>Dear Karyne and others,

Although probably they can be found in the reviews or thesis as notified
already by others on the list on this subject, I still like to give two
other references which cover the subject and might be helpful:

Abramsen, F.T., Teffera, Y., Kusmierz, J. Steenwijk, R.C. and Pearson, P.G.
1996. Replacing 14C with stable isotope in drug metabolism studies. Drug
Metab. Disposition, 24: 697-701.

15N/14N and 13C/12C by IRMS. Frensic studies using the ConFlo II interface.
Finnigan MAT Application Flash Report No. 15. (undated) 4 p.

Best wishes to all,
Pier de Groot.