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近年来，利用双试剂的协同显色反应测定钛已有不少报道~［１～４］，而本文所述体系则未见报道。试验发现，在ＯＰ存在时，在ｐＨ５的乙酸一乙酸钠缓冲溶液中，钛（ＩＶ）与邻苯二酚紫和罗丹明６Ｇ形成络合比１：２：２的红色三元络合物。据此拟定的方法用于合金中钛（ＩＶ）的
In recent years, the synergistic color reaction using two reagents has been reported in many reports ~ [1 ~ 4], but the system described in this article has not been reported. It was found that in the presence of OP, titanium (IV) forms a red ternary complex with a complex ratio of 1: 2: 2 with catechol violet and rhodamine 6G in pH5 sodium acetate monoacetate buffer solution. The proposed method is used for titanium (IV) in alloys