Research Article

3-Mercaptopropyltrimethoxysilane Modified Diatomite: Preparation and Application for Voltammetric Determination of Lead (II) and Cadmium (II)

Figure 9

Cyclic voltammetric curves recorded in 0.1 M ABS (pH 4.5) containing 100 ppb Cd(II) and 200 pbb Pb(II); scan rate 0.10 V s−1. (1): = 0.0152 mA, RSD = 2.75% (), and = −0.751 mV. (2): = 0.0627 mA, RSD = 2.83% (), and = −0.525 mV. (3): = 0.0102 mA, RSD = 3.50% (), and = −0.897 mV. (4): = 0.0038 mA, RSD = 2.96% (), and = −0.758 mV.