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提出了用络合滴定法测定混合金属离子．以汞膜电极为指示电极，银－氯化银电极为参比电极，以标准ＥＤＴＡ溶液滴定混合金属离子溶液．采集一系列指定电位点处滴定剂的体积，并以主成分回归法处理滴定数据．利用本文方法对铜、锌、铅、钴混合溶液进行了测定，结果满意．
Proposed by complexometric titration mixed metal ions. Mercury film electrode as the indicator electrode, silver - silver chloride electrode as the reference electrode, titration with standard EDTA solution mixed metal ion solution. The volume of titrant at a series of designated potential points was collected and the titration data were processed using principal component regression. The copper, zinc, lead and cobalt mixed solutions were measured by this method and the results were satisfactory.