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    电子鼻检测烤后烟叶挥发性组分的方法研究

    Study on the Method of Using Electronic Nose to Detect the Volatile Components in Cured Leaves

    • 摘要: 本研究采用电子鼻系统对不同形态烤后烟样进行测定,以便初步建立一个烤后烟叶挥发性组分判别检测的方法。结果表明,不同样品形态、同一样品不同放置时间均对电子鼻检测效果有一定影响。对于烟丝样品,放置4 h检测为宜;对于烟末样品,放置30 min检测为宜;采用烟丝样品检测效果优于烟末样品。结果分析表明,线性判别分析(LDA)比主成分分析(PCA)更能有效的区分不同样品,并且LDA分析的结果更能代表样品的整体特征。传感器Loadings分析表明,烟丝样品检测时贡献率较大的传感器是2、7、8、9;烟末样品检测时贡献率较大的传感器是2、7、9。利用电子鼻技术在合适的条件下,可以对不同品种不同部位的烟样进行区分和鉴别。

       

      Abstract: This study attempted to use electronic nose system to measure cured tobacco leaf samples of various forms, so that a method for determining volatile component in tobacco leaves could be established. The results showed that the detection results were influenced by tobacco forms and storage periods. Storage time of 4 hours was the best for detecting cut tobacco leaves, and 30 minutes was optimum for tobacco powder. The detection results for cut tobacco was better than those of tobacco powder. Linear discrimination analysis (LDA) discriminate different tobacco materials more effectively than principal component analysis (PCA). The result of LDA could represent overall characteristics of sample. Tested by the Loadings analysis, sensor 2, 7, 8, 9 had higher contribution rates during test cut tobacco sample, while, sensor 2, 7, 9 had higher contribution rates during test tobacco powder. Electronic nose detection could be used to discriminate the varieties or regions produced of flue-cured tobacco leaves.

       

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