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镍的测定方法有丁二肟重量法、光度法和EDTA容量法。铜的测定方法亦有光度法,容量法和重量法等。自1959年Bhatt首先用二乙基二硫代氨基甲酸钠(NaDDC)电位滴定法测定了包括Ca~(2+)、Cd~(2+)、Pb~(2+)等在内的金属离子,以后亦有人作过类似工作。笔者在报导中,用硫化银电极为指示电极,利用NaDDC为滴定剂,电位滴定法测定了铜基合金中的铜等。但尚未见用此方法连续滴定实际样品中的铜和镍报导。本文提出用铜离子选择电极作指示电极,在适当的浓度的乙醇介质中,用NaDDC为滴定剂,连续电位滴定铝合金中的铜和镍或单独测定铜或镍。大量的铝及小量的铁可用
Nickel determination of butyl dioxime weight method, photometry and EDTA volumetric method. Copper determination methods are also luminosity, volumetric method and gravimetric method. Since 1959, Bhatt first determined the metal ions including Ca2 +, Cd2 +, Pb2 + with sodium dithiocarbamate (NaDDC) potentiometric titration method, Someone later made similar work. The author in the report, with silver sulfide electrode as the indicator electrode, the use of NaDDC as titrant, potentiometric titration of copper in copper-based alloys. However, continuous titration of copper and nickel in actual samples by this method has not been reported yet. In this paper, we propose to use copper ion selective electrode as the indicator electrode, titrate the copper and nickel in the aluminum alloy continuously by potentiometric titration with NaDDC in a proper concentration of ethanol medium, or separate the determination of copper or nickel. A lot of aluminum and a small amount of iron is available