Kw. Warnken et al., Trace metal analysis of natural waters by ICP-MS with on-line preconcentration and ultrasonic nebulization, J ANAL ATOM, 14(2), 1999, pp. 247-252
Concentrations of Mn, Ni, Cu, Zn and Pb in natural waters were measured by
inductively coupled plasma mass spectrometry (ICP-RIS) with on-line preconc
entration using Toyopearl TSK-immobilized 8-hydroxyquinoline resin columns
and ultrasonic nebulization. Trace metal concentrations, quantified after a
nalyzing calibration standards, were measured in 3 mL samples in under 15 m
in with better than 5% precision. Method detection limits were 0.26, 0.86,
1.5, 10 and 0.44 ng L-1 for Mn, Ni, Cu, Zn and Pb, respectively. The accura
cy of the method was demonstrated by results from runs of certified referen
ce materials SLRS-3 and CASS-3, which have very different ionic strengths.
This on-line system was successfully applied to measure water column trace
metal concentrations in Galveston Bay, Texas, and the results compared favo
rably with those obtained using state-of-the-art off-line preconcentration
techniques.