Implementation of Steepest Ascent and Box-Behnken Approaches for Detecting Dysprosium in Acetonitrile Solution via Differential Pulse Voltammetry

Wyantuti, Santhy; Pratomo, Uji; Agustine, Syiffa Mutiara; Hardianto, Ari; Fauzia, Retna Putri; Rochani, Siti; Bahti, Husein Hernandi

doi:10.22034/abec.2024.714689

Implementation of Steepest Ascent and Box-Behnken Approaches for Detecting Dysprosium in Acetonitrile Solution via Differential Pulse Voltammetry

Document Type : Original Article

Authors

Santhy Wyantuti ¹

Uji Pratomo ¹

Syiffa Mutiara Agustine ¹

Ari Hardianto ¹

Retna Putri Fauzia ¹

Siti Rochani ²

Husein Hernandi Bahti ¹

¹ Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Indonesia

² Research Center for Mining Technology, National Research and Innovation Agency, Indonesia

10.22034/abec.2024.714689

Abstract

Dysprosium (Dy) is considered an important Rare Earth Element (REE) material in modern technology. However, due to its analogous chemical properties to other REEs, differentiating it within mixtures proves to be a challenging endeavor. Voltammetry has emerged as an alternative method for Dy determination, offering heightened sensitivity and fast analysis time. The selection of acetonitrile as the solvent is based on its broad potential range and exceptional conductivity. Additionally, the pursuit of optimal conditions through experimental design plays a pivotal role in identifying specific targets within mixtures. The combination of these methods is assumed to provide a satisfactory detection result. In this study, the Steepest Ascent and Box-Behnken designs were employed to optimize the conditions for Dy determination. The parameters subject to optimization included deposition potential, deposition time, and amplitude modulation. The outcome of this optimization process revealed the optimal conditions for Dy measurement via differential pulse voltammetry which are a deposition potential of -1.5171 V, deposition time of 76.0898 s, and amplitude modulation of 0.0860 V. Under these optimum conditions, the determination of Dy yielded a recovery rate of 99.47%, an accuracy of 97.06%, and a precision of 95.19%. Furthermore, the detection limit and quantitation limit values were found to be 2.1223 mg/L and 7.0744 mg/L, respectively. Moreover, the qualitative voltammetry result provides an insight into distinguishing Dy from Eu in the mixture.

Keywords

Differential Pulse Voltammetry

Steepest Ascent

Box-Behnken

Dysprosium

Acetonitrile

Subjects