Advances in New and Renewable Energy >
Determination of Flavonoids from Four Energy Grasses
Received date: 2016-04-26
Revised date: 2016-06-12
Online published: 2016-06-27
The total flavonoid contents in four common energy grasses (hybrid Pennisetum, switchgrass, giant reed, elephant grass) including whole strain, stems and leaves were quantified. The flavonoids were detected by LC-MS. For the whole strains, switchgrass has a flavonoids content of 6.84 mg quercetin equivalents/g dry weight, which is 59.8%, 20.1% and 11.2% higher than giant reed, hybrid Pennisetum and elephant grass. The content in leaves is 2.3 ~ 3.0 times to stems, the contents in hybrid Pennisetum leaves is 10.55 mg quercetin equivalents/g dry weight, which is the highest among all these samples. 14 flavonoid glycosides and 2 flavonols were identified in the extracts of four grasses. Quercetin, isorhamnetin and quercitrin are identified positively with standards. This research may provide a theoretical support for the value added phytochemicals extract from energy grass.
Key words： energy grass; LC-MS; flavonoid glycosides; flavonol; total flavonoid content
YANG Li-gui , SUN Yong-ming , KONG Xiao-ying , LI Lian-hua , LIU Shu-na , DONG Peng-yu , YUAN Zhen-hong . Determination of Flavonoids from Four Energy Grasses[J]. Advances in New and Renewable Energy, 2016 , 4(3) : 225 -231 . DOI: 10.3969/j.issn.2095-560X.2016.03.010
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