APPLICATION OF A POLY(DITHIOCARBAMATE) RESIN WITH MACRORETICULAR SUPPORT TO THE DETERMINATION OF TRACE AMOUNTS OF CADMIUM AND LEAD IN NONSALINE WATERS

The chelating poly(dithiocarbamate) resin with macroreticular support is shown to be effective for the preconcentration of cadmium and lead from non-saline waters. The retained ions can be eluted efficiently in 5 ml of 8 mol dm-3 nitric acid from 1-20 cm columns of resin. Poly(dithiocarbamate) resin is used for preconcentration in the determination of cadmium and lead by flame atomic absorption spectrometry. The common ions present in non-saline waters do not interfere. The sensitivity was 0.10-mu-g l-1 of Cd and 0.73-mu-g l-1 of Pb. The detection limits were 0.03 and 0.34-mu-g l-1 for Cd and Pb, respectively. The cadmium and lead concentration ranges, determined in mineral and tap waters, were between 0.1 and 0.8-mu-g l-1 and between 0.7 and 16.9-mu-g l-1, respectively.