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High-performance liquid chromatographic determination of cocaine and benzoylecgonine by direct injection of human blood plasma sample into an alkyl-diol-silica (ADS) precolumn

Gas ChromatographyMedicineDrug PurityBioanalysisMass SpectrometryCocaineDrug TestAnalytical ChemistryLiquid ChromatographyClinical ChemistryDirect InjectionChromatographic AnalysisPharmacologyChromatographyDrug Analysis