Study on Origin Tracing of Mung Bean Based on Near-infrared Spectrum
In order to explore the feasibility of mung bean origin identification,rapid identification of the origin of mung bean from Baicheng,Dumeng,Tailai and Sishui was realized.Near-infrared spectroscopy with PLS-DA method(partial least squares discriminant analysis)was used for modeling,and 120 samples of mung bean powder from four producing areas were scanned by near-infrared spectrum.Different spectral preprocessing methods[standard normal transformation(SNV),multiple scattering correction(MSC),vector normalization and derivative processing,etc.]were used to determine that the model established by vector normalization+MSC was the most stable,and the modeling wavelength was 12000～4000 cm-1 full wavelength.Three effective principal components were extracted by principal component analysis(contribution rate of principal component 1 was 52.44%,that of principal component 2 was 30.16%,and that of principal component 3 was 9.57%),and their cumulative contribution rate reached 92.17%.The prediction accuracy of Baicheng,Dumeng,Tailai and Sishui is 100%,80%,80%and 100%,respectively.The predicted results reached more than 80%,and it was preliminarily recognized that near infrared spectroscopy could be used to trace the origin of mung bean.
mung beanorigin identificationnear-infrared spectrumprincipal component analysispartial least squares discriminant analysis
万方数据
维普
