APPLICATION of NEAR INFRARED SPECTROSCOPY TO DETERMINE SUGARCANE QUALITY in CORE SAMPLER SYSTEM

Risvan Kuswurjanto, riantarti riantarti, Opal Priya Wening

Sari


Sugarcane quality was evaluated using Near Infrared (NIR) spectroscopy in two sugar factory for payment system. The samples were collected from core sampler system. The parameter of cane quality analysis were brix in cane (BIC), pol in cane (PIC) and fibre in cane (FIC). The target of this study was to develop and improve model calibration of NIR for cane quality. NIR reflectance spectra ranging from 900 – 1700 nm were collected to evaluate the sugarcane quality of shredded cane. The conventional method to determine cane quality was using Wet Disintegrator method. SX-plus software from Buchi was used as data treatment and model development. The NIR results was evaluate from high correlation coefficient (R 2 ), standard error calibration (SEC) and high ratio of prediction to deviation (RPD). The accuracies of  NIR analysis for PIC were satisfactory with coefficient of correlation (R 2 ) above 0,90 both for calibration and prediction, SEC 0,528 – 0,630 and higher RPD than other parameters . The accuracies of BIC and fibre remained at unsatisfactory level with coefficient of correlation (R 2 ) below 0,90. The NIR instrument could be use to determine pol in cane for cane payment system purposes.

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