A reliable ultrasound-assisted extraction (UAE) method combined with HPLC-UV for quantification of eight active alkaloids in fruits of Macleaya cordata (Willd) R. Br. was developed. The optimization conditions of ...A reliable ultrasound-assisted extraction (UAE) method combined with HPLC-UV for quantification of eight active alkaloids in fruits of Macleaya cordata (Willd) R. Br. was developed. The optimization conditions of UAE were obtained by using Box-Behnken design of response surface methodology. Chromatography was carried out using a Kromasil C18 column by gradient elution with 0.1% phosphoric acid aqueous solution for HPLC-UV. All calibration curves showed good linear correlation coefficients (R^2〉0.999 6) and recoveries (from 97.3% to 104.9%) were acceptable. 1,1-diphenyl-2-picrylhydrazyl (DPPH) method was employed to test the antioxidant activity of the extract from the samples. The proposed method was successfully applied to quantifying eight components in nine samples of M.cordata, and significant variations of alkaloid contents and antioxidant aetivity of the samples from different habitats were demonstrated. It presents a powerful proof for the selection of the best sources to extract eight kinds of alkaloids.展开更多
[Objectives]To explore the stability of sanguinarine and chelerythrine in Macleaya cordata(Willd.)R.Br.[Methods]The solubility and stability of sanguinarine and chelerythrine in seven solvents were measured by HPLC.Be...[Objectives]To explore the stability of sanguinarine and chelerythrine in Macleaya cordata(Willd.)R.Br.[Methods]The solubility and stability of sanguinarine and chelerythrine in seven solvents were measured by HPLC.Besides,the effects of water quality,light source,oxidant,temperature,and pH on stability were investigated.[Results]The solubility and stability of sanguinarine and chelerythrine in methanol and ethanol are good;the stability of sanguinarine and chelerythrine in distilled water and rainwater is not affected by light and is very stable,but they are unstable in tap water whether they are protected from light or not;oxidants have a great influence on the stability of sanguinarine and chelerythrine;sanguinarine and chelerythrine are stable at room temperature lower than 54℃;sanguinarine is stable in pH 2.5-7.0,while chelerythrine is stable in pH 2.5-8.0.[Conclusions]The good stability of sanguinarine and chelerythrine under specific conditions shows that they have broad development prospects and value.展开更多
基金Project(20576142) supposed by the National Natural Science Foundation of China Project(2009DFA31270) supported by the International Cooperation Project of Ministry of Science and Technology of China
文摘A reliable ultrasound-assisted extraction (UAE) method combined with HPLC-UV for quantification of eight active alkaloids in fruits of Macleaya cordata (Willd) R. Br. was developed. The optimization conditions of UAE were obtained by using Box-Behnken design of response surface methodology. Chromatography was carried out using a Kromasil C18 column by gradient elution with 0.1% phosphoric acid aqueous solution for HPLC-UV. All calibration curves showed good linear correlation coefficients (R^2〉0.999 6) and recoveries (from 97.3% to 104.9%) were acceptable. 1,1-diphenyl-2-picrylhydrazyl (DPPH) method was employed to test the antioxidant activity of the extract from the samples. The proposed method was successfully applied to quantifying eight components in nine samples of M.cordata, and significant variations of alkaloid contents and antioxidant aetivity of the samples from different habitats were demonstrated. It presents a powerful proof for the selection of the best sources to extract eight kinds of alkaloids.
基金Supported by Post-doctoral Foundation Project of Heilongjiang Province(LBHZ16094)Special Research Fund Project for Scientific and Technological Innovation Talents in Harbin City(2017RAQXJ115)Doctoral Starting up Project of Harbin University of Commerce(2019DS114).
文摘[Objectives]To explore the stability of sanguinarine and chelerythrine in Macleaya cordata(Willd.)R.Br.[Methods]The solubility and stability of sanguinarine and chelerythrine in seven solvents were measured by HPLC.Besides,the effects of water quality,light source,oxidant,temperature,and pH on stability were investigated.[Results]The solubility and stability of sanguinarine and chelerythrine in methanol and ethanol are good;the stability of sanguinarine and chelerythrine in distilled water and rainwater is not affected by light and is very stable,but they are unstable in tap water whether they are protected from light or not;oxidants have a great influence on the stability of sanguinarine and chelerythrine;sanguinarine and chelerythrine are stable at room temperature lower than 54℃;sanguinarine is stable in pH 2.5-7.0,while chelerythrine is stable in pH 2.5-8.0.[Conclusions]The good stability of sanguinarine and chelerythrine under specific conditions shows that they have broad development prospects and value.