title: Multi-element detection of organometals by supercritical fluid chromatography with inductively coupled plasma mass spectrometric detection.
abstract: Organometal compounds of arsenic, antimony, and mercury are speciated using supercritical fluid chromatography with inductively coupled plasma mass spectrometric (ICP-MS) detection. The multi-element capability of ICP-MS for transient signals is examined by detecting five compounds containing all three elements in a single chromatographic injection. The results obtained are compared with those obtained from flame-ionization detection (FID). Trimethyl arsine is not distinguished from the solvent peak when FID is used because it coelutes with the solvent, whereas trimethyl arsine is detected when ICP-MS is used because of its element-selective nature. The detection limits obtained by ICP-MS are 2-3 orders of magnitude lower than those obtained by FID. Determination of isotope abundance is also demonstrated for triphenyl antimony and diphenyl mercury compounds.
authors.affiliation: University of Cincinnati, Department of Chemistry, Ohio 45221-0172, USA.
authors.forename: U T
authors.initials: UT
authors.lastname: Kumar
authors.forename: N P
authors.initials: NP
authors.lastname: Vela
authors.forename: J A
authors.initials: JA
authors.lastname: Caruso
mesh_terms: D000965:Antimony / Q000032:analysis*; D001151:Arsenic / Q000032:analysis*; D002845:Chromatography / Q000379:methods* / Q000706:statistics & numerical data; D013058:Mass Spectrometry / Q000379:methods*; D008628:Mercury / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012997:Solvents
chemical_list: D012997:Solvents; D000965:Antimony; D008628:Mercury; D001151:Arsenic