Nondestructive measurement of sweet persimmon texture quality based on NIR spectra

The aim of this study was to establish mathematical relationship between near infrared diffuse reflection spectroscopy and texture qualities of sweet persimmon, and to evaluate its application value.Flesh firmness, cohesiveness, chewiness were used in this paper as the evaluation index, in the spectral region between 400~ 2500nm, different pretreatment was used to set up calibration model, then the optimal model was used to predict 50 unknown samples.The results showed that RMSEP of flesh firmness was 0.824, RP2 was 0.844, RPD was 2.40;RMSEP of cohesive was 0.05, RP 2was 0.862, RPD was 2.56;RMSEP of chewiness was 0.443, RP 2was 0.837, RPD was 2.37.This study showed that nondestructive measurement of texture qualities of sweet persimmon using NIR spectroscopy technique was feasible.