食品科学 ›› 2021, Vol. 42 ›› Issue (24): 261-268.doi: 10.7506/spkx1002-6630-20201215-183

• 成分分析 • 上一篇    

不同顶空进样技术结合多同位素内标法对香气物质定量分析的选择性差异

马丽鑫,郑旭,黄旭辉,孙浩媛,徐献兵,董秀萍,秦磊   

  1. (大连工业大学食品学院,国家海洋食品工程技术研究中心,辽宁 大连 116034)
  • 发布日期:2021-12-30
  • 基金资助:
    国家自然科学基金面上项目(32072247);“十三五”国家重点研发计划重点专项(2016YFD0400404)

Difference in Selectivity of Different Headspace Sampling Methods Combined with Multi-isotope Internal Standards for Quantitative Analysis of Aroma Compounds

MA Lixin, ZHENG Xu, HUANG Xuhui, SUN Haoyuan, XU Xianbing, DONG Xiuping, QIN Lei   

  1. (National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China)
  • Published:2021-12-30

摘要: 采用顶空固相微萃取(solid phase microextraction,SPME)、微阱捕集(in-tube extraction,ITEX)、吹扫捕集(purge trapping,P&T)、静态顶空4?种不同顶空进样方式结合气相色谱-质谱联用技术对含有57?种挥发性化合物的溶液进行定量分析。结果表明,使用SPME可检出45?种化合物(PDMS/DVB萃取头),ITEX可检出41?种化合物,静态顶空可检出31?种化合物,P&T可检出20?种化合物。总体而言,ITEX更易检出醛类、烃类化合物(醛类定量限为20?ng/mL,烃类定量限为10?ng/mL),SPME对于醇类、酯类化合物更敏感(定量限均为20?ng/mL),P&T和静态顶空更适合于低沸点化合物的定量。食品基质对SPME和ITEX的影响较小,SPME与ITEX结合能够有效提高获得的食品香气指纹信息的完整性与准确性。本研究结果通过对比不同顶空进样技术的定量能力,并分析多种进样方式结合实现香气信息完整识别的可行性,为食品香气分析提供理论依据。

关键词: 顶空进样;同位素内标;基质效应;定性;定量

Abstract: Mixed aqueous solutions of 57 volatile compounds were quantitatively analyzed by headspace solid phase microextraction (SPME), in-tube extraction (ITEX), purge trapping (P&T) or static headspace combined with gas chromatography-mass spectrometry (GC-MS). The results showed that 45 compounds were detected by SPME with a polydimethylsiloxane/divinylbenzene (PDMS/DVB)-coated fiber, 41 compounds were detected by ITEX, 31 compounds were detected by Headspace, and 20 compounds were detected by P&T. In general, ITEX more easily detected aldehydes and hydrocarbons (with a quantitation limit of 20 ng/mL for aldehydes and of 10 ng/mL for hydrocarbons), SPME was more sensitive to alcohols and esters (with a quantitation limit of 20 ng/mL for both), and P&T and headspace were more suitable for the quantification of low boiling point compounds. The food matrix had little effect on SPME or ITEX. A combination of SPME and ITEX could effectively improve the completeness and accuracy of the obtained food aroma fingerprint information. The results of this study may provide an experimental basis for food aroma analysis.

Key words: headspace; isotope internal standard; matrix effect; qualitative analysis; quantitative determination

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