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由于锑易水解,所以不能套用常规的EDTA滴定法来测定锑矿及其选矿产品中的铅。本文于硫酸铅介质中加入酒石酸以抑制锑的水解,同时将沉淀铅的条件稍加改进,使EDTA滴定法测定锑矿及其选矿产品中的铅,得到了良好的结果,该法的操作步骤如下: 称取0.2000克于250毫升烧杯中,加盐酸15毫升,于低温加热10分钟,加硝酸5毫升,加热浓缩至3毫升左右,稍冷,加入硫酸10毫升,加热至冒白烟3分钟。冷却,用硫酸溶液(1+6)5～10毫升吹洗表皿和
Because antimony is readily hydrolyzed, conventional EDTA titration can not be applied to determine lead in antimony ore and its beneficiation products. In this paper, tartaric acid is added to the lead sulfate medium to restrain the hydrolysis of antimony, meanwhile, the conditions for precipitating lead are slightly improved, and the lead titration in the antimony ore and its beneficiation products is determined by the EDTA titration method. The operation procedure As follows: Weigh 0.2000 grams in 250 ml beaker, add 15 ml of hydrochloric acid, heat at low temperature for 10 minutes, add nitric acid 5 ml, heat concentrated to about 3 ml, slightly cold, add sulfuric acid 10 ml, heated to white smoke for 3 minutes . Cooling, with sulfuric acid solution (1 + 6) 5 ~ 10 ml bleach table dish and