Development and Validation of an HPTLC Method for Simultaneous Quantitation of Isoorientin, Isovitexin, Orientin, and Vitexin in Bamboo-Leaf Flavonoids
A simple HPTLC method has been developed for the simultaneous determination of isoorientin, isovitexin, orientin, and vitexin, both pure and in commercial samples of bamboo-leaf flavonoids. The flavone C-glycosides, including isoorientin, isovitexin, orientin, and vitexin, were extracted from bamboo-leaf flavonoids with methanol and chromatographed on silica gel 60 plates in an automatic developing chamber with tetrahydrofurantolueneformic acidwater (16 8 2 1, v/v/v/v) mobile phase. Quantitation was obtained with UV detection at 350 nm. Polynomial calibration plots were constructed in the concentration range 2001200 ng/zone for isoorientin, 100600 ng/zone for isovitexin, 160960 ng/zone for orientin, and 30360 ng/zone for vitexin with good correlation coefficients (r 0.9995). The method was validated for precision (interday and intraday), repeatability, and accuracy. Accuracy of the method was evaluated by a recovery study conducted at three different levels, and the average recovery was found to be 93.95 for isoorientin, 95.30 for isovitexin, 99.79 for orientin, and 100.46 for vitexin. The proposed HPTLC method for estimation of isoorientin, isovitexin, orientin, and vitexin was found to be simple, precise, specific, and accurate and can be used for manufacturing QC of bamboo-leaf flavonoids or for governmental regulatory purposes.
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Document Type: Research Article
Affiliations: International Centre for Bamboo and Rattan, No. 8 Futong Dongdajie, Wangjing, Chaoyang District, Beijing 100102, China.
Publication date: 01 September 2010
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- The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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