湖南农业大学学报（自然科学版）2018，Vol.44Issue(3)：251-255,5.DOI:10.13331/j.cnki.jhau.2018.03.005
基于近红外漫反射光谱和化学计量学方法的晒红烟常规化学指标的快速测定
Rapid determination of routine chemical index in dark sun-cured tobacco by near infrared diffuse reflectance spectroscopy and chemometrics methods
摘要
Abstract
Near infrared spectra of 138 tobacco leaves samples of dark sun-cured tobacco were measured by fourier transform near infrared diffuse reflectance spectroscopy. Seven outliers were removed with chemometrics method and the remaining 131 samples were divided into training set and prediction set by the Kennard-Stone algorithm. Spectrum values and routine chemical indexes determined by chemometrics method were combined to establish calibration models by partial least squares method. The accuracy of the models was improved by the spectral preprocessing and variable selection methods. Quantitative analysis of total chlorine, total nitrogen, total alkaloid, total potassium, total sugar,reducing sugar and protein of dark sun-cured tobacco was achieved and the results obtained by infrared method have good correlation with those by the conventional methods, with correlation coefficients of all the models bigger than 0.90,indicating the calibration models can be used for rapid determination of the routine chemical indexes of dark sun-curedtobacco.关键词
晒红烟/近红外漫反射光谱/化学计量学/常规化学指标Key words
dark sun-cured tobacco/near infrared diffuse reflectance spectroscopy/chemometrics method/routine chemical components分类
轻工纺织引用本文复制引用
李跑,马雁军,马莉,杨玉清,杜国荣..基于近红外漫反射光谱和化学计量学方法的晒红烟常规化学指标的快速测定[J].湖南农业大学学报（自然科学版）,2018,44(3):251-255,5.基金项目
国家自然科学基金项目(31601551) （31601551）
湖南农业大学引进人才科学基金项目(15YJ08) （15YJ08）
湖南农业大学青年科学基金项目(16QN24) （16QN24）
