自动电位滴定法测定硼矿酸解液中的硼酸含量

Determination of boric acid in solution of acidulation process by automatic potentiometric titration

采用自动电位滴定法测定硼矿酸解液中的硼酸含量。当硼酸质量为7.20~45.00 mg时,自动电位滴定法的测量相对误差小于1%,加标回收率为100.85%,比手工滴定法测量的准确度高。8次平行实验的相对标准偏差为0.18%,测量重复性较好。因此,用自动电位滴定法测定硼矿酸解液中的硼酸含量是可行的。

Determination of boric acid in the solution of acidulation process was carried out by automatic potentiometric titration. The automatic potentiometrie titration method was more accurate than the manual titration method with a relative error of less than 1% and a standard sample recovery rate of 100.85% when the mass of boric acid was at 7.20--45.00 mg.The relative standard deviation of 8 parallel determinations was 0.18% indicating a good reproducibility of the automatic potentiometric titration method.It was feasible to determine the content of boric acid by automatic potentiometric titration.