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Dependence of detector dead time on analyte mass number in inductively coupled plasma mass spectrometry

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Abstract
ICP mass spectrometry is being increasingly used for isotopic analysis and for element determination by means of isotope dilution. For accurate isotope ratio determination, both the mass discrimination and the detector dead time have to be appropriately corrected for. For a Finnigan-MAT Element and a Perkin-Elmer SCIEX Elan 5000 ICP mass spectrometer, the constancy of the detector dead time across the mass range was systematically investigated. For the Element, which is equipped with a conversion dynode and a secondary electron multiplier with discrete dynodes, the dead time was observed to be independent of the analyte mass number. For the Elan 5000, however, which is equipped with a Channeltron-continuous dynode-electron multiplier, the detector dead time was observed to be strongly mass-dependent. The decreasing gain of Channeltron electron multipliers with increasing ion mass may be at the origin of the behaviour established. This observation has to be taken into account when highly accurate isotope ratio measurements are required and hence the detector dead time has to be properly determined and corrected for.
Keywords
PRECISE DETERMINATION, ICP-MS, ION EXTRACTION, OPTIMIZATION, SAMPLES, DISCRIMINATION, ACCURATE, ELEMENTS, SYSTEMS, LEAD ISOTOPE RATIOS, electron multiplier, detector dead time, isotope ratio, inductively coupled plasma mass spectrometry

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Citation

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Chicago
Vanhaecke, Frank, Günther De Wannemacker, Luc Moens, Richard Dams, Christopher Latkoczy, Thomas Prohaska, and Gerhard Stingeder. 1998. “Dependence of Detector Dead Time on Analyte Mass Number in Inductively Coupled Plasma Mass Spectrometry.” Journal of Analytical Atomic Spectrometry 13 (6): 567–571.
APA
Vanhaecke, Frank, De Wannemacker, G., Moens, L., Dams, R., Latkoczy, C., Prohaska, T., & Stingeder, G. (1998). Dependence of detector dead time on analyte mass number in inductively coupled plasma mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 13(6), 567–571.
Vancouver
1.
Vanhaecke F, De Wannemacker G, Moens L, Dams R, Latkoczy C, Prohaska T, et al. Dependence of detector dead time on analyte mass number in inductively coupled plasma mass spectrometry. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY. 1998;13(6):567–71.
MLA
Vanhaecke, Frank, Günther De Wannemacker, Luc Moens, et al. “Dependence of Detector Dead Time on Analyte Mass Number in Inductively Coupled Plasma Mass Spectrometry.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 13.6 (1998): 567–571. Print.
@article{178648,
  abstract     = {ICP mass spectrometry is being increasingly used for isotopic analysis and for element determination by means of isotope dilution. For accurate isotope ratio determination, both the mass discrimination and the detector dead time have to be appropriately corrected for. For a Finnigan-MAT Element and a Perkin-Elmer SCIEX Elan 5000 ICP mass spectrometer, the constancy of the detector dead time across the mass range was systematically investigated. For the Element, which is equipped with a conversion dynode and a secondary electron multiplier with discrete dynodes, the dead time was observed to be independent of the analyte mass number. For the Elan 5000, however, which is equipped with a Channeltron-continuous dynode-electron multiplier, the detector dead time was observed to be strongly mass-dependent. The decreasing gain of Channeltron electron multipliers with increasing ion mass may be at the origin of the behaviour established. This observation has to be taken into account when highly accurate isotope ratio measurements are required and hence the detector dead time has to be properly determined and corrected for.},
  author       = {Vanhaecke, Frank and De Wannemacker, G{\"u}nther and Moens, Luc and Dams, Richard and Latkoczy, Christopher and Prohaska, Thomas and Stingeder, Gerhard},
  issn         = {0267-9477},
  journal      = {JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY},
  keyword      = {PRECISE DETERMINATION,ICP-MS,ION EXTRACTION,OPTIMIZATION,SAMPLES,DISCRIMINATION,ACCURATE,ELEMENTS,SYSTEMS,LEAD ISOTOPE RATIOS,electron multiplier,detector dead time,isotope ratio,inductively coupled plasma mass spectrometry},
  language     = {eng},
  number       = {6},
  pages        = {567--571},
  title        = {Dependence of detector dead time on analyte mass number in inductively coupled plasma mass spectrometry},
  url          = {http://dx.doi.org/10.1039/a709001c},
  volume       = {13},
  year         = {1998},
}

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