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运用２７３Ａ 电化学系统确定了偏最小二乘计算极谱法同时测定Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ 、Ｅｕ 分量的最佳体系为：０．０８ ｍ Ｌ的ＸＯ（浓度为０．０１ ｍ ｏｌ／Ｌ）、ｐＨ＝ ４．０ 的ＨＡＣＮａＡＣ缓冲溶液６ ｍ Ｌ。６ 种轻稀土在１．０×１０－ ７～８．０×１０－ ６ｍ ｏｌ／Ｌ的浓度范围内有良好的线性关系，每种稀土元素的检出限为１．４×１０－ ８ｍ ｏｌ／Ｌ。６ 种轻稀土的相对标准偏差为６．７％～１２．８％ 。
The optimal system for the simultaneous determination of La, Ce, Pr, Nd, Sm and Eu by partial least squares calculation with 273A electrochemical system was determined as follows: 0.08 m L of XO (0.01 mol / L), HACNaAC buffer solution pH = 4.0 6 m L. The six light rare earths have a good linear relationship in the concentration range of 1.0 × 10-7 ~ 8.0 × 10-6mol / L, the detection limit of each rare earth element is 1.4 × 10-8mol / L. The relative standard deviations of the six light rare earths ranged from 6.7% to 12.8%.