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- W2010149351 abstract "A simple, rapid, reverse-phase high performance liquid chromatographic method was developed for the quantitative analysis of pseudolaric acids in Cortex Pseudolaricis and its related medicinal products. With a C(18) analytical column (4.6mmx150mm i.d.), five pseudolaric acids, namely pseudolaric acids A-C, pseudolaric acid A-O-beta-d-glucopyranoside and pseudolaric acid B-O-beta-d-glucopyranoside, were well separated within 7min. Acetonitrile and 0.10% acetic acid were used as the mobile phase in a gradient program. The UV detection wavelength was set at 260nm. The detection limits and quantification limits ranged in 8.26-16.66ng/ml and 27.54-55.53ng/ml, respectively. The intra- and inter-day variations were less than 1% for all five compounds. The recovery of all spiked pseudolaric acids ranged from 99.1% to 101.9%. Compared to existing analytical methods, this new method not only used two more important chemical markers but also provided a fivefold reduction in analysis time. In addition, the extraction method of herb sample was also modified by an orthogonal array experiment on three variable parameters: extraction time, solvent volume, and extraction cycles. The optimized extraction method was much simpler and could be efficiently used to analyse large set of herbal materials and related medicinal products. Nineteen herb samples collected from different regions of China and five related products were examined with this new analytical method. The results showed that this method is effective in distinguishing adulterants and unqualified products." @default.
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- W2010149351 date "2007-10-15" @default.
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- W2010149351 title "Rapid analysis of pseudolaric acids in Cortex Pseudolaricis and related medicinal products by high performance liquid chromatography" @default.
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- W2010149351 doi "https://doi.org/10.1016/j.talanta.2007.04.047" @default.
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