PRECONCENTRATION OF HEAVY-METALS IN URINE USING CHELATING ION-EXCHANGE RESIN AND QUANTIFICATION BY ICP-AES

A method is proposed that uses a polyamine chelating ion exchange resi n for preconcentration of Cd, Cu, Pb, Mn, and Ni in urine and their de termination by inductively coupled plasma-atomic emission spectrometry (ICP-AES). After adjusting the samples to pH 7.0, the complexed metal s can be eluted from the resin column with 1 M HNO3. The uptake of Cd, Cu, Pb, and Mn was quantitative (83-103%). For the determination of N i, the method of standard additions was necessary. A tenfold concentra tion factor for the 100-mL sample and the detection limits in the rang e of 3.7-9.0 mg/L make this procedure applicable for toxicological dia gnosis.