酸浸液中硫酸含量检测指示剂的改进

Improvement of detection indicator for sulfuric acid in acidic leaching solution

本试验通过研究,确定了一种适合酸浸液中硫酸含量检测的混合指示剂,并确定了该混合指示剂的最佳用量,该指示剂指示终点变色非常灵敏,对硫酸含量分别为2. 5%和4. 5%的酸浸液进行加标回收和精密度试验,测得回收率在99.5%～101. 5%之间,相对标准偏差小于1.5%。

A mixed indicator was found to detect the sulfuric acid content in acidic leaching solution through experimental research, the optimum dosage of the mixed indicator was determined. The indicator was sensitive to the terminus color changing. The acidic leaching solution of 2. 5% and 4. 5% sulfuric acid content was marked to recover and the accuracy was determined, and the recovery rate measured was between 99. 5% and 101. 5%,1. 5% less than the standard deviation.