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本文用同一试剂对乙酰基偶氮氯膦（ＣＰＡｐＡ）分别测定了铈组稀土及铈组稀土和钇的总量。在盐酸介质中，混合表面活性剂氯化十六烷基吡啶（ＣＰＣ）和乳化剂ＯＰ增敏铈组稀土和ＣＰＡｐＡ的反应，而大量钇被胶束掩蔽。表面活性剂不存在时，在铈组稀土和钇的等吸收点（６９２ｍｍ）测定其总量，样品中稀土组成的变化不影响结果。用本法测定了镍基合金中铈组稀土和稀土总量，结果良好。
In this paper, the total amount of rare earths and yttriums in rare earth and cerium group of cerium group was measured by the same reagent for acetyl chlorophosphonazo (CPApA). In hydrochloric acid medium, the mixed surfactant cetyl pyridinium chloride (CPC) and emulsifier OP sensitized the reaction of rare earth cerium group and CPApA, and a large amount of yttrium was concealed by micelles. In the absence of surfactant, the total amount of rare earth and yttrium in the cerium group is measured at the same absorption point (692 mm), and the change in composition of the rare earth in the sample does not affect the result. The total amount of rare earths and rare earths in the cerium group in the nickel-based alloy was measured by this method and the result was good.