SN/T 1303-2003 English PDFUS$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. SN/T 1303-2003: Method for the determination of benzoic acid, sorbic acid and p-hydroxybenzoates in royal jelly. Liquid chromatographic method Status: Valid
Basic dataStandard ID: SN/T 1303-2003 (SN/T1303-2003)Description (Translated English): Method for the determination of benzoic acid, sorbic acid and p-hydroxybenzoates in royal jelly. Liquid chromatographic method Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: X31 Word Count Estimation: 7,786 Date of Issue: 2003-08-18 Date of Implementation: 2004-02-01 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China Summary: This standard specifies the royal jelly of benzoic acid, sorbic acid, methyl paraben, ethyl paraben, propyl paraben, butyl paraben inspection sampling and liquid chromatographic method. This standard applies to royal jelly benzoic acid, sorbic acid, methyl paraben, ethyl paraben, propyl paraben, butyl paraben test. SN/T 1303-2003: Method for the determination of benzoic acid, sorbic acid and p-hydroxybenzoates in royal jelly. 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. Method for the determination of benzoic acid, sorbic acid and p-hydroxybenzoates in royal jelly.Liquid chromatographic method Book of the People's Republic of China Entry and Exit Inspection and Quarantine Benzoic acid, sorbic acid, sorbic acid, Paraben test method Liquid chromatography Released on.2003-08-18 2004-02-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued ForewordAppendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard was drafted. Henan Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Liu Yafeng, Yang Yuzhou, Liu Zhaohui, Liang Wei, Yuan Ping. This standard is the industry standard for inspection and quarantine issued for the first time. Benzoic acid, sorbic acid, sorbic acid, Paraben test method Liquid chromatography1 ScopeThis standard specifies benzoic acid, sorbic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, and para-hydroxybenzoate in royal jelly. Sampling and liquid chromatography methods for the determination of esters, butyl parabens. This standard applies to benzoic acid, sorbic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, and p-hydroxybenzoate in royal jelly. Testing of esters and butyl parabens.2 Sampling and sample preparation2.1 Inspection lot One inspection batch is one inspection batch, and each inspection batch is no more than 1t. The same inspection batch should have the same characteristics, such as packaging, marking, origin, specifications, grades, etc. 2.2 Number of samples The number of samples is shown in Table 1. Table 1 Batch/piece sampling/piece 1 to 50 51～100 >100 2.3 Sampling method Randomly extract the number of samples according to 2.2, open one by one, and take one can (bag) from each piece, take about 50g per can (bag), as the original sample. 2.4 Sample preparation method Mix the sample thoroughly and divide it into two equal parts. After sealing, mark the mark, one for the sample and one for the test. use. Samples should be protected from contamination and changes in content during sampling and sample preparation operations. 2.5 Sample storage 2.5.1 The sample should be inspected in time. 2.5.2 In case of untimely inspection, the sample should be stored frozen below -18 °C.3 Test methods3.1 Principle of the method Benzoic acid, sorbic acid, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, p-hydroxybenzoic acid in the sample The butyl acrylate is extracted with ethanol, and after centrifugation, the supernatant liquid is taken for liquid chromatograph measurement and quantified by external standard method. 3.2 Reagents and materials Unless otherwise specified, the reagents used were of analytical grade and the water was deionized water. 3.2.1 Anhydrous ethanol. excellent grade pure. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 1303-2003_English be delivered?Answer: Upon your order, we will start to translate SN/T 1303-2003_English as soon as possible, and keep you informed of the progress. 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