摘要
通过单因素和响应面实验探究5种提取工艺(超声辅助提取、酸解提取、酶解提取、热水提取、热醇提取)对弯萼金丝桃总黄酮(TF)提取量的影响。采用HPLC测定并分析主要黄酮苷元的分布及含量,并进一步考察了TF与体外抗氧化活性〔1,1-二苯基-2-三硝基苯肼自由基(DPPH•)清除能力、2,2'-联氮-双(3-乙基苯并噻唑啉-6-磺酸)二铵盐自由基(ABTS•)清除能力、•OH清除能力、还原能力〕的相关性及对α-葡萄糖苷酶的体外降糖能力。结果表明,超声辅助提取TF提取量最高。响应面优化最佳提取工艺为:超声提取温度68℃、提取时间23 min、乙醇体积分数24%、溶剂与样品的液料比(mL∶g)63∶1。在该条件下,TF提取量为34.85 mg RT/g〔以每克弯萼金丝桃中黄酮类化合物相当于芦丁(RT)的质量表示〕。经HPLC鉴定出TF中含有7种主要黄酮类化合物,其中,含量最高的为槲皮素-3-O-洋槐糖-7-O-鼠李糖苷和槲皮素,分别为3.897和2.874 mg/g;TF质量浓度与DPPH•清除能力、ABTS•清除能力、•OH清除能力、还原能力呈显著正相关,TF对α-葡萄糖苷酶的降糖能力可达到92.6%。
The influence of five extraction processes(ultrasound-assisted extraction,acid extraction,enzymatic extraction,hot water extraction,hot alcohol extraction)on the total flavonoids(TF)from Hypericum benthamii was investigate by single factor and response surface experiments,with the distribution and content of major flavonoid glycosides determined and analyzed by HPLC.The correlation between TF and in vitro antioxidant activity[1,1-diphenyl-2-trinitrophenylhydrazine free radical(DPPH•)scavenging ability,2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)diammonium salt(ABTS•)scavenging ability,•OH scavenging ability,reducing ability]along with its in vitro hypoglycemic ability toα-glucosidase were further investigated.The results showed that ultrasound-assisted extraction achieved the highest TF content,and the best extraction process optimized by response surface experiment was obtained.Under the conditions of ultrasonic extraction temperature 68℃,extraction time 23 min,ethanol volume fraction 24%,liquid to material ratio of solvent to sample(mL∶g)63∶1,the TF content reached 34.85 mg RT/g[Equivalent rutin(RT)mass per gram of TF compound expressed].Seven major flavonoids in TF was identified by HPLC,with the most abundant flavonoid compounds of quercetin-3-O-palmitoyl-7-O-rhamnoside with 3.897 mg/g and quercetin with 2.874 mg/g.There was a significant positive correlation between TF mass concentration and DPPH•scavenging ability,ABTS•scavenging ability,•OH scavenging ability and reducing ability.The hypoglycemic capacity of TF toα-glucosidase could reach 92.6%.
作者
王俊龙
蔺永刚
陈凤霞
时文盼
陈禹
WANG Junlong;LIN Yonggang;CHEN Fengxia;SHI Wenpan;CHEN Yu(Xinjiang Key Laboratory of Clean Conversion and High Value Utilization of Biomass Resources,Yili Normal University,Yining 835000,Xinjiang,China;School of Pharmacy,Xinjiang Medical University,Urumqi 830017,Xinjiang,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2024年第5期1050-1059,1083,共11页
Fine Chemicals
基金
新疆维吾尔自治区自然科学基金项目(2022D01C455)
2023年度伊犁师范大学校级重点项目(2023YSYY002)
伊犁师范大学提升综合实力专项重点项目(22XKZZ08)
伊犁师范大学科研创新团队项目(CXZK2021003)。
关键词
弯萼金丝桃
总黄酮
提取工艺
高效液相色谱
抗氧化活性
降糖活性
中药现代化技术
Hypericum benthamii
total flavonoids
extraction process
HPLC
antioxidant activity
hypoglycemic activity
modernization technology of traditional Chinese medicines