应用近红外光谱分析不同年度工业分级烟叶的特性

Tobacco Quality Analysis of Industrial Classification of Different Years Using Near-Infrared(NIR) Spectrum

以红塔集团2007年—2010年在云南省玉溪烤烟产区内采集的主要工业分级烟叶样品为试验对象,其品种为红大,包括不同部位及色组的主要工业分级,共计近红外光谱5 730条;应用光谱特征投影及相关分析方法对不同年度的主要分级烟叶近红外光谱的分析结果表明:相同年度下,将各类型工业分级样品随机按2∶1划分为分析集与验证集后,其分析集与验证集特征投影均值的相关系数达0.98以上,具有较好的一致性;不同年度间,其工业分级样品光谱特征投影均值的相关系数在0.97以上,其中年度一致性最高的是2008年和2009年,较低的是2007年和2010年。同时,应用一种相似度计算方法得到了各工业分级样品光谱之间的相似度值,该相似度值以及不同年度之间的一致性系数,可为烟叶的模块配方组合或替代等提供量化的参考数据。

In this study,tobacco quality analysis of main Industrial classification of different years was carried out applying spectrum projection and correlation methods.The group of data was near-infrared（NIR） spectrum from Hongta Tobacco（Group）Co.,Ltd.5730 tobacco leaf Industrial classification samples from Yuxi in Yunnan province from 2007 to 2010 year were collected using near infrared spectroscopy,which from different parts and colors and all belong to tobacco varieties of HONGDA.The conclusion showed that,when the samples were divided to two part by the ratio of 2∶1 randomly as analysis and verification sets in the same year,the verification set corresponded with the analysis set applying spectrum projection because their correlation coefficients were above 0.98.The correlation coefficients between two different years applying spectrum projection were above 0.97.The highest correlation coefficient was the one between 2008 and 2009 year and the lowest correlation coefficient was the one between 2007 and 2010 year.At the same time,The study discussed a method to get the quantitative similarity values of different industrial classification samples.The similarity and consistency values were instructive in combination and replacement of tobacco leaf blending.