This work exploited a sequential injection lab-on-valve (LOV) system for the determination of cadmium
by anodic stripping voltammetry (ASV). A miniaturized electrochemical flow cell (EFC) was fabricated
in LOV, in which a nafion coated bismuth film electrode was used as working electrode. The cadmium
was electrodeposited on the electrode surface in bismuth solution, and measured with the subsequential
stripping scan. Under optimal conditions, the proposed system responded linearly to cadmium concentrations
in a range 2.0–100.0gL−1. The detection limit of this method was found to be 0.88gL−1. By
loading a sample volume of 800L, a sampling frequency of 22 determinations h−1 was achieved. The
repeatability expressed as relative standard derivation (R.S.D.) was 3.65% for 20gL−1 cadmium (n = 11).
The established method was applied to analysis of trace cadmium in environmental water samples and
the spiked recoveries were satisfactory.