Separation, identification and quantitative determination of free amino acids from plant extracts

amino acids analytical methods chemical composition chromatographie chromatographie en couche mince chromatographie en phase gazeuse chromatography composition chimique cromatografia cromatografia de capa fina drug plants espectrometria extraction extractos vegetales gas chromatography ginkgo biloba hedera helix hplc identification mass spectrometry measurement mesure plant extracts plantas medicinales plante medicinale spectrometrie spectrometry technique analytique thin layer chromatography uses usos utilisation