Laboratory of Bioprocess and Postharvest Engineering, Department of Agricultural Engineering, Faculty of Agriculture, Lampung University, Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Lampung Indonesia 35145.
* Corresponding author.
A nondestructive measurement of soluble solids content in pineapple fruit using short wavelength near infrared (SW-NIR) spectroscopy is proposed. The optimum conditions of measurement were investigated for spectra acquisition at an integration time of 150 ms and number of scanning of 100 scans. A number of 42 pineapple fruits were used as sample. The samples were divided into two groups, 24 samples for developing calibration model and 18 samples for performing validation test. The result showed that the best calibration model using short wavelength of 700–960 nm was identified with coefficient of determination (R2) of 0.94 and standard error of prediction (SEP) of 0.88% Brix. The calibration model resulted in high RPD value of 2.20.
pineapple, SW-NIR, nondestructive measurement, soluble solids content
