GB/T 5178-2008 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 5178-2008: Surface active agents -- Determination of mean relative molecular mass for technical straight-chain sodium alkylbenzene sulfonates -- Gas-liquid chromatographic method Status: Valid GB/T 5178: Historical versions
Basic dataStandard ID: GB/T 5178-2008 (GB/T5178-2008)Description (Translated English): Surface active agents -- Determination of mean relative molecular mass for technical straight-chain sodium alkylbenzene sulfonates -- Gas-liquid chromatographic method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G72 Classification of International Standard: 71.100.40 Word Count Estimation: 12,133 Date of Issue: 2008-12-30 Date of Implementation: 2009-09-01 Older Standard (superseded by this standard): GB/T 5178-1985 Adopted Standard: ISO 6841-1988, MOD Regulation (derived from): National Standard Approval Announcement 2008 No.24 (Total No.137) 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 the determination of linear alkyl benzene sulfonate industrial average relative molecular mass approach. This standard applies to the determination of linear alkyl benzene. This standard does not apply for the determination of branched-chain alkyl benzene (due to peak branched alkyl benzene can not be identified). GB/T 5178-2008: Surface active agents -- Determination of mean relative molecular mass for technical straight-chain sodium alkylbenzene sulfonates -- Gas-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. Surface active agents. Determination of mean relative molecular mass for technical straight-chain sodium alkylbenzenesulfonates. Gas-liquid chromatographic method ICS 71.100.40 G72 National Standards of People's Republic of China Replacing GB/T 5178-1985 Surfactant Industry linear alkyl benzene sulfonate Determination of the average molecular weight of the gas-liquid chromatography (ISO 6841. 1988, Surfaceactiveagents-Technicalstraight-chainsodium gas-liquidchromatography, MOD) Posted 2008-12-30 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis revised standard adopts the International Standard ISO 6841. 1988 "industrial surfactants linear alkyl benzene sulfonate average molecular Determination of mass gas liquid chromatography. " This standard is based on ISO 6841. 1988 re-drafted. For the modified version of ISO standard content, the technical differences that exist with vertical Linear marked terms to which they are involved on the right side of the blank page and listed in Appendix A of the Terms and relevant ISO standards corresponding to the letter Interest rates, given the technical reasons for differences and their list for reference. This standard replaces GB/T 5178-1985 "linear alkyl benzene sulfonate industrial average relative molecular mass determination of gas-liquid chromatography." The main changes compared to 5178-1985 standard and GB/T as follows. --- Standard name becomes "surfactants linear alkyl benzene sulfonate industrial average molecular weight determination of gas and liquid color Spectrum method "; --- Increased use of microwave digestion off sulfonic acid group, which is simpler than the original standard procedures and shorten the time Demineralized. Appendix A of this standard is an informative annex. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee surfactant and detergent. This standard was drafted. National Cleaning Products Quality Supervision and Inspection Center (Taiyuan), China Daily Chemical Industry Research Institute, Chan Yu, Zhejiang Branch TECHNOLOGY CO., LTD. The main drafters of this standard. Yan Fang, Chen Yao, the Mao Zhou Xing, Huang Yaru. This standard replaces the standards previously issued as follows. --- GB/T 5178-1985. Surfactant Industry linear alkyl benzene sulfonate Determination of the average molecular weight of the gas-liquid chromatography1 ScopeThis standard specifies the determination of linear alkyl benzene sulfonate industrial average molecular weight method. This standard applies to the determination of linear alkyl benzene. This standard does not apply to the determination branched chain alkyl benzene used (due to peak branched chain alkyl benzene can not be identified). Principle 2 Sample off a sulfonic acid group in concentrated phosphoric acid, and extracted with petroleum ether released benzenes. Determination of alkyl benzene extraction by gas-liquid chromatography The average molecular weight. An average relative molecular mass of LAS. The use of gas-liquid chromatography off alkylbenzene sulfonate group average relative molecular mass Amount, and then add the formula amount SO3Na group minus a hydrogen atomic weight is calculated.3 Reagents and reference samplesUnless otherwise indicated in the analysis using only recognized as analytical reagents and carbon dioxide-free distilled or deionized water or phase purity When the water. 3.1 phosphoric acid. 3.2 petroleum ether, distillation range 30 ℃ ~ 60 ℃. 3.3 over anhydrous sodium sulfate. 3.4 Sodium hydroxide, 160g/L solution. 3.5 acetone. 3.6 Reference alkyl benzene. Known alkylbenzene mixture of chain lengths, for example, C9 ~ C15 alkyl benzene. It may be a component known as a reference product Test sample, the reference sample can be used to test the performance of the chromatograph is normal.4 Instrument4.1 pyrolysis tube. diameter 11mm, length 60mm (wall thickness of about 1mm) rigid glass tube nozzle flange, see Fig. 1a). 4.2 nuts and bolts Hollow. use its silicone rubber pad and thermal cracking tube PTFE membrane (4.1) seal, see Fig. 1b) and 1c). Millimeters a) pyrolysis tube b) hollow bolt and nut c) sealing means1 thermal cracking tube and sealing device...... |
