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Updated: Jun 28, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
Published on: July 1, 2016
Simultaneous determination of several trace metals by asv after preconcentration by adsorption as padap complexes on
1Department of Chemistry, Faculty of Science, Toyama University, Toyama, Japan 930.
Abstract:
Traces of zinc, lead, copper and cadmium are determined simultaneously by anodic-stripping voltammetry (ASV) combined with a preconcentration technique utilizing C(18)-bonded glass beads. The metals are collected as their 2-(2-pyridylazo)-5-diethylaminophenol (PADAP) complexes on a column of the beads and the complexes are eluted with a small volume of ethanol-hydrochloric acidchloroform mixture. The eluate is evaporated to dryness in the presence of hydrogen peroxide and the residue dissolved in a small volume of acetic acid-sodium acetate buffer. The concentrations of the metals are measured by ASV, Quantitative recoveries are obtained for 0.01-ng ml levels of the metals. Many ions which interfere in the direct ASV procedure do not interfere in the present method.
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