测定银铜合金中高含量银(40～50%),工厂中大多用硫氰酸铵滴定法和氯化银重量法。前者精度较差,后者需洗涤过滤,测定时间较长。用于工厂较准确的方法为控制电位电解法。本文使用内电解法及原子吸收法联合测定银。用的内电解法装置是无保护膜的,在大部分银镀在铂网电极上时就结束,这就缩短了测定时间,少量 Silver-copper alloy determination of high levels of silver (40 ~ 50%), most of the factory with ammonium thiocyanate titration and silver chloride gravimetric method. The former accuracy is poor, the latter need to wash filter, measuring time longer. The more accurate method used in the factory is control of potential electrolysis. This article uses the internal electrolysis method and atomic absorption method for the determination of silver. The internal electrolysis device used is unprotected and ends when most of the silver is plated on the platinum mesh electrode, which shortens the measurement time and a small amount