Abstract
Phencyclidine and monohydroxy metabolites were measured in human urine using gas chromatography—mass fragmentography with methane chemical ionization. Samples were extracted either untreated or following acid hydrolysis, derivatized with heptafluorobutyric anhydride, separated on a 3% SE-30 column and analyzed by mass fragmentography. The assay was sensitive to ca. 0.01 μg/ml for phencyclidine and ca. 0.05 μg/ml for the metabolites. Urine samples from five human subjects enrolled in a methadone maintenance program who had ingested phencyclidine were analyzed. The phencyclidine concentration ranged from 0.3 to 23.7 μg/ml. The concentrations of metabolites ranged from 0 to 1.8 μg/ml. A new monohydroxy metabolite was detected in the samples, but its structure was not fully elucidated. The specificity of the assay was examined.
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