Proficiency testing sample for pH determination of aqueous extract of textile, and preparation method of proficiency testing sample

A proficiency testing and extraction technology, applied in the preparation of test samples, etc., can solve problems such as irritation of the user's skin, loss of resistance to harmful bacteria, and impact on the performance of textile products, achieving the effect of high success rate and simple preparation method

Active Publication Date: 2013-10-09
PEOPLES REPUBLIC OF CHINA BEIJING ENTRY EXIT INSPECTION & QUARANTINE BUREAU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the pH value of the water extraction of the textile product is in the neutral or weakly acidic range, it will be beneficial for the protection of the skin of the user by the textile product, and when the pH value of the water extraction of the textile product is alkaline, it may be harmful to the user. When the skin is in contact with

Method used

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  • Proficiency testing sample for pH determination of aqueous extract of textile, and preparation method of proficiency testing sample
  • Proficiency testing sample for pH determination of aqueous extract of textile, and preparation method of proficiency testing sample
  • Proficiency testing sample for pH determination of aqueous extract of textile, and preparation method of proficiency testing sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method for preparing a proficiency testing sample for measuring the pH value of a textile water extract, comprising the following steps:

[0048] a. Substrate: 100% cotton gray cloth; the density of the cotton gray cloth is 234.4 threads / 10cm in the radial direction and 232 threads / 10cm in the weft direction; the weight is 135.7g / m 2 ;

[0049] b. Dipping solution:

[0050] Weigh borax: 610g, boric acid: 98.8g, and dissolve them in 40L of tertiary water.

[0051] c. Preparation of samples: 640g gray cloth, 40L impregnating solution, fully stirred and mixed, impregnated for 12 hours, taken out and dried, dried in a constant temperature oven at 25°C for 2 hours, cut, packaged, sealed, and stored in a dry and dark place. Weigh 6.2g samples and put them into polyethylene sealed bags for distributing samples, seal them, number them randomly, stick labels, and store them in a dry place away from light.

[0052] Test the properties of the prepared samples:

[0053] Sample:...

Embodiment 2

[0070] A method for preparing a proficiency testing sample for measuring the pH value of a textile water extract, comprising the following steps:

[0071] a. Substrate: 100% cotton gray cloth; the density of the cotton gray cloth is 234.4 threads / 10cm in the radial direction and 232 threads / 10cm in the weft direction; the weight is 135.7g / m 2 ;

[0072] b. Dipping solution:

[0073] Weigh sodium dihydrogen phosphate: 1263.6g, citric acid: 470g, and dissolve them in 40L of tertiary water.

[0074] c. Preparation of samples: 640g gray cloth, 40L impregnating solution, fully stirred and mixed, impregnated for 12 hours, taken out and dried, dried in a constant temperature oven at 25°C for 2 hours, cut, packaged, sealed, and stored in a dry and dark place. Weigh 6.2g samples and put them into polyethylene sealed bags for distributing samples, seal them, number them randomly, stick labels, and store them in a dry place away from light.

[0075] Test the properties of the prepared...

Embodiment 3

[0091] A kind of preparation method of the proficiency testing sample that is used for the determination of pH value of textile water extract, other steps are with embodiment 2,

[0092] c. Preparation of samples: 640g gray cloth, 40L impregnating solution, fully stirred and mixed, impregnated for 24 hours, taken out and dried, dried in a constant temperature oven at 30°C for 2 hours, cut, packaged, sealed, and stored in a dry and dark place. Weigh 6.2g samples and put them into polyethylene sealed bags for distributing samples, seal them, number them randomly, stick labels, and store them in a dry place away from light.

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Abstract

The invention discloses a proficiency testing sample for pH determination of an aqueous extract of a textile, and a preparation method of the proficiency testing sample. The proficiency testing sample is a piece of impregnation liquid soaked cotton fabric with an aqueous extract within a pH range of 1-14, and an impregnation liquid is a disodium hydrogen phosphate-citrate buffer solution or borax-boric acid buffer with different pH values. The proficiency testing sample can be stored and transported at room temperature, and the uniformity and the stability can fulfill the requirements on CNAS-GL03 proficiency testing sample uniformity and stability assessment guidelines. The invention also provides a preparation method of the proficiency testing sample. The method is simple and has high success rate.

Description

technical field [0001] The invention relates to a proficiency verification sample used for measuring the pH value of a textile water extract and a preparation method thereof. Background technique [0002] In the past, the quality control of textile products mainly focused on the evaluation and assessment of physical properties and indicators such as mechanical properties, dimensional stability, pilling, color fastness, fiber content, and flame retardancy. With the popularization of the concept of textile ecological safety performance, the pH value of textile water extract is gradually becoming an important routine assessment content of textile products. In our country, it is included in the laws and regulations as a mandatory requirement. [0003] Now the textile processing industry has shown typical characteristics of chemical processing. The use of various dyes and chemical additives and auxiliaries has become an important part of textile processing. There will be some f...

Claims

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Application Information

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IPC IPC(8): G01N1/30
Inventor 周建王强刘来福周征宇饶云雷耿佳屈东威李东燕
Owner PEOPLES REPUBLIC OF CHINA BEIJING ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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