Lutein and lutein esters in marigold flowers was quantitatively determined by high performance chromatography (HPLC) with ODS-C 18 column.A mixture of CH3CNCD*2CH3OHCD*2CH3COOCH2CH3 with volume ratio of 55∶1∶44 wa...Lutein and lutein esters in marigold flowers was quantitatively determined by high performance chromatography (HPLC) with ODS-C 18 column.A mixture of CH3CNCD*2CH3OHCD*2CH3COOCH2CH3 with volume ratio of 55∶1∶44 was used as mobile phase at a flow rate of 1.0 mL/min and detection was carried out at 460nm. The column temperature was about 20℃. The contents of lutein and lutein esters were determined by analytical curve of lutein since lutein and lutein esters have the same spectral characteristics. Determination results of hexane extracts and saponified samples of lutein show that the saponification transforms the esters into free lutein. The increase of the content of dipalmitate and palmitate stearate reveals that the reaction includes transesterifications.展开更多
文摘Lutein and lutein esters in marigold flowers was quantitatively determined by high performance chromatography (HPLC) with ODS-C 18 column.A mixture of CH3CNCD*2CH3OHCD*2CH3COOCH2CH3 with volume ratio of 55∶1∶44 was used as mobile phase at a flow rate of 1.0 mL/min and detection was carried out at 460nm. The column temperature was about 20℃. The contents of lutein and lutein esters were determined by analytical curve of lutein since lutein and lutein esters have the same spectral characteristics. Determination results of hexane extracts and saponified samples of lutein show that the saponification transforms the esters into free lutein. The increase of the content of dipalmitate and palmitate stearate reveals that the reaction includes transesterifications.
文摘以万寿菊花粉为原料,探明超声波强化石油醚提取叶黄素的工艺条件。确定适合提取用原料的粒度后,采用正交试验研究料液比、超声波功率、超声作用时间对提取率的影响。结果显示,较理想的提取条件为:料液比1∶25[质量(g)体积(m l)比]、超声波功率500 W、超声波作用时间30 m in,此条件下叶黄素的萃取率可达97%以上。