1.加碘化钾于亚硒酸溶液,释出的碘用电解产生的亚锡滴定。在毫克量硒的滴定,可用不补偿电势法和永停法指示终点,误差约0.1%。测定约1微克的硒,只能用永停法和Cooke 等的平衡法,而以后者比较灵敏。2.用电泳法分离出铜阳极泥中的硒,然后进行库仑滴定,结果与重量法相符,而分析时间节省颇多。 1. Add potassium iodide in selenious acid solution, released iodine with electrolytic tin-titration. The titration of the amount of selenium can be used to compensate for the potential method and the permanent stop method to indicate the end point, the error of about 0.1%. Determination of about 1 microgram of selenium, only Yong stop method and Cooke balance method, which is more sensitive. 2. Electrophoresis separation of selenium in the copper anode slime, and then coulometric titration, the results and gravimetric method, and the analysis of a lot of time savings.