目的考察米泔水炮制前后射干药材中6种异黄酮类成分的含量变化。方法采用高效液相色谱(HPLC)法测定射干生品及米泔水炮制品中射干苷、野鸢尾苷、鸢尾黄素、鸢尾甲黄素A、鸢尾甲黄素B、野鸢尾黄素的含量,流动相为乙腈-0.1磷酸水(每100 m ...目的考察米泔水炮制前后射干药材中6种异黄酮类成分的含量变化。方法采用高效液相色谱(HPLC)法测定射干生品及米泔水炮制品中射干苷、野鸢尾苷、鸢尾黄素、鸢尾甲黄素A、鸢尾甲黄素B、野鸢尾黄素的含量,流动相为乙腈-0.1磷酸水(每100 m L含甲基-β-环糊精和2-羟丙基-β-环糊精各0.375 g),梯度洗脱。结果射干药材经米泔水炮制后,射干苷及野鸢尾苷等苷类成分含量降低,而鸢尾黄素、鸢尾甲黄素A、鸢尾甲黄素B、野鸢尾黄素等苷元含量有所增加。结论米泔水炮制后射干中6种异黄酮类成分的含量均发生了变化,可促使异黄酮苷类成分向异黄酮苷元类成分转化。展开更多
Microwave-assisted extraction （MAE） of isoflavones from Belamcanda chinensis was studied using ethanol as the solvent. The single factor experiment and the orthogonal method were used to optimize the MAE condition. ...Microwave-assisted extraction （MAE） of isoflavones from Belamcanda chinensis was studied using ethanol as the solvent. The single factor experiment and the orthogonal method were used to optimize the MAE condition. It was concluded that two doses of intermittent microwave power radiation, 300 W each for 4 rain, were needed for extraction. The mass ratio of solvent to material was 8：1 and the alcohol mass fraction was 80%. The extracted liquor was then concentrated under vacuum and degreased with petroleum ether. The yield of total isofiavones was about 8.8% and the contents of tectoridin and iridin were 67.6% and 16.3% respectively. Compared with direct-heating extraction （DHE）, MAE may shorten extracting duration, reduce solvent consumption, and improve yield and purity of isoflavones from Belamcanda chinensis.展开更多
文摘目的考察米泔水炮制前后射干药材中6种异黄酮类成分的含量变化。方法采用高效液相色谱(HPLC)法测定射干生品及米泔水炮制品中射干苷、野鸢尾苷、鸢尾黄素、鸢尾甲黄素A、鸢尾甲黄素B、野鸢尾黄素的含量,流动相为乙腈-0.1磷酸水(每100 m L含甲基-β-环糊精和2-羟丙基-β-环糊精各0.375 g),梯度洗脱。结果射干药材经米泔水炮制后,射干苷及野鸢尾苷等苷类成分含量降低,而鸢尾黄素、鸢尾甲黄素A、鸢尾甲黄素B、野鸢尾黄素等苷元含量有所增加。结论米泔水炮制后射干中6种异黄酮类成分的含量均发生了变化,可促使异黄酮苷类成分向异黄酮苷元类成分转化。
文摘Microwave-assisted extraction （MAE） of isoflavones from Belamcanda chinensis was studied using ethanol as the solvent. The single factor experiment and the orthogonal method were used to optimize the MAE condition. It was concluded that two doses of intermittent microwave power radiation, 300 W each for 4 rain, were needed for extraction. The mass ratio of solvent to material was 8：1 and the alcohol mass fraction was 80%. The extracted liquor was then concentrated under vacuum and degreased with petroleum ether. The yield of total isofiavones was about 8.8% and the contents of tectoridin and iridin were 67.6% and 16.3% respectively. Compared with direct-heating extraction （DHE）, MAE may shorten extracting duration, reduce solvent consumption, and improve yield and purity of isoflavones from Belamcanda chinensis.
