Determination and validation method of molybdenum by adsorptive catalytic stripping voltammetry at lead film electrode
Nail Deniz, Lokman Liv and Nuri Nakiboğlu
J. Chem. Metrol. (2017), 11:2 ; 46-54
Department of Chemistry, Faculty of Arts and Sciences, Balıkesir University, Balıkesir, Türkiye
Electrochemistry Laboratory, TÜBİTAK UME (National Metrology Institute),P.Box: 41470 Gebze-Kocaeli, Türkiye
Abstract: A new, selective, sensitive and accurate method for determination of molybdenum by adsorptive catalytic stripping voltammetry was described. The method is based on catalytic reduction of adsorbed Mo(VI)-ARS complex onto the lead film electrode in the presence of chlorate used as oxidizing agent. The instrumental and solution parameters affecting the peak current were optimized. The calibration graph is linear between 2.65-20.00 µg/L Mo(VI) and limit of detection is estimated as 0.79 µg/L. The proposed method was applied to drinking water samples with satisfactorily recovery results and the uncertainty calculation of the method was performed.
Keywords: Molybdenum; Alizarin Red S; adsorptive catalytic stripping voltammetry; lead film electrode. © 2017 ACG Publications. All rights reserved.