UTILIZATION OF STEEPEST ASCENT AND BOX-BEHNKEN DESIGN FOR DETERMINATION OF GADOLINIUM IN ACETONITRILE BY DIFFERENTIAL PULSE VOLTAMMETRY Santhy Wyantuti*, Uji Pratomo, Yeni W. Hartati, Amelia Shafira, Ari Hardianto, Husein Hernandi Bahti
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang Km.21, Jatinangor, Sumedang, Indonesia 45363
Abstract
Gadolinium (Gd) is an important material for advanced technology, hence, the development of a sensitive and efficient alternative for the Gd-detection method to reduce the dependency on complicated and expensive methods has been massively investigated. Furthermore, the combination of differential pulse voltammetry (DPV) and the experimental design to detect Gd provides a simple, effective, and efficient method. The optimum conditions used for this study showed an amplitude modulation of 0.0884V, potential deposition of 1.4382V, and deposition time was 60.3615s with the obtained recovery value, accuracy, and precision values being 98.37%, 95.91%, and 5.12% in relative standard deviation (RSD), respectively. Meanwhile, the detection and quantization limit values are 3.46 mg/L and 11.53 mg/L, respectively. Under optimum conditions, the presence of Gd in acetonitrile is determined in a mixture with Eu and Sm.
