The rotating disc electrode in flowing systems : Part 2. A Flow system for automated anodic stripping voltammetry of discrete samples

Abstract The construction and characterization of a flow-through system for automatic a.s.v. analysis of discrete samples, based on the Autoanalyzer principle, is discussed. The flowthrough cell is equipped with a rotated disc electrode (a thin mercury film deposited on a glassy carbon substrate) as detector. Carry-over effects in the system are examined and the procedure is adjusted to minimize their influence. The system allows the simultaneous determination of trace metals (lead, cadmium and copper) at the ppb level, at a rate of 10 samples per hour, with relatively inexpensive equipment.