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以对乙酰基偶氮氯膦（ＣＰＡＰＡ）为显色剂，研究了同时测定Ｃｅ和Ｙ的最佳条件。由于二者吸收光谱严重重叠，本文运用偏最小二乘法实现了Ｃｅ和Ｙ的同时测定，结果满意。
The optimum conditions for simultaneous determination of Ce and Y were studied by using p-acetyl-chlorophosphonazo (CPAPA) as chromogenic reagent. Due to the serious overlap of the two absorption spectra, the simultaneous determination of Ce and Y was achieved by partial least square method with satisfactory results.