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Microchip-based liquid–liquid extraction for gas-chromatography analysis of amphetamine-type stimulants in urine

Amphetamine-type StimulantsGas ChromatographyMicrochip-based Liquid–liquid ExtractionMedicineDrug PurityBioanalysisDrug TestAnalytical ChemistryLiquid ChromatographyClinical ChemistryChromatographic AnalysisPharmacologyGas-chromatography AnalysisChromatographyDrug Analysis