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FZ/T 50049-2020 English PDFUS$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. FZ/T 50049-2020: Man-made Fibres - Test method for amino acid content Status: Valid
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FZ/T 50049-2020: Man-made Fibres - Test method for amino acid content---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.(Test method for amino acid content of chemical fiber) ICS 59.060.20 W50 People's Republic of China Textile Industry Standard Test method for amino acid content of chemical fiber 2020-04-16 released 2020-10-01 implementation Issued by the Ministry of Industry and Information Technology of the People's Republic of China ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China National Textile and Apparel Council. This standard is under the jurisdiction of Shanghai Textile Industry Technical Supervision. Drafting organizations of this standard. Guangzhou Fiber Products Inspection and Research Institute, Shanghai Textile Industry Technical Supervision Institute, Anhui Hongxiang Silk Weaving Co., Ltd. Company, Anhui Product Quality Supervision and Inspection Institute, Tongkun Group Co., Ltd., Shanghai Textile Group Testing Standard Co., Ltd. The main drafters of this standard. Xie Jianfei, Hu Jiancan, Ding Zhenhua, Zhou Zhende, Qin Xianghong, Liu Yanli, Xu Yan. Test method for amino acid content of chemical fiber1 ScopeThis standard specifies the method for the determination of amino acids in chemical fibers with an automatic amino acid analyzer. This standard applies to aspartic acid, threonine, serine, glutamic acid, proline, glycine, alanine, cystine, and valine in chemical fibers. Determination of 17 amino acids such as methionine, isoleucine, leucine, tyrosine, phenylalanine, histidine, lysine and arginine.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 6503-2017 Chemical fiber moisture regain test method GB/T 6682 Analytical laboratory water specifications and test methods3 PrincipleThe protein in chemical fiber is hydrolyzed into free amino acid by hydrochloric acid, and separated by the ion exchange separation column of the amino acid analyzer, The triketone solution produces a derivative color reaction, and then the amino acid content is determined by colorimetry and quantified by external standard method.4 Reagents and materials4.1 Reagents 4.1.1 Concentrated hydrochloric acid, excellent grade pure. 4.1.2 Water, in line with the first grade water specified in GB/T 6682. 4.1.3 Sodium citrate (Na3C6H5O7·2H2O), excellent grade pure. 4.1.4 Sodium hydroxide (NaOH), excellent grade pure. 4.1.5 Sodium chloride (NaCl), excellent grade pure. 4.1.6 Lithium hydroxide (LiOH·H2O), excellent grade pure. 4.1.7 Glacial acetic acid (C2H4O2), excellent grade pure. 4.1.8 Dimethyl sulfoxide (C2H6OS), pure superior grade. 4.2 Reagent preparation 4.2.1 6mol/L hydrochloric acid. Mix concentrated hydrochloric acid and water at a ratio of 1.1 (volume ratio). 4.2.2 0.02mol/L hydrochloric acid. Dilute concentrated hydrochloric acid 600 times with water, and store in a refrigerator at 0℃~4℃. 4.2.3 pH2.2 sodium citrate buffer. weigh 19.6g sodium citrate (Na3C6H5O7.2H2O) and 16.5mL concentrated hydrochloric acid and add water Dilute to 1000mL, adjust the pH to 2.2 with concentrated hydrochloric acid or 500g/L sodium hydroxide solution. 4.2.4 Sodium citrate buffer of pH 3.3.Weigh 19.6g sodium citrate and 12mL concentrated hydrochloric acid and dilute to 1000mL with water, and use concentrated salt Adjust the pH to 3.3 with acid or 500g/L sodium hydroxide solution. 4.2.5 Sodium citrate buffer with pH 4.0.Weigh 19.6g sodium citrate and 9mL concentrated hydrochloric acid and dilute with water to 1000mL, then use concentrated salt ...... |