基于ATR-FTIR法快速鉴别亳州产菊花品种OA

To establish a rapid and accurate method for the identification of chrysanthemum varieties in Bozhou,we analyzed 11 varieties of Chrysanthemum morifolium Ramat.from Bozhou by combining attenuated total reflectance Fourier-transform infrared(ATR-FTIR)spectroscopy with chemometric methods.First,ATR-FTIR spectral information was collected from all the samples,and the raw spectral data were subjected to multiple preprocessing methods and variable selection to reduce noise interference,enhance the spectral features,and improve the classification ability of the model.Orthogonal partial least squares discriminant analysis(OPLS-DA)was used to classify and identify samples of different chrysanthemum varieties,and its application in pattern recognition was evaluated.The ATR-FTIR spectra reflected the differences in the chemical composition among the different varieties of Chrysanthemum morifolium Ramat.from Bozhou.When combined with chemometric analysis,this method enabled the rapid classification and effective discrimination of different varieties.The OPLS-DA results showed a relatively clear clustering trend among samples from different varieties and visually reflected the differences among the varieties.By comparing and evaluating the various spectral preprocessing and variable selection methods,multiplicative scatter correction combined with second derivative(2nd D)was determined to be the optimal preprocessing method.Furthermore,a support vector machine(SVM)model was established for classification and prediction.The results showed that the SVM model exhibited excellent classification performance and high predictive accuracy,with an accuracy of 100％for the training set and 98.2％for the test set,indicating that the established model possessed good recognition ability and generalization performance.These findings demonstrated that ATR-FTIR combined with chemometric methods can effectively distinguish different varieties of Chrysanthemum morifolium Ramat.from Bozhou.Compared with traditional identification methods,this method has the advantages of simple operation,rapid analysis,high efficiency,and accurate and reliable results.Therefore,this study provided a new technical method and theoretical basis for the identification of chrysanthemum varieties and quality evaluation of Chrysanthemum morifolium Ramat.from Bozhou.