期刊
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
卷 24, 期 20, 页码 2993-2998出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/rcm.4737
关键词
-
资金
- National Natural Science Foundation of China [20775013]
Stable complexes are required during the ion chromatographic (IC) separation of Fe-polycarboxylic acid complexes. Electrospray ionization mass spectrometry (ESI-MS) was used to identify 1:1 stoichiometric complexes of Fe[HEDTA], Fe[EDTA](1-) and Fe[DTPA](2-), and the spectra showed that these Fe complexes were stable in solution. Furthermore, inductively coupled plasma mass spectrometry (ICP-MS) using an octopole reaction system (ORS) reduced polyatomic ion (40)Ar(16)O(+) interference in the detection of (56)Fe via the addition of either H(2) or He to the ORS, with He at a flow rate 3.5 mL min(-1) being the optimum collision gas. Finally, IC/ICP-MS was used for the separation and detection of Fe complexes with an eluent containing 30 mM (NH(4))(2)HPO(4) at pH 8.0, but only FeRIEDTAJ, Fe[EDTA](1-) and Fe[DTPA](2-) were observed within 10 min with reasonable resolution. Detection limits in the range of 10-13 mu g L(-1) were achieved using He as the collision gas. The proposed method was used for the determination of Fe species in soil solutions. Copyright (C) 2010 John Wiley & Sons, Ltd.
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