title: Enantiomeric separation of ornithine in complex mixtures of amino acids by EKC with off-line derivatization with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate.
abstract: A new analytical methodology was developed by EKC enabling the fast enantiomeric separation of Ornithine in complex mixtures of amino acids. A previous derivatization step with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) was achieved to enable the sensitive UV detection of amino acids as well as to make possible their interaction with the CDs employed as chiral selectors. A dual CD system containing an anionic and a neutral CD in phosphate buffer at acid pH showed a high resolving power allowing the enantiomeric separation of 18 protein amino acids and Orn. The method was applied to the analysis of fermented foods to investigate the extent of the presence of Orn enantiomers.
authors.affiliation: Departamento de Química Analítica, Facultad de Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain.
authors.forename: Ana Belén
authors.initials: AB
authors.lastname: Martínez-Girón
authors.forename: Elena
authors.initials: E
authors.lastname: Domínguez-Vega
authors.forename: Carmen
authors.initials: C
authors.lastname: García-Ruiz
authors.forename: Antonio L
authors.initials: AL
authors.lastname: Crego
authors.forename: Maria Luisa
authors.initials: ML
authors.lastname: Marina
mesh_terms: D000634:Aminoquinolines / Q000737:chemistry*; D053801:Capillary Electrochromatography / Q000379:methods*; D002219:Carbamates / Q000737:chemistry*; D005285:Fermentation; D005504:Food Analysis / Q000379:methods*; D009952:Ornithine / Q000737:chemistry / Q000302:isolation & purification*; D015203:Reproducibility of Results; D013237:Stereoisomerism
chemical_list: C078178:6-aminoquinolyl-N-hydroxysuccinimidyl carbamate; D000634:Aminoquinolines; D002219:Carbamates; D009952:Ornithine