食品科学 ›› 2004, Vol. 25 ›› Issue (9): 152-157.

• 分析检测 • 上一篇    下一篇

毛细管气相色谱法测定番茄中的非挥发性有机酸、高级脂肪酸和低分子量糖类

 朱晓兰, 高芸, 苏庆德   

  1. 中国科技大学化学系烟草研究中心
  • 出版日期:2004-09-15 发布日期:2011-10-24

Determination of Nonvolatile Organic Acid, Fatty Acid and Low Molecular Sugars in Tomato by Capillary Gas Chromatography

 ZHU  Xiao-Lan, GAO  Yun, SU  Qing-De   

  1. Tobacco Research Center, Chemistry Department, University of Science and Technology of China
  • Online:2004-09-15 Published:2011-10-24

摘要: 本文提出了应用毛细管气相色谱法(CGC)对番茄内的非挥发性有机酸、高级脂肪酸和低分子量糖类进行测定的方法。番茄样品经匀浆后用水在超声波振荡下提取,减压干燥后, 用羟胺吡啶(2.5mg/ml)先将糖转化为肟,再用硅烷化试剂(BSTFA+1%TMCS)衍生化,然后进行毛细管气相色谱分析。有机酸的测定采取将番茄样品加入H2SO4-CH3OH(10%) 30ml衍生化2h,经萃取、干燥后再进行毛细管气相色谱分析。针对方法的前处理条件、重现性及回收率均进行了探讨。结果显示番茄中糖类主要含有葡萄糖、果糖,酸类主要包括柠檬酸、苹果酸、棕榈酸。此外, 对比不同品种的番茄样品中糖及有机酸含量成分进行了营养对比实验。

关键词: 毛细管气相色谱法, 低分子量糖类, 番茄, 非挥发性有机酸, 衍生化

Abstract: Two capillary gas chromatography methods for the determination of low molecular sugars and nonvolatile organicacid in tomato are described. After crush, tomato samples were extracted from water under ultrasonic surge, then decompressed,desiccated and derivatized with BSTFA+1%TMCS, and analyzed by capillary gas cbromatography. As to determination oforganic acid of tomato, tomato samples was reacted with H2SO4-CH3OH (volume ratio 10%) for two hours, and extracted threetimes with CH2Cl2, then analyzed by capillary gas cbromatography. The optimization strategies for sample preparation and CGCwere discussed in this work. The result suggested that the main low molecular sugars in tomato were glucose and fructose, andthe main acid were citric acid, malic acid and palmitic acid. Moreover, this method has been used to analyze sample of differenttype of tomatoes such as ordinary tomatoes and cherry tomatoes with a satisfactory resolution reproducibility.

Key words: capillary gas chromatography, low molecular sugra, tomato, nonvolatile organic aci, derivation