食品科学 ›› 2012, Vol. 33 ›› Issue (18): 156-161.

• 分析检测 • 上一篇    下一篇

两种浓缩工艺对荔枝汁挥发性风味物质

赵 芳1,2,吴继军1,*,曹清明2,徐玉娟1,肖更生1,温 靖1,唐道邦1,林 羡1   

  1. 1.广东省农业科学院蚕业与农产品加工研究所,广东省农产品加工公共实验室 2.中南林业科技大学食品科学与工程学院
  • 收稿日期:2011-08-08 修回日期:2012-07-30 出版日期:2012-09-25 发布日期:2012-09-07
  • 通讯作者: 吴继军 E-mail:wujijun@126.com
  • 基金资助:

    国家-广东省联合基金

Effects of Two Different Condensation Methods on Volatile Aromatic Compounds in Litchi Juice

  • Received:2011-08-08 Revised:2012-07-30 Online:2012-09-25 Published:2012-09-07

摘要: 采用真空旋转蒸发和结冰-解冻两种方法浓缩荔枝汁,共得到6种液体。运用顶空固相微萃取和气相色谱-质谱联用法对这6种液体和荔枝原汁的挥发性风味物质进行对比分析。同时将两种浓缩方法进行比较。结果表明:不同浓缩方法得到的荔枝汁挥发性风味物质的种类有所不同,真空旋转蒸发浓缩得到的浓缩荔枝汁挥发性风味物质种类总数少,且有煮熟味,失去了荔枝原汁大部分挥发性风味物质,而其馏出液中含有很多挥发性风味物质,种类和数量较多。而结冰-解冻浓缩法得到浓缩汁的挥发性风味物质种类和数量丰富,无煮熟味,基本保留了荔枝的原有风味,而其剩余液中除乙醇外的挥发性风味物质相对含量很少。

关键词: 荔枝汁, 挥发性风味物质, 真空旋转蒸发浓缩, 结冰-解冻浓缩, 固相微萃取, 气相色谱-质谱联用

Abstract: Two different condensation methods, rotary thin film vacuum evaporation and freeze-thawing, were separately used to condense litchi juice, producing 6 samples. The volatile aromatic compounds in litchi juice and 6 condensed samples were comparatively analyzed by headspace solid-phase microextraction and gas chromatography-mass spectrometry (HS-SPME and GC-MS). The condensed litchi juice samples showed variations in volatile aromatic compound profiles. Compared with freeze-thawing, rotary thin film vacuum evaporation resulted in a reduction of the number of volatile compounds found in condensed litchi juice. The litchi juice condensed by rotary thin film vacuum evaporation had a cooked taste and lacked most of the volatile compounds found in original litchi juice and more volatile compounds were found in the distillate in large quantities. In contrast, the litchi juice condensed by freeze-thawing was found to maintain most of the volatile compounds found in original litchi juice in large quantities and have no cooked taste and all volatile compounds except alcohol were found in the distillate in very small quantities.

Key words: litchi juice, volatile aromatic compounds, rotary thin film vacuum evaporation, freeze-thawing condensation, headspace solid phase micro-extraction, GC-MS