期刊
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 17, 期 10, 页码 1240-1247出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b204786c
关键词
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Removal of argon-based polyatomics (ArAr and ArO) that interfere with the determination of the main isotopes of selenium and iron was studied using an ICP-MS equipped with a hexapole collision cell. Various gases, including helium, hydrogen, ammonia and N2O, were evaluated to improve detection limits. The behavior of the non-interfered elements was also evaluated using the optimized gas conditions in order to keep the multi-element capability of the ICP-MS. Low detection limits were obtained when a mixture of helium and hydrogen was employed, the values being 2 ng L-1 and 6 ng L-1 for selenium (Se-80) and iron (Fe-56), respectively. The selected conditions did not degrade the LODs of the non-interfered elements.
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