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基于电子眼和电子鼻的不同包装片烟醇化品质差异分析

Differences in aging quality of tobacco strips packaged by different methods based on electronic eyes and electronic noses

  • 摘要: 为探究常规和充氮包装方式对醇化片烟品质的影响,建立了基于电子眼和电子鼻的烟叶品质快速鉴别方法。采用IRIS电子眼和Heracles NEO超快速气相电子鼻对不同包装及醇化时间片烟的颜色和挥发性成分进行检测,并进行主成分分析(PCA)和判别因子分析(DFA)。结果表明:①两种包装的醇化片烟颜色相似,主要为黄色到褐色,但充氮包装延缓了烟叶颜色褐变。②从建立的挥发性成分指纹图谱中筛选出乙醇、正丙醇和吡啶等18种主要差异化合物;通过相对气味活度值(ROAV)分析,发现β-大马酮是烟叶的关键差异香气成分,肉豆蔻醚具有重要修饰作用。③包装方式和醇化时间均会影响烟叶醇化品质。在广东存储库,常规包装片烟醇化速度较快,醋酸和吡嗪等成分含量随醇化时间延长增大;而充氮包装醇化能在一定程度上提高片烟品质,但透气性差也会导致吡啶和间二甲苯等不良气味化合物累积。电子眼、电子鼻及二者拟合均能够快速、有效区分不同包装方式和醇化时间的片烟。

     

    Abstract: To investigate the effects of conventional and nitrogen-filled packaging on the quality of aged tobacco strips, a rapid tobacco quality identification method based on electronic eyes and electronic noses was developed. IRIS electronic eyes and Heracles NEO ultra-fast gas-phase electronic noses were used to determine the color and volatile components of tobacco strips with different packaging methods and aging durations. The data obtained was analyzed by Principal Component Analysis (PCA) and Discriminant Factor Analysis (DFA). The results showed that: 1) The main colors of two types of packaging of aged tobacco strips were similar, i.e. yellow to brown, but the nitrogen-filled packaging delayed the color browning of the tobacco strips. 2) Eighteen major differential compounds including ethanol, n-propanol and pyridine were identified from the aged tobacco strips packaged by the different methods using the established volatile component fingerprints. The results of relative odor activity value (ROAV) analysis of the major differential compounds indicated that β-damascenone was a major differential aroma component in tobacco strips and myristicin was an important modifying agent. 3) Both packaging method and aging time affected the aging quality of the tobacco strips. In the Guangdong warehouse, the aging rate of tobacco strips packaged by the conventional method was relatively fast, and the acetic acid and pyrazine contents increased with the aging time. The nitrogen-filled aging could improve the quality of the tobacco strips to a certain extent, but the undesirable odor compounds such as pyridine and m-xylene would accumulate due to the poor air permeability. Overall, the electronic eyes and the electronic nose techniques and their combination could quickly and effectively differentiate between tobacco strips with different packaging methods and aging time.

     

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