Analysis of volatile components in meat of steamed Chinese Mitten Crab (Eriocheir sinensis) farmed in different regions
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摘要: 采用新型材料—固相萃取整体捕集剂（MonoTrap）作为顶空固相萃取的吸附材料,对松江、阳澄湖和崇明三地中华绒螯蟹肉中的挥发性成分进行捕集,并结合气相色谱-质谱联用仪（GC-MS）对捕集的挥发性成分进行分离鉴定。基于各挥发物的感受阈值,以相对气味活性值（ROAV）法确定了三产地蟹肉的主体呈香化合物,并对其产生途径进行了探讨。结果表明:三产地样品中共鉴定出81种挥发性成分,其中19种为主体呈香物质（ROAV≥1）。在所有主体呈香物质中,3-甲基丁醛、2-甲基丁醛、己醛、庚醛、4-庚烯醛、苯甲醛、辛醛、壬醛、癸醛、2-乙基呋喃、2-戊基呋喃、三甲胺、3-乙基-2,5-二甲基吡嗪和1-辛烯-3-醇这14种物质为三产地蟹肉样品所共有;而2-丁烯醛、1-戊烯-3-酮、2-癸酮和2-戊基吡啶这4种物质为崇明蟹肉样品所独有。
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关键词:
- 中华绒螯蟹 /
- 固相萃取整体捕集剂 /
- 气相色谱-质谱联用仪（GC-MS） /
- 相对气味活性值(ROAV)
Abstract: In this study, a new type of material ( MonoTrap) was applied as the adsorbent for headspace sampling to extract the volatile compounds in the meat of steamed Chinese mitten crab ( Eriocheir sinensis) farmed in three different regions.The volatile compounds were then isolated and identified by GC- MS and a total of 81 volatile compounds were finally detected. Based on the odor threshold, 19 key aroma compounds whose ROAV values greater than 1 were further selected and their formation mechanism were also discussed in detail.Among the 19 key aroma compounds, 3- methyl- butanal, 2- methyl- butanal, hexanal, heptanal, 4- heptenal, benzaldehyde, octanal, nonanal, decanal, 2-ethyl-furan, 2-pentyl-furan, trimethylamine, 3-ethyl-2, 5-dimethyl-pyrazine and 1-octen-3- ol were found in the meat of Eriocheir sinensis farmed in all three regions, while 2- butenal, 1- penten- 3- one, 2-decanone and 2-pentyl-pyridine were only found in the meat of Eriocheir sinensis farmed in Chongming region. -
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