Article ID Journal Published Year Pages File Type
1169150 Analytica Chimica Acta 2008 6 Pages PDF
Abstract

An in situ plated lead film electrode has been applied for adsorptive stripping voltammetric determination of trace concentrations of molybdenum in the presence of Alizarin S. The procedure is based on the preconcentration of the molybdenum–Alizarin S complex at an in situ plated lead film electrode held at −0.6 V (versus Ag/AgCl), followed by a negatively sweeping square wave voltammetric scan. The peak current is proportional to the concentration of molybdenum over the range 2 × 10−9 to 5 × 10−8 mol L−1, with a 3σ detection limit of 9 × 10−10 mol L−1 with an accumulation time of 60 s. The measurements were carried out from underaerated solutions. The proposed procedure was validated in the course of Mo(VI) determination in water certified reference materials.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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