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GB/T 223.43-2008 English PDF

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GB/T 223.43-2008: Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method
Status: Valid

GB/T 223.43: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 223.43-2008English279 Add to Cart 3 days [Need to translate] Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method Valid GB/T 223.43-2008
GB/T 223.43-1994English319 Add to Cart 3 days [Need to translate] Methods for chemical analysis of iron, steel and alloy. Determination of tungsten content Obsolete GB/T 223.43-1994
GB 223.43-1985EnglishRFQ ASK 3 days [Need to translate] Methods for chemical analysis of iron, steel and alloy--The cinchonine gravimetric method for the determination of tungsten content Obsolete GB 223.43-1985

PDF similar to GB/T 223.43-2008


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Basic data

Standard ID GB/T 223.43-2008 (GB/T223.43-2008)
Description (Translated English) Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H11
Classification of International Standard 77.080.01
Word Count Estimation 12,141
Date of Issue 2008-05-13
Date of Implementation 2008-11-01
Older Standard (superseded by this standard) GB/T 223.43-1994
Quoted Standard GB/T 223.12; GB/T 223.14; GB/T 223; 26; GB/T 6379.1; GB/T 6379.2; GB/T 20066
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 gravimetric method with cinchonine four chlorinated benzene and arsenic-thiocyanate-chloroform extraction spectrophotometric spectrophotometric determination of tungsten content. This section cinchonine weight method is suitable for alloy steel, temperature alloys and precision determination of the mass fraction of the alloy from 1. 00% to 22. 00% tungsten content. This section tetra phenylarsonic-thiocyanate-chloroform extraction spectrophotometry for carbon steel, alloy steel and high temperature alloys for the determination of the mass fraction of 0. 050% ~ 1. 50% tungsten content.

GB/T 223.43-2008: Iron, steel and alloy -- Determination of tungsten content -- Gravimetric method and spectrophotometric method


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Iron, steel and alloy. Determination of tungsten content. Gravimetryc method and spectrophotometric method ICS 77.080.01 H11 National Standards of People's Republic of China Replacing GB/T 223.43-1994 Determination of tungsten content of steel and alloy Gravimetric method and spectrophotometry 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

Foreword

GB/T in this part 223 instead of the GB/T 223.43-1994 "steel and alloy chemical analysis method for determining the amount of tungsten." This portion of the GB/T 223.43-1994 compared primarily with the following modifications. --- Name to "Determination of tungsten steel and alloy content gravimetric method and spectrophotometry"; --- Increased water analysis reagents and instructions to modify the content and concentration of representation; --- Modified Weigh Sample volume represented; --- Modify the results of the formula in the amount of representation; --- Change the specification for precision functional description. Appendix A of this section is informative appendix. This part is proposed by the China Iron and Steel Association. This part of the National Steel Standardization Technical Committee. This section drafted by. Institute of Metal Research, Daye steel mills. The main drafters of this section. Zhu Yuejin, Xu Zaishan. This part of the standard replaces the previous editions are. --- GB 223.43-1985, GB 223.43-1994; --- GB 223.44-1985. Determination of tungsten content of steel and alloy Gravimetric method and spectrophotometry 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 Scope

This section GB/T 223 requirements using cinchonine gravimetric and tetrakis phenylarsonic - thiocyanate - chloroform extraction photometric measurements Set tungsten content. This section cinchonine gravimetric method is suitable for steel, high temperature alloys and precision alloys mass fraction of 1.00% - 22.00% of the amount of tungsten Determination. This section tetrakis phenylarsonic - thiocyanate - chloroform extraction spectrophotometric method for carbon steel, alloy steel and high temperature alloys mass fraction To determine the number of 0.050% to 1.50% tungsten content.

2 Normative references

The following documents contain provisions which, through reference GB/T 223 of this text, constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 223.12 Methods for chemical analysis of iron, steel and alloys of sodium carbonate separation - diphenyl hydrazine spectrophotometric determination of chromium content GB/T 223.14 Methods for chemical analysis of iron, steel and alloys, tantalum reagent extraction and spectrophotometric determination of vanadium content Spectrophotometric determination of molybdenum content GB/T 223.26 Methods for chemical analysis of iron, steel and alloy The thiocyanate direct GB/T 6379.1 measurement methods and results of Accuracy (trueness and precision) - Part 1. General principles and definitions GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the weight of a standard measurement method The basic method of refolding and reproducibility GB/T 20066 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method

3 a method cinchonine gravimetric method

3.1 Principle Free samples of niobium. In the hydrochloric acid solution, the nitric oxide, tungsten formed precipitate tungstate, tungsten caprylate Ning complete precipitation, filtration, burning After the addition of silicon with hydrofluoric acid vaporized, burning to constant, that is impure tungsten trioxide quality. Containing niobium samples. the niobium pentoxide and tungsten trioxide precipitated with sodium carbonate melt, after separating agent magnesium niobate by precipitation, and then β- naphthol quinoline Rhodamine B or precipitation of tungsten, burning to constant as an impure quality tungsten trioxide. Tungsten trioxide impure molten sodium carbonate, and filtered. Filtrate molybdenum, chromium, vanadium, respectively spectrophotometric determination of correction. Shen filter paper Lake iron, titanium and other impurities, burning into oxides after weighing. These oxides by subtracting the mass of impure tungsten trioxide mass, that was pure ozone Tungsten quality. 3.2 Reagents Unless otherwise indicated, the analysis uses only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 3.2.1 anhydrous sodium carbonate. 3.2.2 nitrate, ρ about 1.42g/mL.

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