杜廣芬,蔡志華,代 斌,何 林
(新疆兵團化工綠色過程重點實驗室,石河子大學化學化工學院,新疆石河子832000)
超聲波-微波協同提取沙棘總黃酮的研究
杜廣芬,蔡志華,代 斌,何 林*
(新疆兵團化工綠色過程重點實驗室,石河子大學化學化工學院,新疆石河子832000)
對超聲波-微波協同提取沙棘總黃酮進行了研究。通過單因素實驗分別考察了乙醇濃度、提取時間、微波功率、料液比等因素對沙棘總黃酮提取率的影響。在此基礎上,通過正交實驗確定了沙棘總黃酮的最佳提取參數,并與文獻報道的溶劑回流法、微波法、超聲波法等進行了對比研究。結果表明,在乙醇濃度為50%,提取時間180s、微波功率240W、料液比為1∶50g/mL時,沙棘總黃酮最高得率為1.72mg/g;超聲波-微波協同提取法優于溶劑回流法、超聲輔助法以及微波法等提取方法。
超聲波-微波,沙棘總黃酮,提取
Abstract:Ultrasonic-microwave synergistic extraction of total flavonoids from Hippophae rhamnoides was investigated.The main factors that influence the extraction,including the concentration of etnanol,extration time,power of microwave and the ratio of liquid to solid were explored through single-factor and orthogonal experiments.The method was compared with refluxing extraction,microwave assisted extraction and ultrasonic assisted extraction.The experimentalresults indicated thatunderoptimalextraction conditions:ethanol concentration was 50%,extraction time was 180s,power of microwave was 240W and the ratio of solid to liquid was 1∶50,The highest output of total flavonoids was 1.72mg/g.While control experiment showed that ultrasonicmicrowave synergistically extraction was more efficient than other extraction methods.
Key words:ultrasonic-microwave;Hippophae rhamnoides total flavonoids;extraction
沙棘屬胡頹子科沙棘屬植物,又名醋柳、黃酸刺、酸刺柳、黑刺等,是一種落葉灌木或小喬木。其具有耐旱、抗風沙等特性,可以在鹽堿化土地上生存,因此被廣泛用于水土保持方面,具有很高的生態價值。沙棘為藥食同源植物,其根、莖、葉、花、果,特別是沙棘果實含有豐富的營養物質和生物活性物質,可以廣泛應用于食品、醫藥等多個領域[1-2]。黃酮類化合物是沙棘的主要活性成分,具有抗心肌缺血、抗氧化、降低血脂及預防心血管疾病等多種醫療保健作用[3-6]。沙棘黃酮的提取方法主要有微波輔助法、超聲波法、溶劑回流法等方法[7-10],但這些方法都存在耗時長、提取效率不高等問題。……