GB/T 7731.6-2008 English PDFUS$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7731.6-2008: Ferrotungsten -- Determination of arsenic content -- The molybdenum blue photometric method and inductively coupled plasma-atomic emission spectrometry Status: Valid GB/T 7731.6: Historical versions
Basic dataStandard ID: GB/T 7731.6-2008 (GB/T7731.6-2008)Description (Translated English): Ferrotungsten -- Determination of arsenic content -- The molybdenum blue photometric method and inductively coupled plasma-atomic emission spectrometry Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H11 Classification of International Standard: 77.100 Word Count Estimation: 9,918 Date of Issue: 2008-08-19 Date of Implementation: 2009-04-01 Older Standard (superseded by this standard): GB/T 7731.6-1987 Quoted Standard: GB/T 4010 Regulation (derived from): National Standard Approval Announcement 2008 No.14 (Total No.127) 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 arsenic content of iron in tungsten molybdenum blue photometric spectrometry and inductively coupled plasma atomic emission. This section applies to the determination of tungsten iron arsenic content. Molybdenum blue spectrophotometric measurement range (mass fraction): 0. 010% to 0. 10%, inductively coupled plasma atomic emission spectrometry range (mass fraction): 0. 010% to 0. 20 %. GB/T 7731.6-2008: Ferrotungsten -- Determination of arsenic content -- The molybdenum blue photometric method and inductively coupled plasma-atomic emission spectrometry---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 arsenic content. The molybdenum blue photometrie method and inductively coupled plasma-atomic emission spectrometry ICS 77.100 H11 National Standards of People's Republic of China Replacing GB/T 7731.6-1987 Determination of tungsten iron arsenic and molybdenum blue spectrophotometry Inductively coupled plasma atomic emission spectrometry Posted 2008-08-19 2009-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis section GB/T 7731 is to GB/T 7731.6-1987 "spectrophotometric determination of iron chemical analysis of tungsten and molybdenum blue arsenic amount" of repair Set, including molybdenum blue photometric method and inductively coupled plasma atomic emission spectrometry analysis method two. This Part replaces GB/T 7731.6-1987. This portion of the GB/T 7731.6-1987 comparison, the main changes are as follows. --- Molybdenum blue spectrophotometric method for the preparation of standard text format of the specification; --- Increased by inductively coupled plasma atomic emission spectrometry. Appendix A of this section is an informative annex. This part is proposed by the China Iron and Steel Association. This part of pig iron and ferroalloy by the National Standardization Technical Committee. This section is drafted. Sinosteel Jilin Ferroalloy Co., Ltd. The main drafters of this section. phosphorus, copper Bi Jun, Zhang Yunpeng, high Yumin, Yuan Ping. This part of the standard replaces the previous editions are. --- GB/T 7731.6-1987. Determination of tungsten iron arsenic and molybdenum blue spectrophotometry Inductively coupled plasma atomic emission spectrometry Warning. Use of practical experience GB/T 7731 this part of the staff should have regular laboratory work. This section does not indicate all available Energy security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.1 ScopeGB/T 7731 provisions of this part of the iron determination of tungsten molybdenum blue photometric method and inductively coupled plasma atomic emission spectrometry Arsenic content. This section applies to the determination of tungsten iron arsenic content. Molybdenum blue spectrophotometric measurement range (mass fraction). 0.010% to 0.10%; inductively coupled Plasma atomic emission spectrometry range (mass fraction). 0.010% to 0.20%.2 Normative referencesThe following documents contain provisions which, through reference to GB/T 7731 to the present, constitute provisions of this section. Every note has a reference date Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Research into whether the parties to the agreement to use 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 samples 3 Method One. molybdenum blue photometric 3.1 Principle Sample with sodium peroxide, sodium carbonate melt, after leaching in sulfuric acid solution containing tartaric acid in hydrogen sulfide arsenic and copper, tin and other co-precipitation Isolated, dissolved in nitric acid, sulfuric acid, oxidation with sodium hydroxide. Sulfuric acid solution to adjust the pH, add ammonium molybdate and hydrazine sulfate reaction of molybdenum Blue, measuring absorbance at 810nm wavelength. 3.2 Reagents and materials Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled water or its equivalent purity water. 3.2.1 sodium peroxide, solid. 3.2.2 sodium carbonate, a solid (dry). 3.2.3 tartaric, solid. 3.2.4 nitrate, ρ1.42g/mL. 3.2.5 sulfate, ρ1.84g/mL. 3.2.6 ammonium hydroxide, ρ0.90g/mL. 3.2.7 nitric acid, 1 + 1. 3.2.8 sulfuric acid, 1 + 1. 3.2.9 sulfate, 1 + 10. 3.2.10 ammonium hydroxide, 1 + 1. 3.2.11 hydrogen sulfide, ferrous sulfide and dilute hydrochloric acid occurs Kipp generator reaction. 3.2.12 sodium hydroxide solution, 150g/L. 3.2.13 potassium permanganate solution, 5g/L. 3.2.14 ammonium molybdate solution, 10g/L, weighed 1g paramolybdate dissolved and diluted with water to 100mL. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7731.6-2008_English be delivered?Answer: Upon your order, we will start to translate GB/T 7731.6-2008_English as soon as possible, and keep you informed of the progress. 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