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This work presents a sensitive method for the determination of trace antimony based on the antimony-pyrogallol red (PGR) adsorption at a carbon paste electrode (CPE). The optimal conditions were to use an electrode containing 25% paraffin oil and 75% high purity graphite powder as working electrode, a 0.10 mol/L HCl solution containing 3.0×10 -5 mol/L PGR as accumulation medium and a 0.20 mol/L HCl solution as electrolyte with an accumulation time of 150 s and a reduction time of 60 s at -0.50doi:10.3390/s5040284 fatcat:vxba5box7jg5redzjkjcoe2ue4