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高含量的锌大多用浓氨分离后进行络合滴定。此法操作较长,铁、锰含量高时,一次分离吸附很严重,同时分离锰也不易掌握。为了提高分析速度,在文献[1,2]工作基础上利用生成硫酸铅钾复盐分离铅,以甲基百里酚兰或半二甲酚橙为指示剂进行锌的络合滴定。本法手续简单,操作方便,容易掌握,结果准确,节省时间,适用于含锌2％以上的锌矿、锌精矿及合金中锌的测定。一、主要试剂的配制
High concentrations of zinc are mostly concentrated ammonia separation after complexometric titration. This method of operation is longer, iron, manganese content is high, a separation of adsorption is very serious, while separation of manganese is not easy to grasp. In order to improve the speed of analysis, lead was separated from lead by potassium sulfate based on literature work [1, 2], and the complexation titration of zinc with methyl thymol blue or half-xylenol orange as indicator. This procedure is simple, easy to operate, easy to grasp, the result is accurate and saves time, suitable for zinc ore containing more than 2% zinc, zinc concentrate and alloy zinc determination. First, the preparation of the main reagent