A sensitive voltammetric method has been developed for the determination ofrncadmium(ll) utilizing a carbon paste electrode modified with N-p-chlorophenylcinnamohydroxamicrnacid. The analyte was accumulated at the modified electrodernsurface (via complexation) under open circuit and precisely controlled convectiverncondition. It was then quantified electrochemically by differential pulse anodicrnstripping voltammetry in a different non-deaerated electrolyte solution followingrnmedium exchange. Detailed experiments were conducted to establish the optimalrncarbon paste composition, pH and concentration of accumulation and strippingrnsolutions, preconcentration time, bulk cadmium(li) concentration, and instrumentalrnparameters.Two good linearities were obtained between the voltammetric current andrncadmium concentration employing different preconcentration times. One is acquiredrnin the concentration range 2.00 x 10'7 - 3.20 x 10â€™6 MCd(ll) (r=0.999) and the otherrnfrom 4.00 x 10â€˜8 to 1.60 x 10'7 M Cd(ll) (r=0.999) with 1 min and 2 minrnpreconcentration time, respectively. The detection limit was found to be 9.80 x 10'9rnM(1.1 ppb) Cd(ll) with 2 min preconcentration time. For a series of six determinationsrnof Cd(ll) at 1 x 10â€˜6 M and 8 x 1CT8 M levels relative standard deviations of 2.6% andrn5.5%, respectively, were achieved. Electrochemical cleaning was used to regeneraternthe surface rapidly and reproducibility; and this allows the use of a single modifiedrnelectrode surface in multiple analytical determinations over several weeks. Manyrncommon metal ions had little or no effect on the determination of cadmium(ll). Thernmethod was verified by the determination of trace cadmium(ll) in municipal andrnmineral waters.