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首页> 外文期刊>African Journal of Biotechnology >Study on the chemical composition and extraction technology optimization of essential oil from Wedelia trilobata (L.) Hitchc.
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Study on the chemical composition and extraction technology optimization of essential oil from Wedelia trilobata (L.) Hitchc.

机译：三叶草挥发油的化学成分及提取工艺优化研究。

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The chemical composition of hydro-distilled oil from?the ground aerial?parts of?Wedelia trilobata?(L.)?Hitchc.?was analysed by gas chromatography/gas chromatography–mass spectrometry (GC/GC–MS).?18 compounds representing all the oils were identified. The main components were demonstrated to be?α-phellandrene?(28.84%), germacrene?D?(15.79%),?D-limonene?(14.22%),?1,5,5-trimethyl-6-methylene- cyclohexene?(10.11%) and caryophyllene (9.08%).?In addition, some pharmaceutical components such as?β-pinene,?D-limonene,?germacrene?D and phytol?were discovered.?Orthogonal methodology L9(34)?were applied to optimize?extraction technology?and?evaluate the extraction yield, and?the effects of soaking time, extraction time and?solid to liquid ratio?on?oil?extraction efficiency were studied.Experimental results showed that?extraction time?had significant effect on the yield ofoil,?the influence order of different factors:?extraction time?>?soaking time?> solid to liquid ratio.?The optimum operating parameters were determined as follows:?soaking time,?extraction time?of?3 h?and solid to liquid ratio of 1:10. Under the optimized conditions, the maximal yield of?oil?was enhanced to 0.1778%.?Antioxidant activity of the oil was also assessed by?the free radical scavenging, 2,2'-diphenyl-b-picrylhydrazyl (DPPH). The study offers theoretic basis for utilization of the medicinal herb?W.?trilobata.
机译：通过气相色谱/气相色谱-质谱法（GC / GC-MS）分析了来自“ Wedelia trilobata”（L。）“ Hitchc。”的地面空中部分的水馏油的化学成分。代表所有的油被确定。已证明主要成分为α-水芹烯（28.84％），germ啶（D）（15.79％），D-柠檬烯（14.22％），1,5,5-三甲基-6-亚甲基环己烯（10.11％）和石竹烯（9.08％）。此外，还发现了一些药物成分，如β-pine烯，βD-柠檬烯，germacreneneD和植醇。采用正交方法L9（34）。考察了浸提时间，浸提时间和固液比对油浸提率的影响。实验结果表明浸提时间具有显着性。对油的收率的影响，不同因素的影响顺序为：萃取时间>浸泡时间>固液比。最佳操作参数确定如下：浸泡时间，提取时间3 h和固液比为1:10。在优化的条件下，“油”的最大收率提高到了0.1778％。还通过自由基清除剂2,2'-二苯基-b-picylhydrazyl（DPPH）评估了油的抗氧化活性。该研究为利用药用三叶草提供了理论依据。

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