Vanadium and molybdenum concentrations in particulate from Palermo (Italy): analytical methods using voltammetry

Abstract

The main purpose of this work was to develop a reliable method for the determination of vanadium (V) and molybdenum (Mo) in atmosphere particles or aerosols because they can not be readily measured using conventional techniques. For this research, 30 particulate samples were collected from five different stations located at Palermo, Italy. We used the catalytic adsorptive stripping voltammetry and differential pulsed voltammetry to measure V and Mo in atmospheric particulate, respectively. The represented method includes advantages of high sensitivity, high selectivity, simplicity, reproducibility, speed and low costs. The quantification limits for V and Mo are, respectively, 0.57 and 0.80 ng·m⁻³. The precision, expressed as relative standard deviation (RSD %), was about 2% for both metals. The mean recoveries of added V and Mo were about 99.5% and ranged from 97% to 101%. Vanadium concentrations in particulate samples collected in Palermo area ranged from 0.57 to 7.7 ng·m⁻³, while Mo concentrations were in the range 0.8–51 ng·m⁻³. In many cases the concentrations of two elements in the particulate samples fall below the detection limits. The mean concentrations for V and Mo in particulate samples, collected in Palermo area, were respectively 3.1 and 5.9 ng·m⁻³.

Graphical abstract

Keywords

vanadium / molybdenum / particulate / voltammetry / Palermo

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Acknowledgements

The authors are grateful to AMIA spa and dr.ssa Michela Cirrito for helping us in finding samples used in this paper.

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