The present study was designed to establish and optimize a new method for extracting chlorogenic acid and cynaroside from Lonicera japonica Thunb. through orthogonal experimental designl. A new ultrahigh pressure extr...The present study was designed to establish and optimize a new method for extracting chlorogenic acid and cynaroside from Lonicera japonica Thunb. through orthogonal experimental designl. A new ultrahigh pressure extraction （UPE） technology was applied to extract chlorogenic acid and cynaroside from L. japonica. The influential factors, including solvent type, ethanol concentration, extraction pressure, time, and temperature, and the solid/liquid ratio, have been studied to optimize the extraction process, The optimal conditions for the UPE were developed by quantitative analysis of the extraction products by HPLC-DAD in comparison with standard samples. In addition, the microstructures of the medicinal materials before and after extraction were studied by scanning electron microscopy （SEM）. Furthermore, the extraction efficiency of different extraction methods and the 2, 2-diphenyl-1-picrylhydrazyl （DPPH） radical scavenging activities of the extracts were investigated. The optimal conditions for extracting chlorogenic acid and cynaroside were as follows： ethanol concentration, 60%; extraction pressure, 400 MPa; extraction time, 2 rain; extraction temperature, 30 ℃; and the solid/liquid ratio, 1 ： 50. Under these conditions, the yields of chlorogenic acid and cynaroside were raised to 4.863% and 0.080%, respectively. Compared with other extraction methods, such as heat reflux extraction （HRE）, ultrasonic extraction （UE）, and Sohxlet extraction （SE）, the UPE method showed several advantages, including higher extraction yield, shorter extraction time, lower energy consumption, and higher purity of the extracts. This study could help better utilize L. japonica flower buds as a readily accessible source of natural antioxidants in food and pharmaceutical industries.展开更多
建立同时测定菊花中5种化学成分的一测多评的定量检测方法。以菊花中的木犀草苷为指标,采用Agilent ZORBAX Eclipse Plus C18色谱柱(250mm×4.6mm,5μm),乙腈-0.1%磷酸为流动相梯度洗脱,建立该成分与绿原酸、槲皮素、金合欢素、3,5...建立同时测定菊花中5种化学成分的一测多评的定量检测方法。以菊花中的木犀草苷为指标,采用Agilent ZORBAX Eclipse Plus C18色谱柱(250mm×4.6mm,5μm),乙腈-0.1%磷酸为流动相梯度洗脱,建立该成分与绿原酸、槲皮素、金合欢素、3,5-O-二咖啡酰基奎宁酸的相对校正因子,采用相对校正因子计算各成分的含量,实现一测多评法用于测定菊花中的化学成分的含量。同时将不同产地四大药菊5种化学成分的计算结果与外标法实测值进行比较验证,评价一测多评法在测定菊花中化学成分中应用的准确性和科学性。结果表明,一测多评法与外标实测值之间没有显著性差异。一测多评法用于菊花中化学成分的含量测定,准确可行。展开更多
基金supported by the PAPD(A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions)
文摘The present study was designed to establish and optimize a new method for extracting chlorogenic acid and cynaroside from Lonicera japonica Thunb. through orthogonal experimental designl. A new ultrahigh pressure extraction （UPE） technology was applied to extract chlorogenic acid and cynaroside from L. japonica. The influential factors, including solvent type, ethanol concentration, extraction pressure, time, and temperature, and the solid/liquid ratio, have been studied to optimize the extraction process, The optimal conditions for the UPE were developed by quantitative analysis of the extraction products by HPLC-DAD in comparison with standard samples. In addition, the microstructures of the medicinal materials before and after extraction were studied by scanning electron microscopy （SEM）. Furthermore, the extraction efficiency of different extraction methods and the 2, 2-diphenyl-1-picrylhydrazyl （DPPH） radical scavenging activities of the extracts were investigated. The optimal conditions for extracting chlorogenic acid and cynaroside were as follows： ethanol concentration, 60%; extraction pressure, 400 MPa; extraction time, 2 rain; extraction temperature, 30 ℃; and the solid/liquid ratio, 1 ： 50. Under these conditions, the yields of chlorogenic acid and cynaroside were raised to 4.863% and 0.080%, respectively. Compared with other extraction methods, such as heat reflux extraction （HRE）, ultrasonic extraction （UE）, and Sohxlet extraction （SE）, the UPE method showed several advantages, including higher extraction yield, shorter extraction time, lower energy consumption, and higher purity of the extracts. This study could help better utilize L. japonica flower buds as a readily accessible source of natural antioxidants in food and pharmaceutical industries.
文摘建立同时测定菊花中5种化学成分的一测多评的定量检测方法。以菊花中的木犀草苷为指标,采用Agilent ZORBAX Eclipse Plus C18色谱柱(250mm×4.6mm,5μm),乙腈-0.1%磷酸为流动相梯度洗脱,建立该成分与绿原酸、槲皮素、金合欢素、3,5-O-二咖啡酰基奎宁酸的相对校正因子,采用相对校正因子计算各成分的含量,实现一测多评法用于测定菊花中的化学成分的含量。同时将不同产地四大药菊5种化学成分的计算结果与外标法实测值进行比较验证,评价一测多评法在测定菊花中化学成分中应用的准确性和科学性。结果表明,一测多评法与外标实测值之间没有显著性差异。一测多评法用于菊花中化学成分的含量测定,准确可行。
