Quantitative determination of peroxide value in thermally oxidized palm olein by Fourier transform infrared spectroscopy

A simple and rapid quantitative method to determine peroxide value (PV) of palm olein has been developed using transmittance Fourier transform (FT) IR spectroscopy. Palm olein was oxidized and blended with unoxidized palm ole in to generate samples with PVs in the range 3.52-9,86, These samples were used in the calibration and validation steps. A calibration model based on partial least-squares analysis was constructed using the spectral and chemi cal data of the calibration set. Evaluation of the calibration model was ca rried out by cross-validation. The standard error of prediction and coeffic ient determination obtained from the cross-validation equation were 0.172 P V and 0,996, respectively. The standard deviation of the difference for rep roducibility of the FTIR method was found to be better than that of the che mical method. The FTIR method would be suitable for PV determinations in th e palm olein industry and takes an average of less than 2 min per sample. C opy-right (C) 2000 John Wiley & Sons, Ltd.