GB/T 14352.3-2010Methods for chemical analysis of tungsten ores and molybdenum ores - Part 3: Determination of copper content (English PDF)

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 3.

This Part replaces GB/T 14352.3-1993 "tungsten ores and molybdenum ores - Methods for chemical analysis by flame atomic absorption spectrophotometry The amount of copper. " Section compared with the GB/T 14352.3-1993, major changes in the following.

--- Increased alert, warnings;

--- Modify the sample drying temperature.

Appendix A of this section is an informative annex.

Warning. Use of this section a person shall be regular laboratory work experience. 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 14352 provides for tungsten ores and molybdenum ores in the determination of copper content.

This Part applies to tungsten ores and determination of molybdenum copper in the ore. Measurement range. from 0.001% to 5% of copper.

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 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

Samples with hydrochloric acid, nitric acid, hydrofluoric acid, perchloric acid decomposition in hydrochloric acid medium, using air - acetylene flame atomic absorption spectrophotometry The meter, the wavelength at 324.7nm, copper measuring absorbance, calculate the amount of copper.

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 Hydrochloride (rho1.19g/mL).

4.2 Nitrate (rho1.42g/mL).

4.3 Hydrofluoric acid (rho1.13g/mL), Warning. Toxic and corrosive hydrofluoric acid, the operation should wear gloves to prevent skin contact.

4.4 Perchloric acid (rho1.67g/mL), Warning. explosive materials, careful.

4.5 Hydrochloride (11).

4.6 Hydrochloric acid (595).

4.7 Nitric acid (11).

4.8 Copper Standard solution.