Abstract
Several salts of N, N-substituted derivatives of dithiocarbamic acid were studied as potential reagents for flow-injection extraction-spectrophotometric determination of copper. A specific and sensitive method for the determination of copper was developed. Copper is extracted with a chloroform solution of lead diethyldithiocarbamate (DDTC) and the absorbance of the Cu-DDTC complex is measured at 436 nm. Effects of total flow rate, sample volume, mixing and extraction coils length are studied. The detection limit is 0.04ppm of Cu and calibration graph is linear up to 2ppm Cu. The method developed was applied to the determination of copper in samples of water and plant materials showing good precision and accuracy.
