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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2002年第1期31-33,共3页
Chinese Journal of Analytical Chemistry