摘要
采用在HCl介质中定量加入Na2S2O3溶液，用淀粉作指示剂，过量的Na2S2O3以碘标准溶液进行滴定，间接测定电解金属锰中的硒。方法的加标回收率为92．5％-107．5％，对w（Se）=0．078％的样品进行10次测定的RSD为3．02％，用于实际样品测定，结果与国标法相符。
An indirect iodometric method for the determination of selenium in electrolyzed metal manganese is developed. In hydrochloric acid medium, excess of sodium thiosulfate solution is added and titrated with 12 standard solution in presence of starch as an indicator. The recovery of standard addition is 92.5% - 107.5%. The precision of method for the sample with w（Se） = 0.078% is 3.02% RSD （n = 10）. The method has been applied to the determination of Se in electrolyzed metal manganese and the results are in agreement with those provided by national standard method （GB 8654.6--88 ）.
出处
《岩矿测试》
CAS
CSCD
2006年第1期93-94,共2页
Rock and Mineral Analysis
关键词
硒
电解金属锰
碘量法
间接测定
selenium
electrolyzed metal manganese
iodometric method
indirect determination
