YS/T 820.14-2012Methods for chemical analysis of laterite nickel ores. Part 14: Determination of zinc content. Flame atomic absorption spectrometry (English PDF)

Foreword

This section drafted in accordance with GB/T 1.1-2009 given rules.

YS/T 820-2012 "Methods for chemical analysis of nickel laterite ore" is divided into 26 parts.

--- Part 1. Determination of nickel content by flame atomic absorption spectrometry;

--- Part 2. Determination of the amount of nickel dimethylglyoxime spectrophotometry;

--- Part 3. Determination of total iron content of dichromate method;

--- Part 4. Determination of phosphorus content - Molybdenum blue spectrophotometric method;

--- Part 5. Determination of cobalt content by flame atomic absorption spectrometry;

--- Part 6. Determination of copper content - Flame atomic absorption spectrometry;

--- Part 7. Determination of calcium and magnesium content by flame atomic absorption spectrometry;

--- Part 8. Determination of the amount of silica silicon potassium fluoride titration;

--- Part 9. scandium, cadmium determination by inductively coupled plasma - mass spectrometry;

--- Part 10. calcium, cobalt, copper, magnesium, manganese, nickel, zinc and phosphorus content - Inductively Coupled Plasma - Atomic Emission Spectrometry;

--- Part 11. Determination of the amount of fluorine and chlorine ion chromatography;

--- Part 12. Determination of manganese content by flame atomic absorption spectrometry;

--- Part 13. Determination of lead content by flame atomic absorption spectrometry;

--- Part 14. Determination of zinc content - Flame atomic absorption spectrometry;

--- Part 15. Determination of cadmium content by flame atomic absorption spectrometry;

--- Part 16. Determination of the amount of carbon and sulfur by high frequency combustion infrared absorption spectroscopy;

--- Part 17. arsenic, antimony, bismuth contents hydride generation - atomic fluorescence spectrometry;

--- Part 18. Determination of mercury content - Cold atomic absorption spectrometry;

--- Part 19. Determination of energy aluminum, chromium, iron, magnesium, manganese, nickel and silicon content dispersive X-ray fluorescence spectrometry;

--- Part 20. Determination of aluminum content EDTA titration;

--- Part 21. Determination of chromium content ammonium ferrous sulfate titration;

--- Part 22. Determination of magnesium content EDTA titration;

--- Part 23. cobalt, iron, nickel, phosphorus, aluminum oxide, calcium oxide, chromium oxide, magnesium oxide, manganese oxide, silicon dioxide and titanium dioxide volume Wavelength dispersive X-ray fluorescence spectrometry;

--- Part 24. Determination of hygroscopic water weight method;

--- Part 25. Determination of combined water content - Gravimetric method;

--- Part 26. Determination of loss on ignition - Gravimetric method.

This section YS/T 820-2012 Part 14.

This method of arbitration analysis.

This standard by the national non-ferrous metals Standardization Technical Committee (SAC/TC243) centralized.

This standard by the Beijing General Research Institute of Mining and Metallurgy, People's Republic of China Bayuquan Exit Inspection and Quarantine, Jinchuan Group Ltd, Drafted.

This section is drafted. Northwest Nonferrous Metal Research Institute, People's Republic of China Bayuquan Exit Inspection and Quarantine.

Participated in the drafting of this section. Guangzhou Nonferrous Metal Research Institute, Beijing General Research Institute of Mining and Metallurgy.

1 Scope

This section YS/T 820 specifies the method for determination of nickel laterite ore of zinc content.

This section applies to the determination of nickel laterite ore of zinc content. Measurement range. 0.010% to 1.00%.

2 Method summary

Sample decomposition with hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid. In dilute hydrochloric acid medium, atomic absorption spectrometer at a wavelength of 213.9nm, Using air - acetylene flame measured absorbance of zinc.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.

3.1 hydrochloride (rho1.19g/mL).

Nitrate 3.2 (rho1.42g/mL).

3.3 Hydrofluoric acid (rho1.15g/mL).

3.4 perchloric acid (rho1.67g/mL).

3.5 hydrochloride (11).

3.6 standard zinc stock solution. Weigh 1.0000g cleaned surface of metallic zinc (wZn>=99.99%) placed in 250mL beaker, add 20mL of hydrochloric acid (3.5) and heated at low temperature to dissolve completely removed, cooled to room temperature. Moved into 1000mL volumetric flask, supplemented with 10mL Hydrochloric acid (3.1), dilute to the mark and mix. 1mL solution containing 1mg zinc.

3.7 Zinc standard solution. Pipette 10.00mL standard zinc stock solution (3.6) was placed in 500mL volumetric flask, was added 10mL of hydrochloric acid (3.1), dilute to the mark and mix. This solution 1mL containing 20µg zinc.

4 Instrument

Atomic absorption spectrometer, with zinc hollow cathode lamp.

Under instrument conditions, who can achieve the following indicators atomic absorption spectrometer can be used.

--- Characteristic concentration. the test solution and measurement matrix consistent solution, characterized in zinc concentration should not exceed 0.02µg/mL;

--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%;

With the lowest standard solution (not a "zero" standard solution) absorbance measured 10 times, and the standard deviation should not exceed the maximum concentration of the standard solution 0.5% was the average absorbance;

--- Linear calibration curves. the curve according to concentration, is divided into five parts, the difference between the absorbance of the absorbance difference between the highest and the lowest segment the ratio should not be less than 0.80.