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電子鼻檢測烤后煙葉揮發(fā)性組分的方法研究

發(fā)布時間:2019-08-24 來源: 美文摘抄 點擊:


  摘 要:本研究采用電子鼻系統(tǒng)對不同形態(tài)烤后煙樣進(jìn)行測定,以便初步建立一個烤后煙葉揮發(fā)性組分判別檢測的方法。結(jié)果表明,不同樣品形態(tài)、同一樣品不同放置時間均對電子鼻檢測效果有一定影響。對于煙絲樣品,放置4 h檢測為宜;對于煙末樣品,放置30 min檢測為宜;采用煙絲樣品檢測效果優(yōu)于煙末樣品。結(jié)果分析表明,線性判別分析(LDA)比主成分分析(PCA)更能有效的區(qū)分不同樣品,并且LDA分析的結(jié)果更能代表樣品的整體特征。傳感器Loadings分析表明,煙絲樣品檢測時貢獻(xiàn)率較大的傳感器是2、7、8、9;煙末樣品檢測時貢獻(xiàn)率較大的傳感器是2、7、9。利用電子鼻技術(shù)在合適的條件下,可以對不同品種不同部位的煙樣進(jìn)行區(qū)分和鑒別。
  關(guān)鍵詞:電子鼻;檢測;煙葉;揮發(fā)性成分;方法
  中圖分類號:S572 文章編號:1007-5119(2014)04-0092-07 DOI:10.13496/j.issn.1007-5119.2014.04.018
  Study on the Method of Using Electronic Nose to Detect the Volatile Components in Cured Leaves
  FENG Li1,2, CHANG Aixia1, GUO Congtao3, LI Yanli1,2, GAO Tingting1,2, WEN Ke4, LUO Chenggang1*
  (1. Tobacco Research Institute of CAAS, Qingdao 266101, China; 2. Graduate School of CAAS, Beijing 100081, China;
  3. Qingdao Agricultural University, Qingdao 266109, China; 4. Sichuan Agricultural University, Chengdu 611130, China)
  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.
  Keywords: electronic nose; detection; tobacco leaf; volatile component; method
  煙葉質(zhì)量是卷煙質(zhì)量的主要決定因素,煙葉香氣是衡量煙葉質(zhì)量的重要指標(biāo)。一直以來,感官評吸是評價煙葉香氣及吃味優(yōu)劣的最主要方法,但感官評吸主觀性較強(qiáng)且影響人體健康,樣品量大時難以有效進(jìn)行[1]。隨著分析檢測技術(shù)的發(fā)展,人們開始利用氣相色譜/質(zhì)譜聯(lián)用技術(shù)(GC/MS),對煙葉香吃味的物質(zhì)基礎(chǔ)進(jìn)行探索,以期能夠找到客觀的評價煙葉香吃味的方法,但這些檢測方法檢測費用昂貴,前處理方法繁瑣,檢測周期長,特別是所得氣味都是經(jīng)樣品分離后的結(jié)果,很難代表樣品的整體性,與人的嗅覺很難作系統(tǒng)化和科學(xué)化的對照[2]。近年來,研究人員開始將氣敏傳感器陣列和模式識別技術(shù)相結(jié)合,構(gòu)造了能夠?qū)ι镄嵊X功能進(jìn)行模擬的電子鼻。與其他常規(guī)儀器分析法如色譜-質(zhì)譜聯(lián)用、色譜-紅外聯(lián)用、核磁共振等波譜技術(shù)相比,操作簡便,樣品前處理簡單,測定速度快、基本不用
  基金項目:國家煙草專賣局項目“‘濃香型’烤煙品種的選育及應(yīng)用研究”(110200902044)
  作者簡介:馮 莉,女,在讀碩士,從事作物遺傳育種理論與方法研究。E-mail:fengliyebo520@163.com。*通信作者,E-mail:ctsqz@163.net

相關(guān)熱詞搜索:揮發(fā)性 組分 煙葉 檢測 方法

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