Recent developments in inductively coupled plasma source magnetic sector multiple collector mass spectrometry
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Geological Sciences
- FI Elemental Analysis, Cheshire (United Kingdom)
- FI Isotopic Analysis, Cheshire (United Kingdom)
This paper describes advances in isotopic measurements that have been made with an inductively coupled plasma source magnetic sector multiple collector mass spectrometer and presents results of new experiments aimed at further evaluating the instrument`s capability. It is shown using standard solutions that trace element ratios such as Rb/Sr can be measured precisely without isotope dilution by comparison with reference solutions of known composition. Similarly, using a new wide flight tube, Pb isotopic compositions and U/Pb ratios can be accurately measured simultaneously without isotope dilution. The effects of deliberately inducing changes in the running conditions (RF power) are shown to be significant for measuring trace element ratios but not for mass bias and interference corrected isotopic compositions. Finally, it is demonstrated that precise and accurate isotopic compositions of elements as refractory as W can be determined relatively easily by solution nebulization and even by direct laser ablation of complex silicates. Isobaric interferences in such experiments are negligible. These experiments serve to highlight the remarkable potential that this new field offers for hitherto difficult isotopic measurements in nuclear, earth, environmental and medical sciences. Isotopic measurements can be made that are reproducible at high precision through a range of running conditions, even in the presence of isobaric interferences. The ability to correct for mass discrimination accurately using a second element of similar mass, the very high sensitivity for elements that are otherwise difficult to ionize, the demonstrated capability for laser ablation work and the ability to measure through a wide mass range simultaneously give this instrument major advantages over other more traditional techniques of isotopic measurement.
- Research Organization:
- Michigan Univ., Ann Arbor, MI (United States). Dept. of Geological Sciences
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- FG02-94ER14412
- OSTI ID:
- 10194561
- Report Number(s):
- CONF-940556-Absts.; ON: DE95003002; CNN: Grant EAR 911238; Grant EAR 9205435; Grant EAR 9304159; Grant EAR 9405503; Grant EAR 9406248; TRN: 94:010467
- Resource Relation:
- Conference: Alfred O. Nier symposium on inorganic mass spectrometry,Durango, CO (United States),10-12 May 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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