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一、应用此法应用于分析含钙很少的铅矿最为满意,含氧化钙10％左右者亦可,因钙在这种含量之下,铅为硫酸铅,过滤后钙则变成硫酸钙,溶于100c.c.之酸液中。若有多量的氧化钙存在,在溶解硫酸铅时只要多稀释一下即可无严重影响,硫酸钡后来即可变成草酸盐留于溶液中。开始时钡与铅或多或少会生成重硫酸盐,铅却不能完全变成碳酸盐,若不照下面方法用盐酸处理硫酸盐,使化合物分解则所得结果品位将会低于实际。
First, the application of this method is applied to the analysis of lead-free calcium is most satisfied with about 10% of calcium oxide can also be, because of this content of calcium, lead is lead sulfate, filtered calcium becomes calcium sulfate , Soluble in 100c.c. acid. If a large amount of calcium oxide is present, there is no serious effect as long as more dilution is obtained when dissolving lead sulfate, and barium sulfate can later become oxalate in the solution. The beginning of barium and lead more or less will produce heavy sulfate, lead can not be completely converted to carbonate, if not treated with the following method of hydrochloric acid sulfate, the decomposition of the compound will result lower than the actual grade.