期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 118, 期 -, 页码 112-118出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2016.02.014
关键词
Mineral samples; Polyatomic interferences; Inductively coupled plasma mass spectrometry; Reaction cell; Silica
类别
资金
- Fond de Recherche Quebecois - Nature et Technologies (FRQNT) [MI-181216]
- Natural Sciences and Engineering Research Council of Canada (NSERC) [STPGP-463032]
This article reports on the development of a new method for the accurate and precise determination of the amount of scandium, Sc, in silicon-containing minerals, based on the use of tandem quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS). The tandem quadrupole instrument enables new mass filtering configurations, which can reduce polyatomic interferences during the determination of Sc in mineral matrices. He and O-2 were used and compared as collision and reaction gases for the removal of interferences at m/z 45 and 61. Using helium gas was ineffective to overcome all of the spectral interferences observed at m/z 45 and particularly for Si-based interferences. However, conversion of Sc+ ions into ScO+ ions (after bombardment with O-2 in the octopole reaction system coupled with the use of the instrument in MS/MS mass-shift mode) provided interference-free conditions and sufficiently low limits of detection, down to 3 ng L-1, to accurately detect Sc. The accuracy of the proposed methodology was assessed by analyzing five different reference materials (BX-N, OKA-2, NIM-L SY-3 and GH). (C) 2016 Elsevier B.V. All rights reserved.
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