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测定钨精砂中的钨和辉钼矿中的钼可用氯化亚铬的电位滴定法来代替经典的重量法。测定钨的实验条件是盐酸浓度保持10N 左右,每160毫升钨的含量不低于1毫克当量。测定钼的条件是盐酸浓度为6N,加入硫氰酸钾约为1克/80毫升。在上述实验条件下,钨、钼都可以用不补偿法在室温下滴定。分析结果基本上与重量法符合,而时间缩减为3小时。
Determination of tungsten in tungsten concentrate and molybdenum molybdenum molybdenum molybdenum chloride can be used in place of the classical gravimetric method of titration. Tungsten determination of experimental conditions is to maintain the concentration of hydrochloric acid about 10N, 160 milliliter tungsten content of not less than 1 milliequivalent. The conditions for the determination of molybdenum is hydrochloric acid concentration of 6N, potassium thiocyanate is added about 1 g / 80 ml. Under the above experimental conditions, both tungsten and molybdenum can be titrated with no compensation at room temperature. The results of the analysis basically coincided with the gravimetric method and the time was reduced to 3 hours.