1. The atomic absorption molybdenum and vanadium standards (1000 mg lâ1) (Merck) signals remained approximately constant as the ashing tem- were used.
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Direct and simultaneous determination of molybdenum and vanadium in sea-water using a multielement electrothermal atomic absorption spectrometer Pi-Guey Su and Shang-Da Huang*
Downloaded on 07 January 2011 Published on http://pubs.rsc.org | doi:10.1039/A800948A
Department of Chemistry, National T sing Hua University, Hsinchu, 30043, T aiwan
Direct and simultaneous determinations of Mo and V in seawater using a multi-element electrothermal atomic absorption spectrometer (Perkin-Elmer SIMAA 6000) are described. Three kinds of chemical modifier [Mg(NO ) , Pd(NO ) and 3 2 3 2 a mixture of both] were tested. A simple calibration curve method could be used to determine Mo in sea-water using Pd or a mixture of Pd and Mg as the chemical modifier. A standard additions method was used to determine V and to determine Mo and V simultaneously in sea-water. The detection limits were 0.35–0.60 mg l−1 for Mo. The detection limit for V in this work (0.32–0.51 mg l−1) is much lower than those reported in the literature (18–50 mg l−1), such that direct determination of V in unpolluted sea-water (
