Electrochemical Detection of Pb(II) Using A Pencil Electrode with Square Wave Anodic Stripping Voltammetry Method

Muhammad Zamhari (Program Studi Pendidikan Kimia, Fakultas Ilmu Tarbiyah dan Keguruan, Universitas Islam Negeri Sunan Kalijaga)
Muhamad Aditya Hidayah (Program Studi Pendidikan Kimia, Fakultas Ilmu Tarbiyah dan Keguruan, Universitas Islam Negeri Sunan Kalijaga)
Gerda Pintoko Tunjungsari (Program Studi Pendidikan Kimia, Fakultas Ilmu Tarbiyah dan Keguruan, Universitas Islam Negeri Sunan Kalijaga)
Endaruji Sedyadi (Kimia, Fakultas Sains dan Teknologi, Universitas Islam Negeri Sunan Kalijaga)

EduChemia: Jurnal Kimia dan Pendidikan
Vol 7, No 2 (2022)

This work describes a simple and inexpensive Pb(II) determination by a pencil electrode using the square wave anodic stripping voltammetry (SWASV) method. This research was applied using a batch cell system on 10 mL of 0.1 M acetate buffer pH 4.5. The precision was performed with repeatability and reproducibility in Pb(II) concentrations of 0.2, 0.4, 0.6, and0.8µg mL-1. Two linear ranges were obtained in the concentration of 0.1–1.0 and 2.0–8.0 µg mL-1. This method offers a detection limit of 0.07 µg mL-1 and a quantification limit of 0.24 µg mL-1. The technique performed good repeatability (RSD= 7.28–9.53%) and good reproducibility (RSD=7.07–15.10%). The precisions are accepted according to the Association of Official Analytical Chemists (AOAC) standard (RSD repeatability <11% and RSD reproducibility <16% at a concentration of 1 µg mL-1). The method offered high operational stability up to 18 measurements (RSD=4.6%). The technique performs acceptable results with low random error in determining Pb(II).