Polyatomic Interferences Produced by Macroelements During Direct Multi-Elemental ICP-MS Hydrochemical Analysis |
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| Authors: | Vladimir N Epov Dominic Lariviere Ekaterina N Epova R Douglas Evans |
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| Institution: | Trent University, 1600 West Bank Drive, Peterborough, Ontario, Canada K9J 7B8;Vinogradov Institute of Geochemistry SB RAS, 1A Favorskogo, Irkutsk, Russia 664033 |
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| Abstract: | An experimental study of the interferences produced by macroelements (Na, K, Ca, Mg, Sr, S, Cl, Si, N and C) contained in natural waters during inductively coupled plasma-mass spectrometry (ICP-MS) is presented. The most significant interferences created by these elements were found to be SO, CO, CAr, SiH, SiO, NaH, NaAr, MgAr, CaO, KO and KAr, the magnitude of which was dependant on the concentration of each macroelement. To reduce these interferences, different approaches, for example, desolvating nebulisation, high resolution and dynamic reaction cell ICP-MS were applied and compared. All three approaches were found to be useful tools for significantly reducing various polyatomic interferences. Advantages and disadvantages for each approach are discussed. |
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| Keywords: | ICP-MS polyatomic interferences hydrochemistry high resolution desolvating nebuliser dynamic reaction cell |
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