GB/T 29661-2013 English PDFUS$139.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 29661-2013: Determination of urea content in cosmetics -- Enzymatic method Status: Valid
Basic dataStandard ID: GB/T 29661-2013 (GB/T29661-2013)Description (Translated English): Determination of urea content in cosmetics -- Enzymatic method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y42 Classification of International Standard: 71.100.70 Word Count Estimation: 6,693 Quoted Standard: GB/T 6682; GB/T 601 Regulation (derived from): National Standards Bulletin 2013 No. 17 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 specifies: cosmetics urea content Determination Enzymatic method. This standard applies to: cosmetics urea quantitative determination, their lower limit of quantification of 0. 025 %. GB/T 29661-2013: Determination of urea content in cosmetics -- Enzymatic 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 urea content in cosmetics. Enzymatic method ICS 71.100.70 Y42 National Standards of People's Republic of China Determination of urea content in cosmetics Enzymatic method Issued on. 2013-09-06 2014-02-15 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of Fragrance Flavor and Cosmetic (SAC/TC257) centralized. This standard was drafted. Shanghai Daily Chemical Industry Institute (Fragrance Flavor and Cosmetic National Quality Supervision and Inspection Center), Dalian production Product quality supervision and inspection. The main drafters of this standard. Cui Jian Jie, Li Qiong, Lin Yan, Kang Wei, Sun Chih-Ching, Wu Haixia, Maoxi Qin. Determination of urea content in cosmetics Enzymatic method1 ScopeThis standard specifies the method for determination of urea in cosmetics content --- enzyme catalysis. This standard applies to cosmetics quantitative determination of urea, the lower limit of quantitation of 0.025%.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. Laboratory use specifications and test methods GB/T 6682 Analysis Preparation of GB/T 601 chemical reagent standard titration solution Principle 3 Samples under acidic conditions, which contain urea urease is decomposed ammonium salt, with an acid titration, thereby calculating urea content. CO (NH2) 2 2H2O โ Urease (NH4) 2CO3 (NH4) 2CO3 2HCl = 2NH4Cl CO2 H2O4 Reagents and materialsUnless otherwise specified, reagents were of analytical grade. Water for the three water GB/T 6682 regulations. 4.1 urease. 0.5g or less may be 0.25g urea at 40 โ ~ 45 โ completely decomposed within 1h. In accordance with the product instructions to save. 4.2 0.1mol/L hydrochloric acid. preparation methods according to GB/T 601. 4.3 0.1mol/LNaOH solution. Weigh 0.40gNaOH solid was dissolved in 100mL of water. 4.4 ethanol. 4.5 plastic film. 5. Apparatus 5.1-high beaker, 100mL. 5.2 Acid burette. 5.3 ultrasonic cleaning. 5.4 magnetic stirrer. 5.5 pH meter. accuracy 0.01. 5.6 Analysis of balance. a sense of the amount of 0.01g. 5.7 constant temperature water bath. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 29661-2013_English be delivered?Answer: Upon your order, we will start to translate GB/T 29661-2013_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 29661-2013_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 29661-2013_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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