GB/T 7731.12-2008 English PDFUS$229.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7731.12-2008: Ferrotungsten -- Determination of sulfur content -- Infrared absorption method and combustion titration method Status: Valid GB/T 7731.12: Historical versions
Basic dataStandard ID: GB/T 7731.12-2008 (GB/T7731.12-2008)Description (Translated English): Ferrotungsten -- Determination of sulfur content -- Infrared absorption method and combustion titration method Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H11 Classification of International Standard: 77.100 Word Count Estimation: 10,121 Date of Issue: 2008-05-13 Date of Implementation: 2008-11-01 Older Standard (superseded by this standard): GB/T 7731.12-1988; GB/T 7731.13-1988 Quoted Standard: GB/T 4010 Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121) 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 use of infrared absorption method and combustion and sulfur content measured by titration. This section applies to the determination of sulfur content of tungsten iron. Measuring range (mass fraction) infrared absorption method: 0. 0050% ~ 0. 25%, measurement range (mass fraction) combustion and titration: 0. 0050% to 0. 25 %. GB/T 7731.12-2008: Ferrotungsten -- Determination of sulfur content -- Infrared absorption method and combustion titration 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. Ferrotungsten. Determination of sulfur content. Infrared absorption method and combustion titration method ICS 77.100 H11 National Standards of People's Republic of China Replacing GB/T 7731.12-1988, GB/T 7731.13-1988 Determination of tungsten iron sulfur content The infrared absorption method and combustion titration method Posted 2008-05-13 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis part is the "Determination of sulfur content of tungsten iron chemical analysis of infrared absorption method" GB/T 7731.12-1988, GB/T 7731.13-1988 "tungsten iron chemical analysis of combustion and determination of sulfur content titration" integration amendment. This Part replaces GB/T 7731.12-1988 "iron chemical analysis of tungsten infrared absorption method for determination of sulfur content" GB/T 7731.13-1988 "tungsten iron chemical analysis of combustion and determination of sulfur content titration." This portion of the GB/T 7731.12-1988 and GB/T 7731.13-1988 comparison, the main changes are as follows. --- Determine the detection limit of combustion and titration of 0.0050%; --- Modify the burning and allow titration method; --- Infrared absorption method detection limit of 0.015% by revised to 0.0050%; --- Modified infrared absorption method allows the poor. This part is proposed by the China Iron and Steel Association. This section is under the jurisdiction of Metallurgical Industry Information Standards Institute. This section is drafted. Sinosteel Jilin Ferroalloy Co., Ltd. The main drafters of this section. Yang Fan Liya Hua, in Guiping. This part of the standard replaces the previous editions are. --- GB/T 7731.12-1988; --- GB/T 7731.13-1988. Determination of tungsten iron sulfur content The infrared absorption method and combustion titration method Warning. Use of this section shall be a person experiences regular laboratory work. This section does not indicate that all possible security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.1 ScopeThis section provides the infrared absorption method and the determination of sulfur content and combustion titration method. This section applies to the determination of sulfur content of tungsten iron, infrared absorption measurement range (mass fraction) Law. 0.0050% - 0.25%; combustion Neutralization titration measurement range (mass fraction). 0.0050% to 0.25%.2 Normative referencesThe following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 4010 alloy chemical analysis and preparation of samples3 a method of infrared absorption method3.1 Principle A high frequency induction furnace to sample the combustion heating oxygen flow, the oxygen produced by the sulfur dioxide contained in the measuring chamber to the infrared analyzer dioxide S absorption of a specific wavelength of infrared energy absorbed is proportional to its concentration can, according to the detector to accept the change in energy can be measured sulfur content. 3.2 Reagents and materials 3.2.1 Magnesium perchlorate anhydrous particles. 3.2.2 asbestos caustic soda, granular. 3.2.3 glass wool. 3.2.4 tungsten particles, sulfur content is less than 0.0002%, particle size 0.8mm ~ 1.4mm. 3.2.5 tin particles, the amount of carbon is less than 0.0003%, particle size of 0.4mm ~ 0.8mm. 3.2.6 pure iron purity of more than 99.80%, sulfur content less than 0.002%, particle size 0.8mm ~ 1.68mm. 3.2.7 oxygen purity of more than 99.95%, if other levels of oxygen to obtain a low and consistent blank, can also be used. 3.2.8 power source gas, nitrogen and compressed air, the impurities (water and oil) content of less than 0.5%. 3.2.9 ceramic crucible, × h (mm), 23 × 23 or 25 × 25, and at more than 1200 ℃ high temperature furnace burning 4h or through burning oxygen Till the blank is the lowest. 3.2.10 crucible tongs. 3.3 instruments and equipment 3.3.1 Sulphur infrared absorption analyzer (sensitivity of 1 × 10-6) Its apparatus shown in Figure 1. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7731.12-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 7731.12-2008_English as soon as possible, and keep you informed of the progress. 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