SN/T 1121-2002 English PDFUS$519.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. SN/T 1121-2002: Determination of benzoic acid, sorbic acid and parabens in Chinese traditional medicine preparation. Liquid chromatographic method Status: Obsolete
Basic dataStandard ID: SN/T 1121-2002 (SN/T1121-2002)Description (Translated English): Determination of benzoic acid, sorbic acid and parabens in Chinese traditional medicine preparation. Liquid chromatographic method Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: C25 Word Count Estimation: 13,173 Date of Issue: 2002-08-02 Date of Implementation: 2003-01-01 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China Summary: This standard specifies the Chinese herbal mixture, syrup sampling, sample preparation methods, as well as Chinese herbal mixture, syrup of benzoic acid, sorbic acid, methyl paraben, ethyl paraben, propyl paraben and Butylparaben liquid chromatography method. This standard applies to Chinese herbal mixture, syrup of benzoic acid, sorbic acid, methyl paraben, ethyl paraben, propyl paraben and butyl paraben inspection. SN/T 1121-2002: Determination of benzoic acid, sorbic acid and parabens in Chinese traditional medicine preparation. Liquid chromatographic method---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. Determination of benzoic acid, sorbic acid and parabens in Chinese traditional medicine preparation.Liquid chromatographic method People's Republic of China entry and exit inspection and quarantine industry standards Benzoic acid, sorbic acid and parabens in traditional Chinese medicine preparations Acidic preservatives - Methods of test for liquid chromatography People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued ForewordThe measurement methods in this standard are formulated with reference to domestic relevant literature, after research, improvement and verification. Appendix A of this standard is an informative appendix. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard is drafted by. Guangzhou Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Liu Qing, Lin Feng, Cai Chun, Liang Great. This standard is the first industry standard for entry-exit inspection and quarantine. Benzoic acid, sorbic acid and parabens in traditional Chinese medicine preparations Acidic preservatives - Methods of test for liquid chromatography range This standard specifies the sampling and sample preparation methods of traditional Chinese medicine mixture and syrup, as well as benzoic acid, sorbic acid and p-hydroxyl in traditional Chinese medicine mixture and syrup. A method for the determination of methyl benzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate and butyl p-hydroxybenzoate by liquid chromatography. This standard is applicable to traditional Chinese medicine mixture, benzoic acid, sorbic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, p-hydroxyl Examination of propyl benzoate and butyl p-hydroxybenzoate. 抽样 Sampling and sample preparation . Inspection lot No more than 5,000 pieces for an inspection lot. Each inspection lot should be divided into products of the same production batch. . Sampling method .. The minimum draw of 3 pieces under 100 pieces; the minimum draw of 5 pieces from 101 to 1000 pieces; and the lowest draw of 7 pieces from 1000 pieces. .. Randomly extracted according to the quantity specified in 2.2.1. Open one by one, one bottle per piece. Bottled Chinese medicine mixture, syrup, not sampled in each batch Less than 3 bottles (500 mL per bottle), the average test sample is generally not less than 3 times the laboratory requirements. . Preparation of sample The sample taken back was thoroughly mixed, and 500 mL was taken as a sample, which was divided into two parts and placed in a clean container, and the seal was marked. mark. . Preservation of the sample The sample was stored at room temperature. Note. Samples must be protected from contamination during sampling and sample preparation operations. Determination method . Method summary The preservative in the sample is extracted with diethyl ether under acidic conditions, and the extract is concentrated and divided into two parts. benzoic acid, sorbic acid and p-hydroxyester. Tested separately, quantified by liquid chromatography diode array or UV detector external standard method. . Reagents and materials Unless otherwise specified, the reagents were of analytical grade and the water was distilled water. .. Methanol. Pure by liquid chromatography. .. Ether. anhydrous ether. .. Benzoic acid, sorbic acid, p-hydroxybenzoic acid A, B, C, butyl ester standard. purity ≥ 98%. It is diluted with methanol and formulated into a standard working solution of appropriate concentration. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 1121-2002_English be delivered?Answer: Upon your order, we will start to translate SN/T 1121-2002_English as soon as possible, and keep you informed of the progress. 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