title: Micellar electrokinetic biofluid analysis of biogenic amines using on-line sample concentration and UV laser-induced native fluorescence detection.
abstract: A simple and sensitive sweeping micellar electrokinetic chromatography method coupled with UV laser-induced native fluorescence detection has been developed for quantitative analysis of biogenic amines in biofluids. The background electrolyte comprised 30 mmol L(-1) phosphoric acid and 20 mmol L(-1) sodium dodecyl sulfate. The concentration limits of detection of analytes using sweeping-micellar electrokinetic chromatography (sweeping-MEKC) were in the range 7-100 nmol L(-1), which were 250-3600-fold improvement for dopamine, DOPA and epinephrine compared with conventional capillary zone electrophoresis. An improvement of approximately 20-fold was observed for all analytes compared with typical micellar electrokinetic chromatography conditions. Baseline separation was achieved for the all analytes within 12 min and migration-time and peak-area repeatability were better than RSD 0.35% and 5.68%, respectively. The developed method was applied to measure the biogenic amines in biofluids extracted from wheat phloem sap, human plasma and human urine.
authors.affiliation: Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham, UK.
authors.forename: Hua-Ming
authors.initials: HM
authors.lastname: Tseng
authors.forename: David A
authors.initials: DA
authors.lastname: Barrett
mesh_terms: D001679:Biogenic Amines / Q000032:analysis / Q000097:blood / Q000652:urine; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D019075:Electrophoresis, Capillary / Q000379:methods*; D005453:Fluorescence; D006801:Humans; D016014:Linear Models; D010936:Plant Extracts / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014908:Triticum / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D001679:Biogenic Amines; D010936:Plant Extracts