GB/T 21917-2008 English PDFUS$239.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21917-2008: Method for Determination of Ethyl Maltol in Beverage Status: Obsolete
Basic dataStandard ID: GB/T 21917-2008 (GB/T21917-2008)Description (Translated English): Method for Determination of Ethyl Maltol in Beverage Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: X50 Classification of International Standard: 67.160 Word Count Estimation: 6,666 Date of Issue: 2008-05-16 Date of Implementation: 2008-11-01 Quoted Standard: GB/T 6682 Regulation (derived from): National Standard Approval Announcement 2008 No.9 (Total No.122) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard provides high-performance liquid chromatographic method ethylmaltol of drinks. This standard applies to carbonic acid, determination of protein drinks ethylmaltol content, juices. This standard detection limit: 5. 0 mg/L. GB/T 21917-2008: Method for Determination of Ethyl Maltol in Beverage---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 Determination of Ethyl Maltol in Beverage ICS 67.160 X50 National Standards of People's Republic of China Determination of ethyl maltol in beverages Posted 2008-05-16 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordAppendix A of this standard is an informative annex. This standard by the national food safety emergency standardization working group proposed and managed. This standard was drafted. Haidian District, Beijing Products Quality Supervision, Inspection and the (National Food Quality Supervision, Inspection and Safety Center). The main drafters of this standard. Wang Hao, Liu Yanqin, Cao Hong, Yang Hongmei, Yan Long Bao, Mu with Na. Determination of ethyl maltol in beverages1 ScopeThis standard specifies a high performance liquid chromatographic method beverages Ethyl maltol. This standard applies to the determination of carbonated, juice, protein drinks ethyl maltol content. The standard detection limit. 5.0mg/L (signal to noise ratio S/N = 10).2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-1992, neq ISO 3696. 1987) Principle 3 The sample was diluted with water, filtered through 0.45μm membrane, liquid chromatography UV detector measurement, external standard.4 Reagents4.1 Water. GB/T 6682 provided a water. 4.2 Methanol. chromatographically pure. 4.3 acetonitrile. AR. 4.4 hydrochloric acid solution (5mol/L). weighed about 41.7mL hydrochloric acid, add water volume to 100mL. 4.5 Sodium hydroxide solution (5mol/L). Weigh 200g of sodium hydroxide (NaOH), after fully dissolved add water volume to 1L. 4.6 aqueous sodium dihydrogen phosphate (0.02mol/L). Weigh 3.12g sodium dihydrogen phosphate (NaH2PO4 · 2H2O), add water fully dissolved After the solution volume to 1L. 4.7 ethyl maltol standard stock solution. Weigh ethyl maltol standards (purity > 99.3%) 0.1g (accurate to 0.1000g), dissolve In methanol and set the volume to 100mL volumetric flask, and this solution is equivalent to the concentration of 1.0mg/mL. 4.8 ethyl maltol standard solution. Pipette stock standard solution 0.0,1.0,2.0,4.0,6.0,10.0mL, water volume to 100mL, this corresponds to the concentration of the standard solution series 0.0,10.0,20.0,40.0,60.0,100.0μg/mL.5 Instruments5.1 HPLC (with UV detection). 5.2 Column. C18 reverse phase column 5μm, 250mm × 4.6mm (diameter). 5.3 Analysis of balance. a sense of the amount of 0.1mg. 5.4 meter dry nitrogen. Step 6 Analysis 6.1 Sample Preparation 6.1.1 carbonated drinks Imbibe after exhaust sample 5.0mL, diluted with water to 10.0mL, after thorough mixing shake through 0.45μm membrane filter, injection 15μL chromatographic analysis. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21917-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 21917-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 21917-2008_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 21917-2008_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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