Pb and Sr isotope measurements by inductively coupled plasma–mass spectrometer: efficient time management for precision improvement

Monna, Fabrice; Loizeau, Jean-Luc; Thomas, Bertrand; Gueguen, Céline; Favarger, Pierre-Yves

doi:10.1016/s0584-8547(98)00164-5

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Title		Pb and Sr isotope measurements by inductively coupled plasma–mass spectrometer: efficient time management for precision improvement
Authors		Monna, Fabrice Loizeau, Jean-Luc Thomas, Bertrand Gueguen, Céline Favarger, Pierre-Yves
Published in		Spectrochimica Acta. B, Atomic Spectroscopy. 1998, vol. 53, p. 1317-1333
Abstract		One of the factors limiting the precision of inductively coupled plasma mass spectrometry is the counting statistics, which depend upon acquisition time and ion fluxes. In the present study, the precision of the isotopic measurements of Pb and Sr is examined. The time of measurement is optimally shared for each isotope, using a mathematical simulation, to provide the lowest theoretical analytical error. Different algorithms of mass bias correction are also taken into account and evaluated in term of improvement of overall precision. Several experiments allow a comparison of real conditions with theory. The present method significantly improves the precision, regardless of the instrument used. However, this benefit is more important for equipment which originally yields a precision close to that predicted by counting statistics. Additionally, the procedure is flexible enough to be easily adapted to other problems, such as isotopic dilution.
Keywords		Inductively coupled plasma mass spectrometry — Lead isotope ratios — Strontium isotope ratios — Time optimisation — Precision improvement
Identifiers		DOI: 10.1016/s0584-8547(98)00164-5
Full text		Article (Published version) (733 Kb) - Limited access to UNIGE Other version: http://www.sciencedirect.com/science/article/pii/S0584854798001645
Structures		Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau
Citation (ISO format)		MONNA, Fabrice et al. Pb and Sr isotope measurements by inductively coupled plasma–mass spectrometer: efficient time management for precision improvement. In: Spectrochimica Acta. B, Atomic Spectroscopy, 1998, vol. 53, p. 1317-1333. doi: 10.1016/s0584-8547(98)00164-5 https://archive-ouverte.unige.ch/unige:36140