Abstract:In order to establish the relationships of the visible and near infrared diffuse reflection(VIS/NIR) spectroscopy and peel browning and flesh browning of Mopan persimmon,calibration results for peel color b* and flesh turbidity of Mopan persimmon were compared with different treatment methods in the whole spectral region between 570 and 1 848 nm.The results showed that the modified partial least squares(MPLS) model,with respect to original spectra and None treatment,provided better prediction performance for peel color In order to establish the relationships of the visible and near infrared diffuse reflection(VIS/NIR) spectroscopy and peel browning and flesh browning of Mopan persimmon,calibration results for peel color b* and flesh turbidity of Mopan persimmon were compared with different treatment methods in the whole spectral region between 570 and 1 848 nm.The results showed that the modified partial least squares(MPLS) model,with respect to original spectra and None treatment,provided better prediction performance for peel color b * of persimmon,with correlation coefficient of prediction(R p 2) and the root mean square error of prediction(RMSEP),ratio performance deviation(RPD) of 0.968,1.417 7,and 7.92 respectively.And the partial least squares(PLS) model,with respect to the first derivative D1 log(1/R) and None treatment,provided better prediction performance for flesh turbidity of persimmon,with R p 2,RMSEP and RPD of 0.757,0.107 9,and 2.22 respectively.Therefore,nondestructive measurement of peel color b * and flesh turbidity of Mopan persimmon using VIS/NIR spectroscopy technique was feasible.of persimmon,with correlation coefficient of prediction(R p 2) and the root mean square error of prediction(RMSEP),ratio performance deviation(RPD) of 0.968,1.4177,and 7.92 respectively.And the partial least squares(PLS) model,with respect to the first derivative D1 log(1/R) and None treatment,provided better prediction performance for flesh turbidity of persimmon,with R p 2,RMSEP and RPD of 0.757,0.107 9,and 2.22 respectively.The aboved results demonstrated that VIS/NIR spectroscopy technique was feasible to nondestructive determination of peel color b * and flesh turbidity of Mopan persimmon.
