Authors:
S. Mlinkó Central Research Institute for Chemistry of the Hungarian Academy of Sciences Pusztaszeri út 59-67 1025 Budapest (Hungary)

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I. Gács Central Research Institute for Chemistry of the Hungarian Academy of Sciences Pusztaszeri út 59-67 1025 Budapest (Hungary)

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K. Payer Central Research Institute for Chemistry of the Hungarian Academy of Sciences Pusztaszeri út 59-67 1025 Budapest (Hungary)

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J. Ottinger Central Research Institute for Chemistry of the Hungarian Academy of Sciences Pusztaszeri út 59-67 1025 Budapest (Hungary)

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E. Dobis Central Research Institute for Chemistry of the Hungarian Academy of Sciences Pusztaszeri út 59-67 1025 Budapest (Hungary)

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Abstract  

In this paper an automatic apparatus designed for the radioactivity measurement of14C-labelled organic compounds in the gaseous phase is described. The labelled organic compounds are combusted in a mixture of argon and oxygen. After combustion the oxygen content of the gas is eliminated by passing it through a copper packing. The water and heteroelements present are also removed and the radioactive carbon dioxide gas is swept by argon carrier gas into a piston-type counter tube. In the counter tube the piston forming a dividing wall moves forward in accordance with the rate of combustion and sweeping, and thus sucks the gases leaving the combustion tube into the effective tube volume. The anode wire is carried by a reel located in the piston and a spring device ensures its stretched state. At the end of the sweeping period methane is fed into the counter tube and the activity of the argon—methane—carbon dioxide mixture is measured in the limited proportional region. Manual and automatic operation is possible. The piston-type counter tube provides possibility for strandardization by means of extrapolation and for measurement of absolute activities.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)