Chip electrophoresis of active banana ingredients with label-free detection utilizing deep UV native fluorescence and mass spectrometry
Autor: | Detlev Belder, Philipp Schulze, Stefan Ohla, Stefanie Fritzsche |
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Rok vydání: | 2010 |
Předmět: |
Serotonin
Chromatography Molecular Structure Ultraviolet Rays Alkaloid Metabolite Dopamine Tryptophan Musa Mass spectrometry Isoquinolines Biochemistry Fluorescence Mass Spectrometry Analytical Chemistry Electrophoresis Microchip Electrophoresis chemistry.chemical_compound Spectrometry Fluorescence chemistry Tyrosine Isoquinoline Quantitative analysis (chemistry) |
Zdroj: | Analytical and bioanalytical chemistry. 399(5) |
ISSN: | 1618-2650 |
Popis: | In the present work, we report on a rapid and straightforward approach for the determination of biologically active compounds in bananas applying microchip electrophoresis (MCE). For this purpose, we applied label-free detection utilizing deep UV fluorescence detection with excitation at 266 nm. Using this approach, we could identify dopamine and serotonin, their precursors tryptophan and tyrosine and also the isoquinoline alkaloid salsolinol in less than 1 min. In bananas, after 10 days of ripening, we additionally found the compound levodopa which is a metabolite of the tyrosine pathway. Quantitative analysis of extracts by external calibration revealed concentrations of serotonin, tryptophan, and tyrosine from 2.7 to 7.6 μg/mL with relative standard deviations of less than 3.5%. The corresponding calibration plots showed good linearity with correlation coefficients higher than 0.985. For reliable peak assignment, the compounds were also analyzed by coupling chip electrophoresis with mass spectrometry. This paper demonstrates exemplarily the applicability of MCE with native fluorescence detection for rapid analysis of natural compounds in fruits and reveals the potential of chip-based separation systems for the analysis of complex mixtures. |
Databáze: | OpenAIRE |
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