Preparation, Characterization and Electrochemical Application of ZnS/ZnAl2S4 Nanocomposite for Voltammetric Determination of D-Penicillamine

A novel carbon paste electrode modified with ZnS/ZnAl2S4 nanocomposite and an ionic liquid (ZZ/IL/CPE) was fabricated and used for the electrochemical study of Dpenicillamiene (D-PA). This modified electrode offers a considerable improvement in voltammetric sensitivity toward D-PA, compared to the bare electrode. Square wave voltammetry (SWV) exhibits a linear dynamic range from 5.0×10−7 to 3.0×10−4 M and a detection limit of 1.0×10−7 M for D-PA. Finally, the proposed method was successfully applied to the determination of D-PA in real samples.