Anodic stripping potentiometric determination of antimony on a combined electrode

Abstract

The anodic stripping potentiometric (ASP) determination of antimony on a combined working-auxiliary-reference electrode system is described. The method utilises 3 m HCl as supporting electrolyte and a combined glassy carbon mercury film electrode at an electrolysis potential of 2400 mV versus Ag-AgCl (1 m HCl) for the reliable determination of ultratrace concentrations of antimony. A detection limit of 0.3 mg l 21 and a linear concentration range of 0.3-150 mg/l 21 antimony were accomplished under these conditions with an electrolysis time of 10 min. The use of L-cysteine was effective for the reduction of Sb V to Sb III and its subsequent use for the ASP determination of the metalloid. The method was successfully applied to the determination of trace and ultratrace concentrations of antimony in water and orchard leaves samples.

ELECTROCHEMISTRY AND AUTHENTICATION OF ARCHAEOLOGICAL LEAD USING VOLTAMMETRY OF MICROPARTICLES: APPLICATION TO THE TOSSAL DE SANT MIQUEL IBERIAN PLATE

“…Stripping peaks corresponding to the oxidation of lead (−0.45 V) and antimony (−0.21 V) are recorded for lead antimonate, while for copper compounds the stripping appears at 0 V. For arsenic compounds, the oxidative dissolution process looks like two superimposed peaks at 0.18 and 0.08 V. Bismuth compounds provide a well‐defined stripping signal at +0.10 V under these conditions. Such values agree well with those reported in the recent literature for antimony (Adeloju et al . 1998), arsenic (Dai et al .…”

Determination of Antimony (III) in Real Samples by Anodic Stripping Voltammetry Using a Mercury Film Screen-Printed Electrode

“…Taking into account previous experiences described for the determination of Sb (III) [ 29 , 30 ] using mercury film glassy carbon electrodes, an accumulation potential of −0.90 V was chosen for the formation of the mercury film. In effect, it can be experimentally proved that for potentials more positive than −0.90 V, no deposition of the mercury film was observed and for potentials lower than −0.990 V poor results were obtained.…”

“…The use of 3.00 M HCl as the supporting electrolyte in the DPASV determination of Sb(III) gave rise to high and well-defined oxidation peaks [ 30 ].…”

Stripping Chronopotentiometry in Environmental Analysis

“…Concerning to the analysis of Sb, the two methods found in the literature prefer chemical oxidation with Hg(II) in a glassy carbon MFE [29,30]. Se is mostly determined by constant current cathodic SCP in HCl-CaCl 2 medium [31 -33].…”