internal comparator method

An internal comparator method is proposed which offers reliable instrumental neutron activation analysis (INAA) results for samples with an irregular geometry and/or measured at the closest position to the Ge detector. Because the selected internal comparator in the sample analyzed will receive exac...

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Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2004-05, Vol.379 (2), p.210-217
Main Authors: Lin, X, Henkelmann, R
Format: Article
Language:English
Subjects:
chemical analysis
detectors
equipment performance
methods
neutron activation analysis
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Description
Summary:An internal comparator method is proposed which offers reliable instrumental neutron activation analysis (INAA) results for samples with an irregular geometry and/or measured at the closest position to the Ge detector. Because the selected internal comparator in the sample analyzed will receive exactly the same thermal neutron flux as the other components, this method can be applied to the INAA of materials suffering from thermal neutron self-shielding. To apply the internal comparator method, the k₀-method must be installed and the analytes, including the internal comparator, should be homogeneously distributed in the test portion.
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-004-2557-6