Sari TK, Riga R, Zubir M. Pencil Lead Electrode Modified with Gold Thin Layer for Voltammetric Detection of Chromium (VI). EKSAKTA [Internet]. 2021Jun.27 [cited 2024Apr.25];22(2):145-53. Available from: https://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/265