Determination of mercury by open circuit adsorption stripping voltammetry on a platinum disk electrode

摘要: Abstract The open circuit accumulation of mercury by adsorption onto a platinum electrode, followed constant potential reduction and an anodic voltammetric scan in separate cell, has been used to develop new analytical method for the determination mercury. re-oxidation stripping response was as signal. An 8 min step 10 −2 M nitric acid, 20 s delay time at −0.2 mV linear between 1.5 V with 500 −1 sweep rate 0.05 perchloric acid gives rise limit detection 1.2 × −8 M. Concentrations 4 5 −7 can be determined. applied natural waters. No interferences from other metallic species were observed.