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GB/T 8704.1-2009 English PDF

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GB/T 8704.1-2009: Ferrovanadium -- Determination of carbon content -- The infrared absorption method and the gasometric method
Status: Valid

GB/T 8704.1: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 8704.1-2009English209 Add to Cart 3 days [Need to translate] Ferrovanadium -- Determination of carbon content -- The infrared absorption method and the gasometric method Valid GB/T 8704.1-2009
GB/T 8704.1-1997EnglishRFQ ASK 9 days [Need to translate] Methods for chemical analysis of ferrovandium. The infrared absorption method and the gasometric method for the determination of carbon content Obsolete GB/T 8704.1-1997
GB/T 8704.1-1988EnglishRFQ ASK 3 days [Need to translate] Methods for chemical analysis of ferrovanadium--The infrared absorption method for the determination of carbon content Obsolete GB/T 8704.1-1988

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Basic data

Standard ID GB/T 8704.1-2009 (GB/T8704.1-2009)
Description (Translated English) Ferrovanadium -- Determination of carbon content -- The infrared absorption method and the gasometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H11
Classification of International Standard 77.100
Word Count Estimation 9,953
Date of Issue 2009-07-08
Date of Implementation 2010-04-01
Older Standard (superseded by this standard) GB/T 8704.1-1997
Quoted Standard GB/T 223.69-2008; GB/T 4010
Regulation (derived from) National Standard Approval Announcement 2009 No.9 (Total No.149)
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 the carbon content of vanadium iron method and gas volumetric method using infrared absorption. This section applies to the determination of the carbon content of vanadium and iron. Which range infrared absorption spectrometry (mass fraction): 0. 025% -1. 200 %, measurement range (mass fraction) gas volumetric method: 0. 400% -1. 200 %.

GB/T 8704.1-2009: Ferrovanadium -- Determination of carbon content -- The infrared absorption method and the gasometric 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.
Ferrovanadium.Determination of carbon content.The infrared absorption method and the gasometric method ICS 77.100 H11 National Standards of People's Republic of China Replacing GB/T 8704.1-1997 Determination of carbon content ferrovanadium Infrared absorption method and the gas volumetric method Posted 2009-07-08 2010-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This Part replaces GB/T 8704.1-1997 "Determination of the amount of carbon for chemical analysis of ferrovanadium The infrared absorption method and the gas volumetric method." This portion of the GB/T 8704.1-1997 comparison, the main changes are. --- The method of one of the sample weight is adjusted to 0.500g 0.200g; --- The method of one of the iron from the flux amount was adjusted to 0.50g 0.20g; --- The method of one of the first, second gear allows differential combined carbon content of 0.025% to 0.070% 0.006% allowable difference. 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. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd. The main drafters of this section. should Tang Hua, Fang Yan, Xuexiu Ping. This part of the standard replaces the previous editions are. --- GB/T 8704.1-1988; GB/T 8704.2-1988; GB/T 8704.1-1997. Determination of carbon content ferrovanadium Infrared absorption method and the gas volumetric method Warning --- Use this section shall be a person experiences regular laboratory work. This section does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

This section specifies the determination of the carbon content of vanadium iron method and gas volumetric method using infrared absorption. This section applies to the determination of vanadium iron carbon content. Wherein the infrared absorption method for the determination range (mass fraction). 0.025% - 1.200%; Measurement range (mass fraction) of the gas volumetric method. 0.400% ~ 1.200%.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. Every note has a reference date of the file, which subsequently Some amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to agreements based on this research Study whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 223.69-2008 after carbon and alloy steel - Determination of the pipe furnace combustion gas volumetric method GB/T 4010 alloy chemical analysis and preparation of samples 3 Method One. The infrared absorption method 3.1 Principle The sample is heated in a high frequency induction furnace combustion flow of oxygen, carbon dioxide generated by the oxygen contained in the measuring chamber to the infrared analyzer dioxide CFCs absorb infrared energy of a specific wavelength, which absorbed energy is proportional to the concentration of carbon, based on the energy receiving detector can measure changes in carbon content. 3.2 Reagents and materials 3.2.1 acetone. carbon content of the residue after evaporation of less than 0.0005%. 3.2.2 magnesium perchlorate. anhydrous, granular. 3.2.3 Caustic soda asbestos. granular. 3.2.4 glass wool. 3.2.5 tungsten particles. carbon less than 0.002%, particle size of 0.8mm ~ 1.4mm. 3.2.6 tin particles. carbon content less than 0.002%, particle size 0.4mm ~ 0.8mm. If necessary, apply acetone (3.2.1) clean the surface and in the room Temperature and dried. 3.2.7 pure iron. purity greater than 99.8%, carbon content less than 0.002%, particle size of 0.8mm ~ 1.6mm. 3.2.8 Oxygen. The purity of more than 99.95%, if other levels of oxygen to obtain a low and consistent blank, can also be used. 3.2.9 Power Source gas. nitrogen or compressed air, which contaminants (oil and water) content of less than 0.5%. 3.2.10 porcelain crucible. diameter × height, 23mm × 23mm or 25mm × 25mm, and above 1200 ℃ high temperature furnace 4h or by burning oxygen burning to blank the lowest value. 3.2.11 crucible tongs. 3.3 instruments and equipment 3.3.1 Dingtan infrared absorption instrument (sensitivity of 0.1 × 10-6), which means as shown in Figure 1.

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