The design and construction of a pair of tubular electrodes in series for anodic stripping voltammetry with collection at thin mercury films are described. A typical cell consists of two glassy carbon tubular working electrodes separated by a thin Teflon spacer. Trace metal cations stripped from the upstream electrode are collected at the downstream electrode at constant potential. Exploratory experiments have shown the dependence of the stripping and collection peaks on flow rate, deposition time, scan rate, and concentration. The exploratory equipment used permitted the measurement of subnanomolar concentrations of lead.
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