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Precise isotopic analysis of lead in picomole and subpicomole quantities

Tera, Fouad and Wasserburg, G. J. (1975) Precise isotopic analysis of lead in picomole and subpicomole quantities. Analytical Chemistry, 47 (13). pp. 2214-2220. ISSN 0003-2700. http://resolver.caltech.edu/CaltechAUTHORS:20130910-130902014

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Abstract

A microanalytical procedure for the separation of Pb and U and their determination by isotope dilution-mass spectrometry is described. It is shown that high precision isotopic analysis of as little as 8 X 10^(11) Pb atoms is readily achievable. The level of Pb contamination is reduced to as little as 4 X 10^(10) atoms and the blank fluctuation is controllable. In the special case where the chemical separation could be omitted, 4 X 10^(10) Pb atoms were isotopically analyzed with a blank correction of 6 X 10^9 Pb atoms. This procedure was applied to a 0.2-mg lunar sample containing 2.5 ppm Pb and 1 ppm U and the U-Pb isotopic measurements obtained are Fully compatible with measurements on large samples. In addition, Pb on the surface of individual lunar glass balls of 150-300 µm diameter was measured. Extension of this approach to other heavy metals may be possible.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ac60363a036 DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ac60363a036PublisherArticle
Additional Information:© 1975 American Chemical Society. Received for review May 12, 1975. Accepted August 7, 1975. This work was supported by grants from the National Science Foundation (MPS-7102670 A05) and a grant from the National Aeronautics and Space Administration (NGL-05-002-188). CIT Contribution No. 2602. Editorial diligence by A. J. Gancarz and skillful support by Lily Ray are acknowledged.
Funders:
Funding AgencyGrant Number
NSFMPS-7102670 A05
NASANGL-05-002-188
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Caltech Division of Geological and Planetary Sciences2602
Record Number:CaltechAUTHORS:20130910-130902014
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130910-130902014
Official Citation:Precise isotopic analysis of lead in picomole and subpicomole quantities Fouad Tera and G. J. Wasserburg Analytical Chemistry 1975 47 (13), 2214-2220
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41211
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:17 Sep 2013 23:08
Last Modified:17 Sep 2013 23:08

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