中和法,是容量分析中常见的一种分析方法。在一种或几种锰盐与酸、碱共存于一种物料中,就不得不考虑锰元素对测定方法的选择。在电解二氧化锰生产过程中,硫酸锰电解液中H_2SO_4含量的测定,以及电解配制液和电解终液中H_2SO_4含量的测定,由于Mn~(2+)离子的存在,使用标准碱液滴定H_2SO_4时,若指示剂采用甲基橙,随着样液酸度的降 Neutralization is a common analytical method in capacity analysis. In one or several manganese salts and acid, alkali coexist in a material, we have to consider the determination of manganese on the choice of method. In the production of electrolytic manganese dioxide, the content of H 2 SO 4 in the manganese sulfate electrolyte and the determination of H 2 SO 4 in the electrolytic solution and the final electrolyte were determined. The presence of Mn 2+ ions was used to titrate H_2SO_4 When methyl orange is used as an indicator, the acidity of the sample decreases