Multielement determination of trace elements in river water certified reference materials (JAC 0031, JAC 0032) by ICP-MS and ICP-AES with chelating resin preconcentration

Abstract

The multielement determination of trace elements in river water certified reference materials (JAC 0031 and JAC 0032), issued from the Japan Society for Analytical Chemistry, has been carried out by ICP-MS and ICP-AES. The chelating resin preconcentration method, using Chelex® 100, was employed for the enrichment of most trace elements, including rare-earth elements, while some of the elements were determined by direct sample introduction without any pretreatment. As a result, the concentrations of 37 elements in river-water certified reference materials were obtained in the present experiments. Their concentrations ranged from 1.23 × 10-3 g 1-1 for Ca to 1.2 × 10-12 g 1-1 for Tm. The analytical values for Ca, Na, Mg, K, Al, B, Fe, Cu, Zn, and Mn were almost in good agreement with the certified values, while that for Cr was not because of poor recovery in preconcentration. In addition, the REE (rare earth elements) distribution pattern of JAC 0031, normalized by the REE concentrations of continental shale, was compared with those of the Lake Biwa surface water and samples from 24 rivers in Japan.