校正峰电位漂移偏最小二乘极谱催化波同时测定轻稀土  

Simultaneous Determination of Light Rare Earth with the Drift of Peak Potential Corrected by Partial Least Squares in Polarography

作　　者：张凤君[1] 马玖彤[2] 张平[1] 

机构地区：[1]北京师范大学环境科学研究所环境模拟与污染控制国家重点实验室,北京100875 [2]吉林大学化学系,长春130026

出　　处：《分析化学》2002年第1期31-33,共3页Chinese Journal of Analytical Chemistry

摘　　要：应用Ｍ２７３．Ａ电化学系统中的线性扫描技术，确定了８．０×１０－５ｍｏｌ／Ｌ二甲酚橙及ｐＨ４．０ＨＡｃ－ＮａＡｃ缓冲体系为偏最小二乘极谱法同时测定Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ的最佳极谱体系。６种稀土元素的线性范围均在１．０× １０－７～１．２ × １０－５ｍｏｌ／Ｌ。并对极谱峰电位随浓度漂移进行了校正，提高了方法的准确度。Some conditions for the simultaneous determination of La, Ce, Pr, Nd, Sm and Eu were studied with linear sweep voltammetry using M273A electrochemical system and partial least squares. The experimental results showed that the optimum electrolyte for the simultaneous determination of La, Ce, Pr, Nd, Sm and Eu was 8.0 x 10(-5) mol/L xylenol orange and pH = 4.0 HAc-NaAc buffer solution. All the linear ranges of these elements were 1.0 x 10(-7) mol/L to 1.2 x 10(-5) mol/L. The accuracy was improved a lot when the drift of peak potential was corrected with the concentration.

关 键 词：极谱峰 电位漂移 偏最小二乘法 轻稀土 测定 极谱 催化波 极谱法 分析 

分 类 号：O657.14[理学—分析化学]