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Home > Technical Articles > ICPMS
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Home > Technical Articles > ICPMS
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DRC vs. Reaction/Collision Cells on ICPMSThe argon plasma created by an ICPMS can contain polyatomic ions are ions generated by argon itself, argon dimmer (Ar2+) and argon oxide (ArO+), produced when water is present. With a mass of 80, Ar2+ is an interference for the major isotope of selenium (Se). With a mass of 56, ArO+ is an interference for the major isotope of iron (Fe). In traditional |
ICPMS, these
interferences are the reasons that less abundant isotopes of Se and
Fe are used. Using isotopes with lower abundances results in lower sensitivities and thus higher detection limits. With traditional ICPMS, detection limits for both Fe and Se were approximately 2-20 mg/L due to the argon plasma background and these polyatomic interferences. With reaction or collision cells, detection limits can be reduced to <1 mg/L. |
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The PerkinElmer ELAN 6100 DRC features a Dynamic Reaction Cell (DRC) while our Agilent 7500ce systems have dual reaction/collision cells. Both are effective at minimizing polyatomic ions from the plasma. Reaction cells may have reaction products that interfere with certain elements. Therefore they are most useful for a limited target list, but may also reduce the interference better than a collision gas. A collision gas such as He does not produce unwanted reaction products and allows the analysis of the broadest range of elements with minimal interference. |
Additional ICPMS publications on the website:Metals Analysis by ICPMS, ICPMS vs.GFAA, ICPMS Metals Screens, Lead (Pb) by Isotope Dilution ICPMS, and "Environmental Analysis Using ICP-MS", Environmental Laboratory, August/September 1993, pg. 44-49. "ICP-MS for the Analysis of Metals on Membrane Filters", American Industrial Hygiene Association Journal, 48(2), pg. 977-979, (1987). |
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