BLENDS Chemometrics analysis Correlation coefficient Cost effectiveness EDIBLE OILS ELECTRONIC NOSE FATTY-ACID-COMPOSITION HAND-HELD High spectral resolution Infrared devices Least squares approximations Light emitting diodes Linear regression Linear regression methods Low-power consumption NEAR-INFRARED SPECTROSCOPY Palm oil Palmprint recognition Partial least square algorithms QUALITY QUANTIFICATION SPECTROMETERS Signal to noise ratio Site application Spectral resolution Tungsten VEGETABLE-OILS Variable selection methods