超高压及热处理对中国沙棘原浆挥发性成分影响的比较  被引量:7

A Comparison of the Effects of Ultra-High Pressure and Heat Treatments on the Volatile Components of Chinese Seabuckthorn Pulp(Hippophae rhamnoides L. subsp. sinensis Rousi)

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作  者:黄蕊 盛文军[1] 李霁昕[1] 冯丽丹[1] 毕阳[1] HUANG Rui;SHENG Wenjun;LI Jixin;FENG Lidan;BI Yang(College of Food Science and Engineering,Gansu Agricultural University,Lanzhou 730070,China)

机构地区:[1]甘肃农业大学食品科学与工程学院,甘肃兰州730070

出  处:《食品科学》2018年第18期204-208,共5页Food Science

基  金:国家国际科技合作专项(2014DFR31230)

摘  要:比较超高压及热处理对沙棘原浆挥发性成分的影响差异。沙棘原浆经500 MPa超高压30℃处理15 min(处理组),或90℃热处理40 min(对照组),采用顶空固相微萃取结合气相色谱-质谱联用技术分析处理对沙棘原浆挥发性成分的影响。结果表明,超高压处理可提高沙棘原浆中的挥发性成分,处理组的挥发性成分总含量高于对照组61%;处理组各类挥发性成分含量均与对照组存在显著差异,其中醇类和酯类的含量显著高于对照组;除酯类和酸类成分的种类低于对照组外,处理组其他挥发性成分的种类与对照组之间无差异。根据气味活性值大于0.2的原则,确定12种对沙棘原浆香气贡献较大的组分,其中α-松油醇、己酸乙酯等10种组分处理组高于对照组,壬醛和3-甲基丁酸处理组显著低于对照组。综上所述,超高压处理可显著提高沙棘原浆中的挥发性成分,其作用与促进底物释放,激活糖苷酶和酯酶分解结合态挥发性成分密切相关。This work was conducted to compare the effects of ultra-high pressure(UHP)and heat treatments on the volatile components of Chinese seabuckthorn pulp.The pulp was subjected to UHP treatment at 500 MPa at 30℃for 15 min or heat treatment at 90℃for 40 min.The volatile components of the two treated samples were analyzed by headspace solid-phase micro-extraction combined with gas chromatography-mass spectrometry(HS-SPME-GC-MS).The results showed that UHP treatment increased the amount of volatile components in seabuckthorn pulp by 61%as compared to heat treatment.A significant difference in the content of each group of volatile components was found between both treatments and the contents of alcohols and esters were significantly higher in the UHP-treated pulp than in the heat-treated pulp;the UHPtreated pulp contained more esters and acids,while there was no difference was observed for all other groups of volatile compounds.A total of 12 aroma compounds with odor activity value greater than 0.2 were identified in seabuckthorn pulp and of these,10 includingα-terpineol and ethyl hexanoate were more abundant in the UHP-treated pulp than in the heattreated pulp while nonanal and 3-methyl butyric acid were significantly lower.To sum up,UHP treatment significantly improved the volatile composition of Chinese seabuckthorn pulp,which was closely related to promoting the release of substrates and activating glycosidase and esterase for the breakdown of bound volatile compounds.

关 键 词:沙棘原浆 超高压处理 热处理 挥发性成分 

分 类 号:TS255.3[轻工技术与工程—农产品加工及贮藏工程]

 

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