Differential Raman Spectral Inspection of Food Grade Plastic Bottles Based on Principal Component Analysis and Fisher Discriminant Analysis
The physical evidence of plastic food grade bottles carries many potential evidentiary information,and the current research on the inspection of such physical evidence is still in the exploratory stage.Using differential Raman spectroscopy,46 food grade plastic bottle samples were examined.These samples can be divided into three categories based on their physical and spectral characteristic peaks.Principal component analysis(PCA)-Fisher discriminant analysis was used to draw a principal component score map,construct a discriminant function,and establish a classification model.The results showed that the food grade plastic bottle samples had a significant clustering relationship,and the accuracy rate of the original classification and cross validation classification reached 100％.Differential Raman spectroscopy combined with PCA-Fisher discriminant analysis has certain scientific significance in testing and identifying the physical evidence of food grade plastic bottles.
NETL
NSTL
万方数据
维普
