SYMPOSIA PAPER Published: 01 January 1998
STP15723S

High Precisin and High Accuracy Isotopic Measurement of Uranium Using Lead and Thorium Calibration Solutions by Inductively Coupled Plasma-Multiple Collector-Mass Spectrometry

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A novel method for the high accuracy and high precision measurement of uranium isotopic composition by Inductively Coupled Plasma-Multiple Collector-Mass Spectrometry is discussed. Uranium isotopic samples are spiked with either thorium or lead for use as internal calibration reference materials. This method eliminates the necessity to periodically measure uranium standards to correct for changing mass bias when samples are measured over long time periods. This technique has generated among the highest levels of analytical precision on both the major and minor isotopes of uranium. Sample throughput has also been demonstrated to exceed Thermal Ionization Mass Spectrometry by a factor of four to five.

Author Information

Bowen, I
VG Elemental, Ion Path, Winsford, Cheshire, UK
Walder, AJ
VG Elemental, Ion Path, Winsford, Cheshire, UK
Hodgson, T
URENCO (Capenhurst) Ltd, Mass Spectrometry Lab., Capenhurst, Chester, UK
Parrish, RR
University of Leicester and NERC Isotope Geosciences Laboratory, British Geological Survey, Notts, UK
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Details
Developed by Committee: C26
Pages: 22–31
DOI: 10.1520/STP15723S
ISBN-EB: 978-0-8031-5390-5
ISBN-13: 978-0-8031-2034-1