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GB/T 35257-2017: Textiles -- Quantitative chemical analysis -- Mixtures of chitosan and certain other fibers (method using acetic acid)
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GB/T 35257-2017: Textiles -- Quantitative chemical analysis -- Mixtures of chitosan and certain other fibers (method using acetic acid)

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Textiles-Quantitative chemical analysis-Mixtures of chitosan and certain other fibers (method using acetic acid) ICS 59.080.01 W04 National Standards of People's Republic of China Textile Quantitative Chemical Analysis Chitosan fiber with some others Fiber mixture (acetic acid method) certainotherfibers (methodusingaceticacid) 2017-12-29 Posted 2018-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard proposed by the China Textile Industry Federation. This standard by the National Textile Standardization Technical Committee (SAC/TC209) centralized. This standard was drafted unit. Qingdao Textile Supervision and Inspection Institute, Textile Standard Test Certification Co., Ltd., Shenzhen Bailey cool Co., Ltd., Dongguan City, with the Knitwear Co., Ltd., Fujian Changle Changyuan Textile Co., Ltd. The main drafters of this standard. Yu Jingchao, Jin'an, Li Chun, Si Ying, Zhang Xin, Wang Yu, Guo Quan, the Yellow River wave, Yin Hang, Chen Minghong. Textile Quantitative Chemical Analysis Chitosan fiber with some others Fiber mixture (acetic acid method)

1 Scope

This standard specifies the use of acetic acid method to determine the removal of non-fibrous material after two-component mixture of chitosan fibers and other fiber-containing The amount of method. This standard applies to chitosan fibers and cellulose fibers (cotton, linen, ramie, hemp, viscose fiber, modal fiber, lyocell fiber Dimensional), a two-component mixture of protein fibers (wool, cashmere, silk) or synthetic fibers (polyester fibers, polyamide fibers, polyacrylonitrile fibers) Compounds; other similar fibers not given in this standard may be implemented by reference.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 2910.1 Textiles - Quantitative Chemical Analysis Part 1. General Principles of Testing

3 principle

With a certain concentration of acetic acid solution of chitosan fibers dissolved from the known quality of the mixture was removed, the residue was collected, washed, roasted Dry and weigh; calculate the percentage of dry mass of the mixture using the corrected mass. The difference between the mass percentage of chitosan fibers. Note. Chitosan fiber qualitative identification method can refer to Appendix A.

4 reagent

Use GB/T 2910.1 and the provisions of this standard 4.1 and 4.2 reagents. 4.1 2% (mass fraction) acetic acid solution Take 20mL glacial acetic acid (density ρ = 1.049g/mL), diluted with water to 1L, and mix. 4.2 dilute ammonia solution Take 80mL concentrated ammonia (density ρ = 0.880g/mL), diluted with water to 1L, and mix.

5 device

Use GB/T 2910.1 and the provisions of this standard 5.1 and 5.2 equipment. 5.1 stopper conical flask capacity of not less than 500mL. 5.2 constant temperature water bath oscillator. To maintain the temperature at 90 ℃ ~ 95 ℃.

6 test procedures

Follow the general procedure specified in GB/T 2910.1 and follow the steps below. 6.1 Place the sample in the conical flask (5.1), add.200 mL of 2% acetic acid solution (4.1) per gram of sample, plug the glass stopper, shake vigorously, ...