Multielement determination of trace elements in coastal seawater by inductively coupled plasma mass spectrometry with aid of chelating resin preconcentration

The multielement determination of trace elements in coastal seawater by ind uctively coupled plasma mass spectrometry has been investigated with the ai d of chelating resin preconcentration. First, each coastal seawater sample (250 ml) was treated with a chelating resin (Chelex 100) at pH 6 for precon centration of trace elements. After filtration with a glass filter, the res in on the filter was carefully rinsed with 8 ml of 1 M ammonium acetate sol ution. Then, trace elements adsorbed on the resin were eluted with 6 mi of 2 M HNO3. As a result, the preconcentration factor of 41.7 fold was obtaine d, with the total concentration of matrix elements (Na, K, Mg, and Ca) less than 200 mg dm(-3). The recovery values were larger than 80% for 22 elemen ts among 29 elements determined. The present method was applied to the dete rmination of trace elements in the coastal seawater certified reference mat erial CASS-S, issued from National Research Council of Canada (NRC), as wel l as to the coastal seawater sample collected from Tokoname off-shore.