyeing bath is prepared, put the wet cotton cloth ...

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Abstract

The invention discloses a proficiency testing sample for detection of textile dyes capable of decomposing to generate 3,3'-dimethylbenzidine and a preparation method. The proficiency testing sample is prepared by directly dying the dye Red 2 to cambrayon by a dyeing process. The proficiency testing sample can be stored and transported at normal temperature; its homogeneity and stability meets requirements of Guidance on Evaluating the Homogeneity and Stability of Samples Used for Proficiency Testing CNAS-GL03.

Description

technical field [0001] The invention relates to a proficiency verification sample for detecting decomposable 3,3'-dimethylbenzidine dye in textiles and a preparation method thereof. Background technique [0002] Because some azo dyes can decompose carcinogenic aromatic amines, the European Union and many countries in the world have formulated relevant laws and regulations to prohibit the use of azo dyes that decompose and produce carcinogenic aromatic amines in textiles, and strictly control the azo dyes that enter the country Supervise and inspect textile products, and prohibit unqualified products from entering the country. my country has promulgated and implemented the national mandatory standard "National Basic Safety Technical Specifications for Textile Products" (GB18401-2010), which stipulates that 24 kinds of carcinogenic aromatic amines decomposed from banned azo dyes in textiles should be tested, and the limit is 20mg / kg, which is clearly unqualified textiles are n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/36G01N1/28
Inventor 乔彩霞周征宇蒋金萍苗其来饶云雷张杰
Owner BEIJING ENTRY EXIT INSPECTION & QUARANTINE BUREAU INSPECTION & QUARANTINE TECH CENT