Precise determination of femtogram quantities of radium by thermal ionization mass spectrometry

Cohen, Anthony and O'Nions, R. Keith (1991). Precise determination of femtogram quantities of radium by thermal ionization mass spectrometry. Analytical Chemistry, 63(23), pp. 2705–2708.

URL:	http://pubs.acs.org/cgi-bin/abstract.cgi/ancham/19...
DOI (Digital Object Identifier) Link:	http://dx.doi.org/doi:10.1021/ac00023a008
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Abstract

Femtogram quantities of Ra-226 (approximately 3 x 10(6) atoms, or 4 x 10(-5) Bq) have been determined in environmental materials, including seawater, mineral samples, and silicate rocks, by thermal ionization mass spectrometry. Chemical separation techniques suitable for all these materials are described here. Overall, these techniques enable the abundance of Ra-226 to be determined in samples of both seawater and silicates which are some 10(3) times smaller than those required by conventional radioactive counting methods.

Item Type:	Journal Article
ISSN:	0003-2700
Academic Unit/Department:	Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre:	Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID:	11824
Depositing User:	Anthony Cohen
Date Deposited:	07 Oct 2008 07:10
Last Modified:	02 Dec 2010 20:12
URI:	http://oro.open.ac.uk/id/eprint/11824

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