Simultaneous determination of several trace metals by asv after preconcentration by adsorption as padap complexes on C(18)-bonded glass beads.
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.
Taguchi
S
S
Department of Chemistry, Faculty of Science, Toyama University, Toyama, Japan 930.
Yai
T
T
Shimada
Y
Y
Goto
K
K
Hara
M
M