Standard addition of tritium; speciation problems?

[Arvic Harms <Arvic.Harms@npl.co.uk>]

Dear all,



I have a question concerning liquid scintillation counting (LSC). Is the

efficiency for every chemical form of tritium under identical

experimental conditions the same (i.e., is it good idea to add a

standardised HTO source to a source containing an organic tritium form

(e.g., thymidine) in order to determine the activity of this organic

tritium form)? Anybody any ideas?



Thanks,



Arvic Harms





Dr Arvic Harms

Centre for Ionising Radiation Metrology

National Physical Laboratory

Queens Road

Teddington, Middlesex

TW11 0LW

United Kingdom



E-mail: arvic.harms@npl.co.uk

Tel ++44 20 8943 8512

Fax ++44 20 8614 0488



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