A small accelerator mass spectrometer with a gas chromatographic inlet/interface.
Comparing AMS to scintillation counting
Applications of accelerator mass spectrometry
Why is accelerator mass spectrometry not widely used?
Schematic of a GC-AMS system
Q. Why can such low levels of 14C be quantitated?
Q. But why does it take a complex, expensive system to quantitate the 14C?
Schematic of the NSI/MIT GC-AMS
Oxidation and ionization
Isolation of the 14 Da isobars
Conversion to atomic ions
Detection of 14C
Our original test mixture.
Online oxidation of organics to CO2
Conversion of CO2 to C-
New test mixture, old GC column.
Online conversion of CO2 from organic molecules into C-
Detection of a 14CO2 pulse.
Summary
Thanks
PPT Slide
Email: wishnok@mit.edu
Home Page: http://web.mit.edu/toxms/www/index.htm
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