Simultaneous Determination of Pb and Cd Ions with Ion Selective Electrodes Based on Multiple Linear Regression

Heavy metals do great harm to human body. Usually it is concluded that Pb and Cd ion selective electrodes are not abele be used simultaneously because of international interference of Pb²⁺ and Cd²⁺ ion. In this paper, multiple linear regression analysis method is proposed for the determination of Pb²⁺ and Cd²⁺ ion based on the two ion selective electrodes. .Meanwhile, the regression equations of Pb²⁺ ion and Cd²⁺ ion are established separately. The regression coefficient was R²=0.9999 and the experimental data were fitted well. This measure method is simply and the experimental results are satisfying.