期刊
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 21, 期 4, 页码 422-426出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b516734e
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A flow injection system coupled to an inductively coupled plasma optical emission spectrometer (ICP-OES) was used for the on-line preconcentration and subsequent determination of vanadium. Trace amounts of V were preconcentrated by sorption on a conical minicolumn packed with immobilised yeast cells in the absence of complexing reagent at pH 7.0. Vanadium was removed from the minicolumn with a 50% HCl solution. An enrichment factor of 45-fold for a sample volume of 10 ml was obtained. The detection limit (LoD) for the preconcentration method proposed was 0.06 mu g l(-1). The precision for 10 replicate determinations at the 5 mu g l(-1) V level was 3.4% relative standard deviation (RSD), calculated from the peak heights obtained. The calibration graph of the preconcentration method for V was linear with a correlation coefficient of 0.9997 at levels near the detection limits up to at least 100 mu g l(-1). The method was successfully applied to the determination of V in tap and river water samples.
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