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Determining Ion Compositions Using An Accurate Mass, Triple Quadrupole Mass Spectrometer

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Abstract:For the past decade, we have used double focusing mass spectrometers to determine
compositions of ions observed in mass spectra produced from compounds introduced by GC
based on measured exact masses of the ions and their +1 and +2 isotopic profiles arising from atoms of heavier isotopes such as 13C, 15N, 170, 180, 33S, and 34S.ln addition, comparison of measured abundances of the +1 and +2 profiles relative to the monoisotopic ion profiles
discriminated among ion compositions that were possible based on monoisotopic ions' exact
masses and the error limits of their measurement. Measuring these three exact masses and two relative abundances increased 4-fold, the mass for which unique ion compositions can be determined.
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Citation:Grange, A. H., W. Winnik, and G. W. Sovocool. Determining Ion Compositions Using An Accurate Mass, Triple Quadrupole Mass Spectrometer. Presented at American Society for Mass Spectrometry, Nashville, TN, May 23-27, 2004.
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Environmental Chemistry Branch
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Product Type: Abstrct/Oral
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Presented: 05/23/2004
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Related Entries:
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Bullet Item Advances in Sampling, Separation, Detection and Identification That Address Unmet Needs of Oswer and the Regions
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