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Effects of extraction solvent on the extraction yields of polyphenolic contents (total phenolic, flavonoid, anthocyanins and tannins contents) and antioxidant activitity of the Osmanthus fragrans' seed were examined for the first time. The extraction solvent included water and methanol, ethanol, acetone (30%, 70% and 100% v/v, respectively). The antioxidant activities of different solvent extractions...
A simple and rapid micellar electrokinetic capillary chromatography (MEKC) method has been developed for the simultaneous determination of six lignans, schizandrin, Gomisin A, schisantherin A, deoxyschizandrin, schizandrin B and schizandrin C, in fruits of S. chinensis and S. sphenanthera. The key factors for separation and determination were studied and the best analysis conditions were obtained,...
HPLC-fingerprint of Folium Fici Microcarpae of guangxi was studied in the paper. By reverse-phase high performance liquid chromatography, the herbal leaves of Ficus microcarpa taken from 10 sites in Guangxi province were analyzed. The analysis was conducted under the following conditions: an Ultimate ODS (5 μm, 4.6 mm × 250 mm) chromatographic column and acetonitrile-0.05% phosphoric acid solution...
The enantiomeric separations of three neonicotinoid insecticides (compounds 1, 2, and 3) were performed on a Chirobiotic V chiral column by high-performance liquid chromatography (HPLC) under a new-polar mobile phase mode, using methanol and ethanol with triethylamine as the basic additive as the mobile phase. Compound 1 obtained no separation under all the mobile phase, while compound 2 and 3 were...
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