Automatic AMS Sample Combustion and CO2 Collection

In Groningen, all organic samples for accelerator mass spectrometry (AMS) are combusted in an automatic Elemental Analyzer, coupled to an Isotope Ratio Mass Spectrometer and Cryogenic Trapping System. The Gas Chromatographic (GC) column, part of the Elemental Analyzer system, appeared to be the main...

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Bibliographic Details
Published inRadiocarbon Vol. 43; no. 2A; pp. 293 - 298
Main Authors Aerts-Bijma, A T, van der Plicht, J, Meijer, H A J
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, US Cambridge University Press 2001
University of Arizona
Subjects
B. The Methods
Excavation and methods
I. Becoming Better
Laboratory methods
Methodology and general studies
Physical and chemical analysis
Prehistory and protohistory
Combustion
Method
Sampling
Physical analysis
Mass spectrometry
Chromatography
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Summary:In Groningen, all organic samples for accelerator mass spectrometry (AMS) are combusted in an automatic Elemental Analyzer, coupled to an Isotope Ratio Mass Spectrometer and Cryogenic Trapping System. The Gas Chromatographic (GC) column, part of the Elemental Analyzer system, appeared to be the main cause for memory effects. Therefore we modified the Elemental Analyzer, such that the trapped CO2 no longer passed the GC column. Our system modification reduced the memory effect significantly, as shown by lower radiocarbon concentration values for anthracite backgrounds, and a much smaller spread in these values. Our modified system can perform up to 40 combustions unattended in about 6 hr.
ISSN:0033-8222
1945-5755
DOI:10.1017/S0033822200038133