食品科学 ›› 2020, Vol. 41 ›› Issue (14): 255-261.doi: 10.7506/spkx1002-6630-20190727-361

• 成分分析 • 上一篇    下一篇

顶空固相微萃取结合气相色谱-质谱联用对水塔陈醋挥发性风味成分的分析

杨馥秀,周考文,   

  1. (1.北京联合大学生物化学工程学院,北京 100023;2.生物质废弃物资源化利用北京市重点实验室,北京 100023)
  • 发布日期:2020-07-29
  • 基金资助:
    北京市自然科学基金项目(2152013);北京市教委科技计划重点项目(KZ201311417038); 北京联合大学研究生资助项目

Analysis of Volatile Flavor Components in Shuita-Branded Vinegar by Headspace Solid Phase Microextraction and Gas Chromatography-Mass Spectrometry

YANG Fuxiu, ZHOU Kaowen   

  1. (1. College of Biochemical Engineering, Beijing Union University, Beijing 100023, China;2. Beijing Key Laboratory of Biomass Waste Resource Utilization, Beijing 100023, China)
  • Published:2020-07-29

摘要: 为探究水塔陈醋挥发性风味成分的组成,采用顶空固相微萃取-气相色谱-质谱联用法对水塔陈醋进行分析,以总峰面积及有效化合物个数为指标考察NaCl添加量、萃取温度、萃取时间和解吸时间4 个因素,得出最优萃取条件为在7 mL醋样中加2.5 g NaCl,选用CAR/DVB/PDMS萃取头在80 ℃萃取80 min,解吸5 min。在最佳实验条件下通过对总离子流色谱图解卷积识别化合物,经NIST14谱库及相对保留指数进行定性,以2-辛醇为内标确定各成分的相对含量。共鉴定出75 种化合物,包括酯类16 种、醛类15 种、酸类12 种、杂环类10 种、醇类6 种、酮类10 种、酚类3 种和醚类3 种。其中,21 种物质香气活性值不小于1,鉴定水塔陈醋中主要香气活性成分。

关键词: 水塔陈醋;顶空固相微萃取;气相色谱-质谱联用法;挥发性风味物质

Abstract: The volatile flavor components of Shuita-branded vinegar were analyzed by headspace solid phase microextraction coupled to gas chromatography-mass spectrometry (HS-SPME-GC-MS). The effects of salt addition, extraction temperature, extraction time and desorption time on the total peak area and the number of effective compounds were investigated. The optimum extraction conditions were determined as follows: after being added with 2.5 g of NaCl, 7 mL of vinegar sample was extracted for 80 minutes at 80 ℃ with a CAR/DVB/PDMS extraction fiber. The optimum desorption time was 5 min. Under the optimum experimental conditions, the compounds were recognized by their deconvoluted total ion current chromatograms, qualitatively determined by Kovats index according to NIST14 mass spectral library and quantified with 2-octanol as an internal standard. A total of 75 compounds were separated and identified, including 16 esters, 15 aldehydes, 12 acids, 10 heterocyclic compounds, 6 alcohols, 10 ketones, 3 phenols and 3 ethers. Among them, 21 compounds with OAV ≥1 were identified as the main aroma-active components.

Key words: Shuita-branded vinegar; headspace solid phase microextraction; gas chromatography-mass spectrometry; volatile flavor compounds

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