期刊
TALANTA
卷 128, 期 -, 页码 337-344出版社
ELSEVIER
DOI: 10.1016/j.talanta.2014.04.077
关键词
Trace metal preconcentration; Nobias Chelate-PA1; Iminodiacetate resins; Matrix effect; GEOTRACES
资金
- National Science Counsel [NSC-102-2611-M-001-004-MY3]
- Academia Sinica
A fully automated high pressure pretreatment system with Nobias Chelate-PA1 resin (PA1) was developed for trace metal determination by ICP-MS in natural waters. By varying the concentrations of Mg and Ca to mimic the concentrations in the eluate obtained by PA1 or iminodiacetate type resins, the overall analytical performance of the system was assessed for the determination of Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Cd, Ag, Pb and REE. Comparing with the low mM level Mg and Ca (both ranging from 1 to 4 mM) eluted by iminodiacetate type resins, the eluate obtained by PA1 contains sub-mu M level Mg and Ca, which remarkably decrease matrix effect in ICP-MS analysis and significantly improve the analytical performance. With recovery better than 90% for most the trace metals examined, the accuracy was further verified through the analysis of five natural water reference materials with salinity spanning from 0 to 35 parts per thousand. We have successfully applied the pretreatment system to determine trace metals in the seawater samples collected in the Western Philippine Sea through Taiwan GEOTRACES cruise. (C) 2014 Elsevier B.V. All rights reserved.
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