Additional study of the direct methanol-LSC method for low-level 14C measurement

When methanol for 14C liquid scintillation measurement is prepared directly from carbonized samples through combustion and LiAlH 4 reduction, solvent-originating methanol is likely to form in small amounts. We have modified the combustion condition to use an N 2−O 2 mixture of minimized O 2 content,...

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Bibliographic Details
Published in:Applied radiation and isotopes 1993-12, Vol.44 (12), p.1491-1493
Main Authors: Shibata, S., Kawano, E., Nakabayashi, T., Yamada, O.
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Labelled compounds chemistry
Organic chemistry
Reactivity and mechanisms
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Summary:When methanol for 14C liquid scintillation measurement is prepared directly from carbonized samples through combustion and LiAlH 4 reduction, solvent-originating methanol is likely to form in small amounts. We have modified the combustion condition to use an N 2−O 2 mixture of minimized O 2 content, and have made negligible the formation of solvent-originating methanol. Measurements of 14C concentrations in rice grains, anthracite and NIST standard sample demonstrate the validity of our method as a convenient technique for low-level 14C measurement.
ISSN:0969-8043
1872-9800
DOI:10.1016/0969-8043(93)90105-J