小黄姜精油提取工艺优化、成分分析及其生物活性研究
Study on the optimization of extraction process,composition analysis and biological activity of essential oil from Zingiber officinale Roscoe
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摘要: 以小黄姜为原料,采用同时蒸馏萃取法提取小黄姜精油,通过单因素试验和正交试验获得小黄姜精油的最佳提取工艺,利用GC-MS分析其化学成分,并对其抗氧化活性和抑菌活性进行研究.结果表明:小黄姜精油的最佳提取工艺条件为料液比1: 24,蒸馏时间2.5 h,浸泡时间1.5 h,在此条件下,小黄姜精油的提取率为2.70%;小黄姜精油中共检测出58种化学成分,相对含量在0.50%以上的挥发性化学成分有20种,其中,姜烯含量最高,为27.14%,其次是β-倍半水芹烯、α-金合欢烯和β-水芹烯;小黄姜精油对ABTS自由基和DPPH自由基均具有较强的清除能力,其IC 50分别为0.450 5 mg/mL和0.703 7 mg/mL;与市售姜精油相比,小黄姜精油显示出更强的抑菌性能,在抑制大肠杆菌(革兰氏阴性菌)方面更具优势.Abstract: Zingiber officinale Roscoe was used as materials to extracting the essential oil by simultaneous-distillation and solvent extraction.Single factor test and orthogonal test were carried out to obtain optimal conditions.The composition of essential oils was analyzed by GC-MS,and antibacterial activity and antioxidant activity of the essential oil were further studied.Results showed that the optimal process conditions of Zingiber officinale Roscoe essential oil were 1:24 solid-liquid ration,2.5 h extraction time and 1.5 h soaking time,and the yield of essential oil was 2.70%.A total of 58 chemical components were detected in the essential oil of Zingiber officinale Roscoe,and there were 20 kinds of volatile chemical components with a relative percentage of more than 0.50%.Among them,the content of Zingiberene was the highest,which was 27.14%,followed by β-sesquiphellandrene,α-faresene and β-phellandrene.Meanwhile,essential oil had significant scavenging effect on ABTS radicals and DPPH radicals,the IC 50 were 0.450 5 mg/mL and 0.703 7mg/mL,respectively.Compared with the commercial ginger essential oil,the Zingiber officinale Roscoe essential oil had stronger antibacterial effect,which had more advantages in inhibiting Escherichia coli(Gram-negative bacteria).
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