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本文研究了用铅离子选择电极为指示电极,通过EDTA和KF的选择络合性与置换,间接电位滴定铅—钛二元混合物,同时对铜矿、铜合金和石灰石样品中的Al、Ti进行了测定,得到了较为满意的结果。对选择性置换剂KF的用量及置换条件进行了研究;对滴定体系的pH值、滴定介质、滴定剂的浓度、缓冲剂种类及用量对滴定终点的影响、多种共存离子的干扰也进行了试验。
In this paper, the lead ion selective electrode was used as the indicator electrode. The selectivity and exchangeability of EDTA and KF were selected. The lead-titanium binary mixture was titrated indirectly by potentiometric titration. At the same time, Al, Ti in copper, copper alloy and limestone samples The determination, has been more satisfactory results. The amount of KF and the substitution conditions were studied. The influence of titration system pH, titration media, concentration of titrant, buffer type and dosage on the endpoint of titration and interference of various coexisting ions were also studied test.