Chiral analyses of methamphetamine (MA) and its metabolites of urine samples from 250 d-MA abusers were done by capillary electrophoresis/mass spectrometry (CE/MS) with direct injection of urine. We examined the relationships between the concentrations of unchanged MA and metabolites including the conjugates and the intake situations of MA (e.g. date, route) based on statements of abusers.
