RESOLUTION AND TRACE DETERMINATION OF SELECTED OXYANIONS IN BINARY AND TERNARY MIXTURES BY DIFFERENTIAL PULSE POLAROGRAPHY

Resolution and trace determination of selected oxyanions in binary and ternary mixtures were studied by differential pulse polarography (DPP) at the dropping mercury electrode. The applicability of DPP for the simultaneous determination of the investigated oxyanions (TeO4(2-), VO3-, IO3-, IO4- and BrO3-) in the binary and ternary mixtures was also examined with regard to the dependence of the DP current on various parameters such as pH, pulse amplitude, scan rate and drop time. Statistical analysis is included on the observed concentrations for each of the oxyanions in the mixture and compared with that obtained by the calibration curves. Limits of detection and quantitation have been calculated for the DPP determination of binary and ternary mixtures of the selected oxyanions.