alexa Determination of gentisin, isogentisin, and amarogentin in Gentiana lutea L. by capillary electrophoresis.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Proteomics & Bioinformatics

Author(s): Citov I, Ganzera M, Stuppner H, Solich P

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Abstract A novel, fast, and simple capillary electrophoresis method has been developed for the analysis of gentisin, isogentisin, and amarogentin in roots of Gentiana lutea (yellow gentian), an herb traditionally used as gastric stimulant. Gentisin and isogentisin are xanthones showing potent inhibition of monoamine oxidase type A and B, amarogentin represents one of the bitter principles of Gentiana, responsible for its gastric-roborant effects. Optimal CE-separation conditions comprise a 100 mM sodium tetraborate buffer of pH 9.3, containing 10 mM beta-cyclodextrin as additive; optimum temperature and applied voltage were found to be 30 degrees C and 25 kV, respectively. Direct diode array detection at 260 nm (gentisin, isogentisin) and 242 nm (amarogentin) was performed, and the required analysis time was only 11 min. The developed method was validated for linearity, sensitivity, precision, and accuracy, and utilized to assay several commercially available G. lutea samples. Quantitative data obtained with the developed CE method are compared with HPLC results, and the advantages of each approach are discussed. This article was published in J Sep Sci and referenced in Journal of Proteomics & Bioinformatics

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