A method for analyzing arsenic in ore samples
An analysis method, ore sample technology, is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions. It can solve problems such as the difficulty of arsenic determination, and achieve reduced reducing acidity and good accuracy. performance, precision, and improved operating conditions
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Embodiment 1
[0017] Weigh 0.5065g of sample into a beaker, add 20ml of nitric acid and 0.5g of potassium chlorate, heat to dissolve for 10min, cool slightly, add 7.5ml of sulfuric acid, continue to heat to dissolve and evaporate to smoke of sulfur trioxide for 5 minutes, after cooling to room temperature, add 30ml of water and 0.1g of copper sulfate, boil to dissolve the salts, and cool slightly. Add 10ml hydrochloric acid, then add sodium hypophosphite to Fe 3+ The yellow color fades away completely, and an excess of 2g is added, boiled, and kept at a slight boil for 50 minutes, so that the arsenic precipitates and coagulates. Knead a small ball with absorbent cotton and stuff it in the funnel, while filling the funnel neck with water. Filter the arsenic precipitate, wash the beaker and the precipitate 4-5 times each with hydrochloric acid (1+3) solution containing sodium hypophosphite, then wash the beaker 3-4 times with 5% ammonium chloride solution, and check the filtered out with pH ...
Embodiment 2
[0019] Weigh 0.1066g of sample into a beaker, add 20ml of nitric acid and 0.5g of potassium chlorate, heat to dissolve for 10min, cool slightly, add 7.5ml of sulfuric acid, continue to heat to dissolve and evaporate to smoke of sulfur trioxide for 5 minutes, after cooling to room temperature, add 30ml of water and 0.1g of copper sulfate, boil to dissolve the salts, and cool slightly. Add 10ml hydrochloric acid, then add sodium hypophosphite to Fe 3+ The yellow color fades away completely, and an excess of 2g is added, boiled, and kept at a slight boil for 50 minutes, so that the arsenic precipitates and coagulates. Knead a small ball with absorbent cotton and stuff it in the funnel, while filling the funnel neck with water. Filter the arsenic precipitate, wash the beaker and the precipitate 4-5 times each with hydrochloric acid (1+3) solution containing sodium hypophosphite, then wash the beaker 3-4 times with 5% ammonium chloride solution, and check the filtered out with pH ...
Embodiment 3
[0021] Weigh 0.1023g of sample into a beaker, add 20ml of nitric acid and 0.5g of potassium chlorate, heat to dissolve for 10min, cool slightly, add 7.5ml of sulfuric acid, continue to heat to dissolve and evaporate to smoke of sulfur trioxide for 5 minutes, after cooling to room temperature, add 30ml of water and 0.1g of copper sulfate, boil to dissolve the salts, and cool slightly. Add 10ml hydrochloric acid, then add sodium hypophosphite to Fe 3+ The yellow color fades away completely, and an excess of 2g is added, boiled, and kept at a slight boil for 50 minutes, so that the arsenic precipitates and coagulates. Knead a small ball with absorbent cotton and stuff it in the funnel, while filling the funnel neck with water. Filter the arsenic precipitate, wash the beaker and the precipitate 4-5 times each with hydrochloric acid (1+3) solution containing sodium hypophosphite, then wash the beaker 3-4 times with 5% ammonium chloride solution, and check the filtered out with pH ...
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