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Development, validation and comparison of two microextraction techniques for the rapid and sensitive determination of pregabalin in urine and pharmaceutical formulations after ethyl chloroformate derivatization followed by gas chromatography–mass spectrometric analysis

BiochemistryGas ChromatographyMedicineChromatographic AnalysisMass SpectrometryPharmaceutical FormulationsAnalytical ChemistryLiquid ChromatographyClinical ChemistryEthyl Chloroformate DerivatizationSample Pre-treatmentPharmacologyMicroextraction TechniquesPreparative ApplicationChromatographyDrug Analysis