This paper introduced the indirect determination of polyphosphate in laundry powder by potentiometrictitration, the method is featured of simple, rapid and reliable.
用强酸分解洗衣粉中的聚磷酸盐，以电位滴定法间接测定其中的聚磷酸盐含量。
2
During the production, determination of SO_2 (sulphur dioxide) in dry red wine using potentiometrictitration avoids the end-point recognition difficulty compared with using iodometry method.
在生产中利用电位滴定法测定干红葡萄酒中SO_2的含量，避免了直接碘量法终点识别的困难。
3
A new method for determining vitamin B1 with the two-point potentiometrictitration was established.