Description_x000D_ General description_x000D_ 2-Ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine perchlorate is a primary metabolite of methadone._x000D_ Application_x000D_ 2-Ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine perchlorate has been used as a standard in the quantitative determination of of methadone and metabolites in human meconium using liquid chromatography coupled with atmospheric pressure chemical ionization tandem mass spectrometry technique (LC–APCI–MS/MS)._x000D_ Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support._x000D_ Packaging_x000D_ 10 mg in poly bottle