GB/T 14352.7-2010Methods for chemical analysis of tungsten ores and molybdenum ores - Part 7: Determination of cobalt content (English PDF)
钨矿石、钼矿石化学分析方法 第7部分：钴量测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 10, 2010
Implementation date
February 1, 2011
Scope
GB/T 14352.7-2010 is the English-translated version of 钨矿石、钼矿石化学分析方法 第7部分：钴量测定.
GB/T 14352.7-2010 is Part 7 of the Chinese GB/T 14352 series and tells laboratories how to determine the cobalt content of tungsten ores and molybdenum ores.
It covers two routes: dimethylglyoxime-sulfosalicylic acid-ammonia-ammonium chloride polarography, from 5 µg/g to 500 µg/g of cobalt, and flame atomic absorption spectrophotometry, from 10 µg/g to 1 000 µg/g.
For the polarographic method it describes the principle, alkali fusion, separation of cobalt, nickel and iron as hydroxides from zinc, tungsten, molybdenum, tin, arsenic, vanadium and chromium, removal of most of the iron on a tributyl phosphate extraction resin and measurement of the catalytic peak near -1.14 V against a saturated calomel electrode, and it lists the reagents and their concentrations.
It replaces GB/T 14352.7-1993, was issued on 10 November 2010 and has applied since 1 February 2011.
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Document preview — GB/T 14352.7-2010
National Standard of the People's Republic of China
- ICS
- 73.060
- Classification
- D 40
- Replacing
- GB/T 14352.7-1993
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Dimethylglyoxime - sulfosalicylic acid - ammonia - ammonium chloride polarography
Foreword
GB/T 14352 "tungsten ores and molybdenum ores chemical analysis methods," a total of 18 parts.
--- Part 1. Determination of tungsten;
--- Part 2. Determination of molybdenum;
--- Part 3. Determination of copper content;
--- Part 4. Determination of lead content;
--- Part 5. Determination of the amount of zinc;
--- Part 6. Determination of cadmium content;
--- Part 7. Determination of cobalt content;
--- Part 8. Determination of nickel content;
--- Part 9. Determination of sulfur content;
--- Part 10. Determination of arsenic content;
--- Part 11. Determination of the amount of bismuth;
--- Part 12. determination of silver;
--- Part 13. Determination of tin;
--- Part 14. Determination of gallium;
--- Part 15. Determination of germanium content;
--- Part 16. Determination of the amount of selenium;
--- Part 17. Determination of tellurium content;
--- Part 18. Determination of the amount of rhenium.
This section GB/T 14352 Part 7.
This Part replaces GB/T 14352.7-1993 "tungsten ores and molybdenum ores chemical analysis method in dimethylglyoxime - sulfosalicylic acid - ammonium hydroxide - Determination of cobalt content "ammonium chloride Polarography.
Section compared with the GB/T 14352.7-1993, major changes in the following.
--- Method for increasing flame atomic absorption spectrometric method for the determination of cobalt content;
--- Increased alert, warnings;
--- Modify the sample drying temperature.
Appendix A of this section is an informative annex.
1 Scope
This section GB/T 14352 provides for tungsten ores and molybdenum ores in the determination of cobalt content.
This Part applies to tungsten ores and determination of cobalt content of molybdenum ore.
Measurement range. Polarography 5µg/g ~ 500µg/g of cobalt, flame atomic absorption spectrophotometry 10µg/1000µg/g of cobalt g ~.
2 Normative references
The following documents contain provisions which, through reference GB/T 14352 in this section constitute provisions of this section. For dated reference documents, 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 6379.2 measurement methods and results accuracy - Part 2: Determination of repeatability and reproducibility of test methods based standard This method
Laboratory use specifications and test methods GB/T 6682 Analysis
GB/T 14505 method for chemical analysis of rocks and ores General rules and regulations
3 Dimethylglyoxime - sulfosalicylic acid - ammonia - ammonium chloride polarography
3.1 Principle
Sample by alkali fusion, the flooding, nickel, cobalt, iron, etc. in the hydroxide precipitate can be isolated and zinc, tungsten, molybdenum, tin, arsenic, vanadium, chromium and other elements. in Hydrochloric acid medium, with tributyl phosphate extraction resin separation and most of the iron in ammonia - ammonium chloride - sulfosalicylic acid - base solution of dimethylglyoxime, peak potential About -1.14V (saturated calomel electrode), by catalytic peak current value of cobalt and dimethylglyoxime generated by oscillopolarography derivative portion is calculated Cobalt content.
3.2 Reagents
Unless otherwise stated in this section are consistent with the use of analytical reagent and GB/T 6682 analytical laboratory use in the analysis.
3.2.1 Sodium peroxide.
3.2.2 Sodium hydroxide.
3.2.3 Tributyl phosphate extraction resin (also available Polytrifluorochloroethylene - tributyl phosphate homemade, see Appendix A.1).
3.2.4 Perchloric acid (rho 1.67g/mL), Warning: explosive materials, careful.
3.2.5 Ethanol.
3.2.6 Hydrochloric acid (11).
3.2.7 Hydrochloric acid (199).
3.2.8 Sodium hydroxide solution (10g/L).
3.2.9 sulfosalicylic acid solution c [(HO) (C6H3COOH) SO3H · 2H2O] = 2mol/L.
3.2.10 Ammonia solution (11).
3.2.11 Ammonium chloride solution c (NH4Cl) = 5mol/L.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 6379.2Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
- GB/T 6682Water for analytical laboratory use - Specification and test methods
- GB/T 14505Method for chemical analysis of rocks and ores - General rules and regulations
Similar standards
Editions of GB/T 14352.7
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 14352.7-2010 | Methods for chemical analysis of tungsten ores and molybdenum ores - Part 7: Determination of cobalt content | current edition | Current |
| GB/T 14352.7-1993 | Methods for chemical analysis of tungsten ores and molybdenum ores - Part 7: Determination of cobalt content | previous edition | Superseded |
This page sells the current edition, GB/T 14352.7-2010. Earlier editions are listed for reference only.
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Related Standards
GB/T 14505-2010 — Method for chemical analysis of rocks and ores - General rules and regulations
GB/T 6379.2-2004 — Measurement methods and results -- Accuracy (trueness and precision) -- Part 2: Determine the standard methods of measurement repeatability and reproducibility of the basic method
GB/T 6379.2-2026 — Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
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