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  • Title: Analysis of benzoylecgonine in urine by high-performance liquid chromatography and gas chromatography-mass spectrometry.
    Author: Graffeo AP, Lin DC, Foltz RL.
    Journal: J Chromatogr; 1976 Nov 03; 126():717-22. PubMed ID: 977705.
    Abstract:
    Benzoylecgonine, a polar metabolite of cocaine, was extracted and purified from urine using a reversed-phase high-performance liquid chromatographic column. The portion of the eluent corresponding to elution of the drug was collected, derivatized, and quantified using gas chromatography-mass spectrometry with selected ion monitoring. Using this procedure, analysis of 1 ng/ml of benzoylecgonine in urine can be achieved.
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