Y. Nagaosa et Y. Kimata, HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY WITH ELECTROCHEMICAL DETECTIONFOR THE DETERMINATION OF VANADIUM(V) IN RIVER WATER AND MUSSEL SAMPLES, Analytica chimica acta, 327(3), 1996, pp. 203-209
A highly sensitive method has been developed for the determination of
vanadium(V) by reversed-phase liquid chromatography with electrochemic
al detection at -0.60 V vs. Ag/AgCl. The metal complex with N-phenylbe
nzohydroxamic acid was separated on a C-18 (ODS) column; the mobile ph
ase was a 1:1 (v/v) mixture of acetonitrile-acetate buffer (0.02 mol l
(-1), pH 3.5) containing 0.05 mol l(-1) potassium nitrate. The elution
peak due to the vanadium(V) complex appeared on the chromatogram, and
the peak height was proportional to the concentration of the metal io
n in the range of 3.0-100.0 ng ml(-1). The detection limit for vanadiu
m(V) was 1.0 ng ml(-1). he method has been applied to the determinatio
n of vanadium in two river water samples and one mussel homogenate wit
h precise results.