Rapid Analysis of Chemical Composition in Paddy Rice using Near Infrared Spectroscopy

Abstract

Paddy rice has been used for feeding economic livestock such as poultry, swine and cattle. Chemical analysis of feedstuffs and feed ingredients are needed for feed formulation. This study aimed to evaluate the feasibility of Near Infrared Spectroscopy (NIRS) as a rapid and non-destructive method for determination of chemical compositions in paddy rice. Sixty-samples of paddy rice were used as samples. All samples were performed the NIR measurements using reflectance mode in the region of 9000-4000 cm^-1 and were then analyzed the chemical compositions, which were crude protein, crude fat, crude fiber and ash. Data analysis was performed using partial least square (PLS) regression. The satisfied results were obtained from the calibration models of crude protein, crude fat and crude fiber, the best PLS results were with coefficient of determination (R²) values more than 0.95 and root mean square error of prediction (RMSEP) of 0.22, 0.12 and 0.43%, respectively. The accuracy of the calibration model of ash was the lowest with R² of 0.78 and RMSEP of 0.25%. The results suggested that NIR spectroscopy had a potential to be a rapid and non-destructive method for the determination of chemical composition in paddy rice.