Minimally Destructive Evaluation of Durian Maturity Using Near Infrared Spectroscopy.

บทคัดย่อ

This research studied minimally destructive evaluation of durian maturity by near infrared spectroscopy (NIRS) in order to solve a exporting problem of immature durians. One hundred durian samples of variety Mongthong were harvested at number of days after anthesis from 101 days to 122 days. The absorbance was acquired from the whole fruit with sliced rind and compare with the absorbance of the pulp. Obtained absorbances and measured dry matter percentage were used to develop a predicting model with partial least squares regression. The analysis results showed that a model based on pulp absorbance using FT-NIR spectrometer yielded better accuracy in prediction of the dry matter content (coefficient correlation, r_p and root meant square error of prediction of 0.78 and 3.02% respectively) than the model based on absorbance from the whole fruit with sliced rind (r_p = 0.69 and RMSEP = 3.57%). Although the accuracy of the two models appeared to be similar, the errors from the two models were found to be different significantly. However, the outcome of this study presented the possibility of using minimally destructive technique for evaluation of the dry matter content.