摘要
进行了控制电位、支持电解质种类等条件选择,使得测定背景电流小,标准偏差低于0.2%,并对样品进行了均匀性、稳定性检验,溶液的有效期为二年。
The selection of conditions on controlled potential,the kinds of supporting electrolyte and so on lessns the background current and makes the standard deviation less than 0.2%. The homogeneity and stability of the sample was determined. The stable period is more than two years at room temperature.
关键词
铁
铅
镉
镍
钴
锌
铬
测定
库仑法
标准溶液
controlled potential coulometry
standard solution
supporting electrolyte
background current
homogeneity,
stability
stable period