Reactivity and analytical performance of oxygen as cell gas in inductively coupled plasma tandem mass spectrometry

The reactivity and analytical performance of O2 as cell gas in inductively coupled plasma tandem mass spectrometry was investigated. Selected analytes in a wide mass range were divided in three groups according to their reactivity: G1 represents elements with high oxygen affinity (Ce, La, P, Sc, Ti,...

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Published in:Spectrochimica acta. Part B: Atomic spectroscopy 2016-12, Vol.126, p.31-36
Main Authors: Virgilio, Alex, Amais, Renata S., Amaral, Clarice D.B., Fialho, Lucimar L., Schiavo, Daniela, Nóbrega, Joaquim A.
Format: Article
Language:English
Subjects:
Flow rate
Inductively coupled plasma
Mass spectrometry
Mathematical analysis
Molybdenum
Oxides
Oxygen
Oxygen reaction
Sensitivity analysis
Tandem mass spectrometry
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Summary:The reactivity and analytical performance of O2 as cell gas in inductively coupled plasma tandem mass spectrometry was investigated. Selected analytes in a wide mass range were divided in three groups according to their reactivity: G1 represents elements with high oxygen affinity (Ce, La, P, Sc, Ti, and Y), G2 contains elements that may partially react with oxygen (As, Ba, Mo, Si, Sr, and V), and G3 comprises elements expected to be less reactive towards oxygen (Al, Bi, Cu, Mg, Pb, and Pd). On-mass and mass-shift modes were evaluated by monitoring atomic and metal oxide ions, respectively. Analytical signal profiles, oxide percentages, sensitivities and limits of detection for oxygen flow rates varying from 0.1 to 1.0mLmin−1 were also studied. Group 1 elements plus As and V presented better sensitivities and LODs when measuring oxides, which were the major species for all flow rates evaluated. Molybdenum and Si oxides presented intermediate behavior and MoO fraction was up to 47% and limit of detection was the same as that obtained in on-mass mode. For others G2 and G3 elements, on-mass mode presented higher sensitivity and better LODs, with estimated oxide contents lower than 10%. In most cases, increasing oxygen flow rates led to lower sensitivities and worse LODs. [Display omitted] •Oxygen reactivity for 18 elements in ICP-MS/MS was reported.•Different oxygen gas flow rates were evaluated.•On mass and mass-shift modes were thoroughly studied.•Analytical performance was checked for different conditions.
ISSN:0584-8547
1873-3565
DOI:10.1016/j.sab.2016.10.013