Ten different varieties of fresh grapes,3 different mature period and 1 kind of diseased fruit with a total of188 samples were selected as the research object,and the near infrared spectra of these samples collected by near-infrared spectrometers. Using partial least squares( PLS),the quantitative analysis model with higher credibility by determining the content of total phenol,total sugar,fructose,sucrose and soluble solids. The correlation coefficients of indicators were above 0. 90 except minority were b...
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