Doi:10.1016/j.jpba.2005.02.033
Journal of Pharmaceutical and Biomedical Analysis 38 (2005) 781–784Stable isotopic composition of the active pharmaceuticalA.M. Wokovich , J.A. Spencer , B.J. Westenberger , L.F. Buhse , J.P. Jasper a Food and Drug Administration, Center for Drug Evaluation and Research, Division of Pharmaceutical Analysis, St. Louis, MO 63101, USA b Molecular Isotope Technologies, LLC, 8 Old Oak Lane, Nia