A simple high performance liquid chromatographic method for the quantification of total cotinine, total 3'-hydroxycotinine and caffeine in the plasma of smokers.
Ghosheh OA, Browne D, Rogers T, de Leon J, Dwoskin LP, Crooks PA. A simple high performance liquid chromatographic method for the quantification of total cotinine, total 3'-hydroxycotinine and caffeine in the plasma of smokers. J Pharm Biomed Anal. 2000 Aug 15; 23(2-3):543-9.