摘要
采用固相微萃取(SPME)与气-质联用(GC-MS)技术分析杂环化合物在镇江香醋陈酿过程中的变化。结果表明:从6个陈酿时间的镇江香醋中共检测到27种杂环化合物,主要由吡嗪、恶唑、呋喃及吡咯4类化合物组成。除陈酿78个月的镇江香醋外,糠醛是其他5个陈酿时间镇江香醋中含量最高的杂环化合物,并且其含量随陈酿时间的增加呈不断下降的趋势。其它杂环化合物含量大都随陈酿时间的增加而增加,尤其是四甲基吡嗪、三甲基吡嗪、2,6-二乙基吡嗪和三甲基恶唑,是镇江香醋中含量最高的吡嗪和恶唑类化合物,陈酿时间的延长对其影响极显著,可作为镇江香醋陈酿时间鉴别的重要指标。2-乙基-4,5-二甲基恶唑等4种恶唑化合物在镇江香醋中首次被发现。杂环化合物种类丰富、含量较高,是形成香醋,特别是陈酿时间较长的镇江香醋特有风味的重要原因。
The changes of heterocyclic compounds in Zhenjiang aromatic vinegar during ageing were studied by sol- id-phase microextraction （SPME） and Gas chromatography and mass spectrometry（GC-MS）. The result showed that twen- ty-seven heterocyclic compounds were detected in six kinds of aging time, mainly composed of pyrazine, oxazole, furan and pyrrole. In addition to Zhenjiang aromatic vinegar aged 78 months, the content of furfural is the highest among the heterocyclic compounds in the other 5 kinds of aging time of Zhenjiang aromatic vinegar. With the increase of aging time, the content of furfural decreased, but most other heterocyclic compounds increased, especially tetramethyl pyrazine, trimethyl pyrazine, 2,6-diethyl-pyrazine, and trimethyl oxazole, whose content was the highest in Zhenjiang aromatic vinegar among the pyrazine and oxazole compounds. With the increase of aging time, the content of tetramethyl pyrazine, trimethyl pyrazine, 2,6-diethyl-pyrazine, and trimethyl oxazole was influenced extremely significantly and they were an important indicator of the identification of Zhenjiang aromatic vinegar ageing time. Four oxazole compounds, such as 2- ethyl--4,5-dimethyl oxazole, were discovered in Zhenjiang aromatic vinegar firstly. Heterocyclic compounds, which were rich and high content in the Zhenjiang aromatic vinegar, were an important factor in the formation of the unique flavor of Zhenjiang aromatic vinegar, especially in a longer ageing time.
出处
《中国食品学报》
EI
CAS
CSCD
北大核心
2015年第6期199-205,共7页
Journal of Chinese Institute Of Food Science and Technology
基金
国家自然科学基金项目(31071549)
江苏省自然科学基金项目(SBK201241449)
江苏省普通高校研究生科研创新计划资助项目(CX09B_214Z)
江苏省高校自然科学基金项目(10KJD55001)
江苏省物理加工重点实验室开放基金项目(JAPP2010-8)
江苏高校优势学科建设工程资助项目
