Determination of 210 Pb in mineral waters using Eichrom Resin Alžbeta Ďurecová, Dagmar Bursová, František Ďurec, Daniela Borošová State Institute of Public Health Department of Radiation Protection Banská Bystrica Slovak Republic

Objectives  Contribution to the determination of 210 Pb using Eichrom Resin in mineral waters  Determination of the chemical recovery by AAS

Preparation of water samples  1 litre of water acidified by HNO 3 to pH < 2  add 20 mg of Fe carrier and 7 mg of Pb carrier  add NH 4 OH to precipitate Fe as Fe(OH) 3

Separation scheme Centrifuge, Sample of water acidified to pH < 2 LSC plastic vial 6M HCl Pb Resin LSC counting discard Iron hydroxide precipitation 2M HCl 6M HNO 3 Evaporation Chemical recovery AAS precipitate supernatant

Total dissolved solids in water samples

210 Pb in water samples Results

Determination of chemical recovery by AAS Results

Summary  Pb. Resin is suitable for the separation of 210 Pb in natural mineral waters  The method is more efficient and cost-effective than traditional procedures  AAS determination of chemical yields leads to greater accuracy