The objective of this study was to develop the calibration model for predicting the patchouli alcohol in patchouli oil by portable Near Infrared (NIR) spectroscopy. Patchouli oil samples were obtained from different origin in Indonesia.... more
The objective of this study was to develop the calibration model for predicting the patchouli alcohol in patchouli oil by portable Near Infrared (NIR) spectroscopy. Patchouli oil samples were obtained from different origin in Indonesia. Portable NIR spectrometer with wavelength of 760-1050nm was used to collect the spectra of the patchouli oils. The calibration model was developed by partial least square regression (PLS). The best model for predicting patchouli alcohol content is y = 0.7209x + 8.2804 with r = 0.86, SEC = 2.04%, SEP = 2.16%, CV = 7.6, RPD = 1.8.
