title: Determination of silver in alloys by controlled-potential electrolysis at a tantalum electrode.
abstract: A versatile method for the determination of Ag is described. It is based on controlled-potential electrolysis with a tantalum cathode in the presence of lactic acid at pH 2-6. An SCE of double-junction type with sodium formate bridge electrolyte is used as the reference electrode. The role of washing after electrolysis is studied and a novel technique suggested. The standard deviation of the determination is 0.13 mg. A preliminary separation is needed only if W is present. The proposed method has been satisfactorily applied to the analysis of a large number of silver alloys with different compositions.
authors.affiliation: Shanghai Research Institute of Materials, MMBEI, Shanghai, People's Republic of China.
authors.forename: N
authors.initials: N
authors.lastname: Zhou
authors.forename: M
authors.initials: M
authors.lastname: Zhou
authors.forename: C X
authors.initials: CX
authors.lastname: He
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Ju
authors.forename: L F
authors.initials: LF
authors.lastname: Lin