GB/T 14353.10-2010Methods for chemical analysis of copper ores, lead ores and zinc ores - Part 10: Determination of tungsten content (English PDF)

Foreword

GB/T 14353 "copper ores lead ores and zinc ores chemical analysis method" is divided into 18 parts.

--- Part 1. Determination of copper content;

--- Part 2. Determination of lead content;

--- Part 3. Determination of the amount of zinc;

--- Part 4. Determination of cadmium content;

--- Part 5. Determination of nickel content;

--- Part 6. Determination of cobalt content;

--- Part 7. Determination of arsenic content;

--- Part 8. Determination of the amount of bismuth;

--- Part 9. Determination of molybdenum;

--- Part 10. Determination of tungsten;

--- Part 11. determination of silver;

--- Part 12. Determination of sulfur content;

--- Part 13. the amount of gallium, indium and thallium amount for determination;

--- Part 14. Determination of germanium content;

--- Part 15. Determination of the amount of selenium;

--- Part 16. Determination of tellurium content;

--- Part 17. Determination of the amount of thallium;

--- Part 18. the amount of copper, lead content, the amount of zinc, cobalt and nickel content determination.

This section GB/T 14353 Part 10.

This Part replaces GB/T 14353.10-1993 "copper ores lead ores and zinc ores chemical analysis of sulfuric acid - phenyl acetic acid - cinchonine Determination of tungsten content "potassium chlorate catalytic polarography - ning.

Section compared with the GB/T 14353.10-1993, major changes in the following.

--- Increased alert, warnings;

--- Modify the sample drying temperature. Appendix A of this section is an informative annex.

1 Scope

GB/T 14353 provisions of this part of the determination of tungsten content of copper ores lead ores and zinc ores.

This section applies to copper ore, determination of tungsten content of lead ores and zinc ores. Measuring range. 1µg/g ~ 200µg/g of tungsten.

2 Normative references

The following documents contain provisions which, through reference GB/T 14353 in this section constitute provisions of this part of the 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.

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 Principle

Sample decomposition by alkali fusion, hot water extraction. Iron, titanium, cobalt, nickel and other elements and tungsten hydroxide precipitate was separated from the sulfuric acid - phenyl acetic acid - oct Ning - potassium chlorate system, tungsten, a sensitive polarographic catalytic wave. On Polarograph starting potential of -0.5V (to calomel electrode as reference Electrode), the peak potential of about -0.76V (saturated calomel electrode) at the pole with a spectrometer measuring peak current portion of derivative calculate the amount of tungsten.

4 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.

4.1 Sodium peroxide.

4.2 Ethanol.

4.3 Sulfuric acid (11), Warning. Improper dilution can be dangerous.

4.4 Phenylhydroxyacetic acid solution (100g/L).

4.5 Potassium chlorate solution (60g/L).