These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Isotopic analysis of uranium in tree bark by ICP mass spectrometry: a strategy for assessment of airborne contamination.
    Author: Ma R, Bellis D, McLeod CW.
    Journal: Anal Chem; 2000 Oct 15; 72(20):4878-81. PubMed ID: 11055703.
    Abstract:
    Isotopic analysis of uranium in tree bark by ICP mass spectrometry is proposed as a new measurement strategy for monitoring airborne contamination and for discrimination of nuclear and nonnuclear emission sources. A quadrupole-based ICP mass spectrometer equipped with a microconcentric nebulizer and membrane desolvator was used to provide high-sensitivity measurement. The limit of detection for uranium (238U) was 0.004 ng L(-1). Measurement precision (235U/238U) was between 0.2 and 0.5% RSD for isotopic SRMs (U005 and U015; concentration, 1 microg L(-1)) and ranged from 0.4 to 3.1% RSD for tree bark extracts (U concentration, 0.03-0.08 microg L(-1)). Bark samples collected from the Peak District National Park in Derbyshire (U.K.) exhibited a natural 235U/238U isotope ratio value (0.0072) whereas samples from Sellafield, West Cumbria (U.K.) showed depletion in 235U (235U/238U = 0.0053-0.0064).
    [Abstract] [Full Text] [Related] [New Search]