YS/T 820.6-2012Methods for chemical analysis of laterite nickel ores. Part 6: Determination of copper 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. calcium oxide, magnesium oxide content - Flame atomic absorption spectrometry;

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

--- Part 9. scandium, cadmium content - 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. carbon, sulfur content was measured 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 by EDTA titration;

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

--- Part 22. Determination of magnesium content - EDTA complexometric 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 6. This section arbitration.

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.

1 Scope

This section YS/T 820 provides for the determination of copper content of nickel laterite ore.

This section applies to the determination of copper content of nickel laterite ore. Measurement range. 0.010% to 0.50%.

2 Method summary

Sample decomposition with hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid. Salts dissolved in nitric acid, in dilute nitric acid medium atomic absorption spectrometer wave 324.8nm at length, using air - acetylene flame, copper measuring absorbance, calculate the amount of copper.

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 nitric acid (11).

3.6 copper standard stock solution. Weigh 1.0000g copper (wCu>=99.99%) placed in 400mL beaker, 50mL nitric acid (3.5) to dissolve completely get rid of nitrogen oxides and heated to boiling, cooled to room temperature and removed, transferred to 1000mL volumetric flask, dilute to the mark with water Degree, and mix. 1mL solution containing 1mg of copper.

3.7 Copper Standard Solution. Pipette 10.00mL copper standard stock solution (3.6) were placed in 100mL volumetric flask, was added 5mL of nitric acid (3.2), dilute to the mark, and mix the solution 1mL containing 100µg copper.

4 Instrument

Atomic absorption spectrometer, with copper hollow cathode lamp.

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

--- Characteristic concentration. the test solution is consistent with the measurement of the solution, it features copper concentration should be less than 0.022µg/mL.

--- Precision. measure 10 times the absorbance of the highest concentration of the standard solution, 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.