Effect of organic solvents and molecular gases on polyatomic ion interferences in inductively coupled plasma mass spectrometry
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 5 (6) , 425-430
- https://doi.org/10.1039/ja9900500425
Abstract
The introduction of an organic solvent (ca. 10% propan-2-ol in water) or a molecular gas (2 or N2) into the central channel of the inductively coupled plasma has been shown to cause dramatic reductions in signals due to the polyatomic ions ArCl+, ArAr+ and ClCl+, with corresponding increases in the In+ : XY+ ratios using inductively coupled plasma mass spectrometry (ICP-MS). Some evidence for the competitive formation of species such as ArC+, ArN+ and ArO+, or CCl+, NCl+ and OCl+ in preference to the other interfering ions, was observed, depending on the method employed. The use of N2 at a flow-rate of 0.03 l min–1 doped into the central channel is recommended for the minimisation of ArCl+ interference in analysis by ICP-MS.Keywords
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