Abstract
A methodology was developed for the determination of vanadium in water samples from a hydromineral spa located in Ibirá, Sao Paulo State, Brazil and in bottled drinking water, employing inductively coupled plasma mass spectrometry (ICP-MS). Evaluation of matrix isobaric interferences focused on the 35Cl16O+ polyatomic species at m/z 51. The determinations were carried out in standard and kinetic energy discrimination (KED) modes. Optimization of the helium flow rate in the KED mode showed that the most effective interference correction was achieved at a flow rate of 5.0mLmin−1. The limits of detection (LOD) were 0.0097 and 0.0094μgL−1 for the standard and KED modes, respectively. The concentrations of vanadium quantified in the samples studied ranged from 65.2±0.36 to 831±8.7μgL−1. The accuracy of the method was confirmed by analysis of a certified reference material for water (NIST 1640A), achieving a recovery of 101%.
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