Determination of vanadium in water samples from Brazilian mineral spring (Ibirá Spa) using ICP-MS

- Vanadium was accurately determined in water samples from Ibirá Spa − SP − Brazil.
- The vanadium determined in bottled drinking water were close to the values provided.
- ICP-MS using KED strategy was effective to overcome spectral interferences.
- The use of KED did not damage the sensitivity of the method.

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 5.0 mL min−1. The limits of detection (LOD) were 0.0097 and 0.0094 μg L−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 ± 8.7 μg L−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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