期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1005, 期 1-2, 页码 207-213出版社
ELSEVIER
DOI: 10.1016/S0021-9673(03)00843-4
关键词
low-flow nebulizers; inductively coupled plasma mass spectrometry; speciation; nebulizers; interfaces, LC-ICP-MS; arsenic
The performance of conventional and low-flow nebulizer systems with liquid chromatography in differentiating four arsenic species in urine was evaluated. Two low-flow (DIN and MCN) chamber assemblies and a conventional (CFN) nebulizer-spray chamber assembly were compared in the hyphenation of anion-exchange microbore liquid chromatography with inductively coupled plasma mass spectrometry. Under optimal analytical conditions, the detection limits of the four arsenic species were 0.2-0.6 ng ml(-1) for all the nebulizer systems tested. The chromatographic resolution was best in the case of DIN due to its minimal off-column dead volume and superior transport efficiency. Four arsenic species were determined in the certified reference materials NIST SRM 2670E and 2670N. (C) 2003 Elsevier B.V. All rights reserved.
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