MFA-based research for quantitative determination of flue-cured tobacco and correspondence of varieties

To study the relationship among the chemical composition of flue-cured tobacco and its flavor and yield range,128 tobacco samples from domestic 17 varieties in 14 provinces by the sampling method are collected .Reference to the relevant industry standards and literature method ,the quality of 117 kinds of influence chemical indicators were determined,quantitative flavor Bayes discriminant model was constrcucted by MFA dimension reductioneach,scores construct for each-indicator,and correspondence analysis for the flavor and producing areas was done.The results showed that:① 24 common factors can be proposed by original indicators,the total variance of the original variables was explained as 85.488 percent.②quantitative discriminant model can be used to predict the type of flavor of tobacco samples based on the content of megastigmatrienone,furan,alkali and other substances,the correct rate of back judge and predict are ≥97.0%.③ the analysis results of flavor and variety weighted by the factor scores are overall correspondence with the subjective experience,flavor characteristics of all varieties is sorted as:fragrance:Honghuadajinyuan≥CB-1; intermediate incense:Zunyi 6≥Guiyan 201>Bina-1>Guiyan 4; flavor:Zhongyan 100>Zhongyan 101≥Yueyan 97>NC55.