A thin-layer chromatography (TLC) method is described that can be used to detect benzolyecgonine (BE), a metabolite of cocaine, in human urine. It is a two-part procedure that can be integrated intoa rapid screening program for drug abuse. The first part of the method utilizes two TLC solvent systems to identify a variety of drugs, including BE. The second part is specific for the cocaine metabolite and can be used as a confirmation method. The procedure is sensitive to3-4 μ/ml of BE in urine. © 1977.
Mueller, M. A., Adams, S. M., Lewand, D. L., & Wang, R. I. H. (1977). Detection of benzoylecgonine in human urine. Journal of Chromatography A, 144(1), 101–107. https://doi.org/10.1016/0021-9673(77)80011-3