YS/T 820.12-2012Methods for chemical analysis of laterite nickel ores. Part 12: Determination of manganese 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 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 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 12.

This method is a method of 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 specifies the method for the determination of manganese content of nickel laterite ore.

This section applies to the determination of the amount of manganese in the nickel laterite ore. Measurement range. 0.050% to 1.00%.

2 Method summary

After the sample with hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid decomposition, and hydrochloric acid soluble salts. 2% hydrochloric acid medium, atomic absorption spectroscopy Wavelength 279.5nm at using air - acetylene flame to deduct the background absorbance measured as manganese, calculate the amount of manganese.

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 (rho1.40g/mL).

3.3 Hydrofluoric acid (rho1.13g/mL).

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

3.5 hydrochloride (11).

3.6 hydrochloride (298).

3.7 manganese standard stock solution. Weigh 1.0000g of manganese metal (wMn>=99.95%) placed in 250mL beaker, add 20mL hydrochloric acid (3.5), dissolved by heating, and evaporated to dryness, dissolved with the amount of hydrochloric acid (3.6), cooled to room temperature, transferred to 1000mL volumetric flask with hydrochloric acid (3.6) diluted to the mark, and mix. 1mL solution containing 1mg manganese.

3.8 Manganese standard solution. Pipette 10.00mL manganese standard stock solution (3.7) placed in 100mL flask with hydrochloric acid (3.6) diluted to the mark Degree, and mix. This solution 1mL containing 100µg manganese.

4 Instrument

Atomic absorption spectrometer, with a manganese 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, the characteristic concentration of manganese should not exceed 0.054µg/mL;

--- Precision. measure 10 times the absorbance of the highest concentration of the standard solution, the standard deviation should not exceed 1% of the average absorbance; with the lowest concentration of standard solution (not a "zero" standard solution) absorbance measured 10 times, and the standard deviation should not exceed the maximum concentration 0.5% of the mean absorbance of the standard solution;

--- Linear curve. 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 Ratio of not less than 0.70.