Abstract
Developing a unified calibration model to assess pol content in sugarcane juice extracted using different methods can
substantially reduce the costs of developing individual models and improve operational efficiency. A benchtop
spectrophotometer (400–2,500 nm) was used to acquire transflectance spectra of sugarcane juice extracted using the direct
extraction method (DEM) and the shredded extraction method (SEM). DEM yielded a higher pol content of 0.67 % compared
with that of SEM. The unified partial least squares (PLS) calibration model accurately predicted the pol content in the DEM
and SEM samples, as well as that of mixed samples, with root mean square error of prediction (RMSEP) values of 0.23 %,
0.21 %, and 0.23 %, respectively.
