资源植物玉叶金花果实多糖的提取工艺研究
2017-08-11赵玉立程鑫潘绒黄京京李发壮胡晓
赵玉立+程鑫+潘绒+黄京京+李发壮+胡晓倩



摘 要:采用醇沉水提法从资源植物玉叶金花果实中提取粗多糖,通过乙醚脱脂、Savage法脱蛋白得到精多糖。在单因素试验的基础上,采用L9(34)正交试验,探讨pH值、浸提时间、料液比、乙醇醇析体积倍数对玉叶金花果实中精多糖提取率的影响。结果表明,玉叶金花果实中精多糖的最佳提取工艺条件为料液比1∶15(g·mL-1),浸提时间3 h,pH值6,乙醇醇析体积倍数1∶4。在此提取工艺条件下,提取率为2.71%;通过验证此最佳提取工艺稳定可行。
关键词:资源植物;玉叶金花;多糖;单因素试验;正交试验
中图分类号:Q946.3 文献标识码:A DOI 编码:10.3969/j.issn.1006-6500.2017.08.004
Abstract: The crude polysaccharide in the resource plant of Mussaenda esquirolli Lévl. fruit was extracted by alcohol-water extraction, and then the refined polysaccharide were got using degreasing of ether and eluting protein of Sevage reagent. Comparison of single-factor test and then using orthogonal test of L9 (34), 4 factors such as pH, extraction time, liquid ratio, times the size of ethanol alcohol -precipitated to the refined polysaccharide extraction were studied with the extract yield for the evaluation. The results showed that the best conditions for extraction were extracting liquid than 1∶15(g·mL-1), extraction time 3 h, pH 6, 4 times the size of ethanol alcohol-precipitated. Under this extraction process conditions, extract yield was 2.71%, the optimum extraction process was stable and feasible.
Key words: resource plant; Mussaenda esquirolli Lévl.; polysaccharide; single-factor test; orthogonal test
玉叶金花(Mussaenda esquirolli Lévl.),又名白纸扇、野白纸扇、白叶子、凉藤子、大凉藤、小凉藤,属茜草科(Rubiaceae)玉叶金花属(MussaendaLinn)[1]。玉叶金花的花期在每年的 4—8月,可长达 100 d以上。开花时,叶状雪白的萼片及金黄色的花冠显现在树冠上,颜色鲜艳而奇美;玉叶金花枝条细软,既可作造型盆景,也可作建筑的垂直绿化,极具观赏价值。玉叶金花的茎、叶、根、藤均可入药,味甘、淡、凉,具有清热解暑、凉血解毒的功效[2-4]。由玉叶金花制成的保健茶,短期饮用具有润肠舒胃、提高免疫力、预防流感等功效,长期饮用可以保持身体健康,促进微循环。另外,玉叶金花在绿化环境、净化空气、涵养水源、保持水土、改善生态环境等方面极具生态价值。因此,玉叶金花是具有观赏、药用、保健和生态等多种价值的資源植物。
多糖是由超过10 个以上、通常由几百甚至几千个单糖分子聚合而成的一类化合物,由醛糖或酮糖通过糖苷键连接而成,糖苷键分为α型和β型2 种。……
