单光子电离质谱法用于不同品牌真假酒的快速鉴别

Rapid Identification of True and Fake Wines Using Single Photon Ionization Mass Spectrometry

利用单光子电离飞行时间质谱法(SPI-TOF-MS),结合主成分分析(PCA),在无需样品预处理的条件下,建立了快速准确鉴别酒(包括白酒和劲酒)类样品真假的方法。同时,利用光电子电离质谱法(PEI-TOF-MS)对SPI-TOF-MS的准确度和可靠性进行了验证。结果表明,本方法不仅能快速实现对茅台等5种不同品牌酒的真假区分,还可以对影响酒的品质的特征物质进行分析和鉴定。与其它离子化技术(如EI,PEI,ICP等)相比,SPI作为一种"软"电离源,更容易产生分子离子峰,图谱更简单。因此,本方法有望应用于市场上酒类饮品的真假鉴别及品质的鉴定,对于快速筛选伪劣酒类产品有着重要的应用价值。

A novel method based on single photon ionization time-of-flight mass spectrometry（SPI-TOF-MS） was established for the fast and accurate differentiation of different types of true and fake wines（including white wine and Liquor） combined with principal component analysis（PCA） without any sample pretreatment.Moreover,the accuracy and reliability of analysis by SPI-TOF-MS were validated by photoelectron ionization time-of-flight mass spectrometry（PEI-TOF-MS）.The preliminary results showed that not only five types of true and fake wines（e.g.Maotai,etc.） could be rapidly distinguished respectively in this study,but also the characteristic compounds which influence the quality of the wine were investigated,the signal intensity of characteristic compounds most attributed to the distinctions were obtained.In comparison with other ionization techniques（such as EI,PEI,ICP,etc.）,the softer single photon ionization is easier for the generation of molecule ions and the simpler mass spectrum.The proposed method is a useful tool for the quality evaluation and identification of wines on the market,playing a significant role in the application of rapid screening the inferior liquor products.