Trace metal analysis by anodic stripping voltammetry: effect of sorption by natural and model organic compounds

摘要: Abstract A variety of model organic compounds representative the types substances occurring in natural waters were found to sorb onto hanging mercury drop electrodes anodic stripping voltammetric analysis trace metals. Sorption effects on ASV diagnostic parameters Ep and ip (peak current peak potential) pH dependent, with greater effect under acidic conditions some cases, significant at concentrations ppm range. Compounds tested included gelatin alkaline phosphatase as representatives soluble proteins. Triton X100 (a nonionic surfactant), a polysaccharides, including agar, alginic acid starch. Effects sorption depressed values, shifts more positive broader peaks. Implications these interpretation measurements terms speciation metals are discussed.