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Chemical Phase Analysis of Arsenic-Containing Nickel Ore
For the nickel-containing ore, China requires determination of nickel, nickel arsenic minerals (mineral sulfur nickel) and silicate minerals. Nickel is insoluble in water and soluble in acetic acid. In order to prevent the formation of Fe 3+ to dissolve nickel arsenide minerals, a small amount of ascorbic acid should be added. Separation of nickel arsenide minerals from silicate minerals can be found in the relevant literature.
 Determination of Nihuahua Weigh 0.1000-0.5000 samples into a shrinking beaker, add 50mL of 3g / L ascorbic acid - 5% acetic acid, immerse in boiling water bath for 15min, filter, wash. Nickel was measured in the filtrate.
Determination of nickel arsenide minerals and silicate minerals refer Info saturated bromine water method.