A rapid method for comparison analysis of illicit cocaine samples has been developed. The raw data are obtained by capillary gas chromatography using a nitrogenphosphorus detector. The area ratios of four alkaloids (tropacocaine, norcocaine, cis-cinnamoylcocaine, and trans-cinnamoylcocaine) to cocaine are calculated for each sample. These ratios are compiled in a computer database which allows easy comparison of samples and makes possible reliable conclusions regarding their commonality of origin.
Blood and plasma concentrations of butalbital (from Fiorinal) were determined in a small group of healthy volunteers after single oral doses of 100 mg of butalbital. Butalbital was quantitated by high-performance liquid chromatography with ultraviolet detection. Typical blood concentrations of butalbital peaked at 2.1 mg/L and declined to 1.5 mg/L at 24 h. The half-lives in blood were between 35 and 87.5 h with a mean of 61 h. Whole blood to plasma ratios were also determined.
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