The influence of the selection of receiving slits and the use of standard samples with random orientation on the result of quantitative texture analysis was tested and discussed. The result proves that it will improve...The influence of the selection of receiving slits and the use of standard samples with random orientation on the result of quantitative texture analysis was tested and discussed. The result proves that it will improve the precision of the analysis to use proper slits and a randomly oriented standard sample. A simple method was given to interpolate the correction curves of random intensities.展开更多
A reliable high performance liquid chromatography method was developed for the quality evaluation of Polygonum aviculare L. Eight marker flavonoids were identified and simultaneously quantified, which included myricit...A reliable high performance liquid chromatography method was developed for the quality evaluation of Polygonum aviculare L. Eight marker flavonoids were identified and simultaneously quantified, which included myricitrin, hyperoside, galuteolin, avicularin, quercitrin, quercetin, luteolin, and kaempferol. The analysis was performed on an Inertsil ODS-4 column（4.6 mm×150 mm, 5 μm） with gradient elution. The mobile phases were 0.5% aqueous phosphoric acid and acetonitrile. The detection wavelength was 360 nm. The eight marker flavonoids were separated well with good linearity（r20.9991）, precision, stability and repeatability. The recovery rate was 95.58%–102.65%. Cluster analysis was employed to analyze 28 batches of samples. The result indicated that this method provides an efficient way to perform quality control as well as a scientific rationale for the Geo-authentication of Polygonum aviculare L.展开更多
文摘The influence of the selection of receiving slits and the use of standard samples with random orientation on the result of quantitative texture analysis was tested and discussed. The result proves that it will improve the precision of the analysis to use proper slits and a randomly oriented standard sample. A simple method was given to interpolate the correction curves of random intensities.
基金Study of Nature of Geo-authentic Crude Drug("9 73"State Key Project,Grant No.2006CB504700)
文摘A reliable high performance liquid chromatography method was developed for the quality evaluation of Polygonum aviculare L. Eight marker flavonoids were identified and simultaneously quantified, which included myricitrin, hyperoside, galuteolin, avicularin, quercitrin, quercetin, luteolin, and kaempferol. The analysis was performed on an Inertsil ODS-4 column（4.6 mm×150 mm, 5 μm） with gradient elution. The mobile phases were 0.5% aqueous phosphoric acid and acetonitrile. The detection wavelength was 360 nm. The eight marker flavonoids were separated well with good linearity（r20.9991）, precision, stability and repeatability. The recovery rate was 95.58%–102.65%. Cluster analysis was employed to analyze 28 batches of samples. The result indicated that this method provides an efficient way to perform quality control as well as a scientific rationale for the Geo-authentication of Polygonum aviculare L.
