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杜仲叶中总黄酮的醇提工艺 总被引:1,自引:0,他引:1
在杜仲叶中总黄酮的提取实验中, 单因素考察了乙醇浓度、提取温度、提取时间等因素的影响趋势,并以正交实验设计优选最佳提取条件,即以12倍量的50% 乙醇,在80 ℃条件下回流提取60 min,重复提取一次,总黄酮得率达3.08%,占固体提取物的31.9%,得率稳定、重现性较好. 相似文献
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原子吸收分光光度法测定杜仲茶中无机元素含量王彩兰a孙瑞霞b吕文英b王太霞ca(河南师范大学化学系新乡453002)b(河南师范大学分析测试中心新乡453002)c(河南师范大学生物系新乡453002)关键词原子吸收杜仲叶制茶无机元素中图分类号O657... 相似文献
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Shuqin Liu Xican Li Rongxin Cai Ban Chen Jingyuan Zeng Chunhou Li Xianxi Zhou Yueying Li 《Journal of separation science》2023,46(13):2300041
Eucommiae Folium (Duzhongye) is a traditional Chinese medicine with a long history of use in China. However, its quality-marker in Chinese Pharmacopoeia is poorly defined nowadays. The study, therefore, conducted an ultra-high-performance liquid chromatography coupled with hybrid quadrupole-orbitrap tandem mass spectrometry analysis to obtain accurate data. The obtained data were then compared with the authentic standards library using Xcalibur 4.1 software package and TraceFinder General Quan. Through the comparison, the study has putatively identified 26 bioactive compounds, which include 17 flavonoid derivatives (catechin, quercetin 3-gentiobioside, quercetin 3-O-β-D-glucose-7-O-β-D-gentiobioside, taxifolin, myricetin 3-O-galactoside, myricitrin, hyperoside, rutin, isoquercitrin, quercetin 3-O-β-xylopyranoside, quercitrin, isorhamnetin 3-O-β-D-glucoside, quercetin, kaempferol, S-eriodictyol, S-naringenin, and phloridzin), four caffeoylquinic acids (neochlorogenic acid, chlorogenic acid, isochlorogenic acid A, and isochlorogenic acid C), two alkaloids (vincamine and jervine), one lignan (pinoresinol), one xanthone (cowaxanthone B), and one steroid (cholesteryl acetate). Of these, flavonoid isoquercitrin is recommended as the new and additional pharmacopeia quality-marker candidate, which can not only overcome the unreliability of old quality-marker but also recognize the possible counterfeit. 相似文献
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