Rapid Determination of Peroxide Value in Crude Palm Oil Products Using Fourier Transform Infrared Spectroscopy

Abstract

A rapid Fourier transform infrared (FTIR) spectroscopic technique coupled with fixed NaCl cell (1 mm pathlength) was developed to measure peroxide value (PV) in crude palm oil (CPO) and crude palm kernel oil (CPKO). Calibration standards were prepared by oxidizing CPO in a fermentor at 60C over a period of 24 h. A partial least squares (PLS) calibration model for predicting PV was developed based on the 3710–3210 cm‐1spectral region with reference to a single‐point baseline at 3710 cm‐1. The optimization of calibration factors was guided by the predicted residual error sum of squares (PRESS) test. The standard deviation (SD) of the calibration obtained was 0.46 PV over the range of 0.51–17.82 PV and the correlation coefficient (R2) was 0.998. The model was validated with an independent set of samples consisting of both laboratory and field samples. The overall SD for the validation set was sligthly higher (SD = 1.46 PV) with R2 of 0.989. Thus, it was demonstrated that PV measured by FTIR techniques was comparable to that obtained by the chemical method. The FTIR method has the

Quantitative Analysis of Peroxide Value in Virgin Coconut Oil by ATRFTIR Spectroscopy

“…The hydroperoxide bands have been reported at 3450 cm -1 , due to -OO-H stretching vibration of the oxidized methyl octadecadieonate [4]. The formation on hydroperoxide band however was not observable in this study.…”

“…(1) shows the FTIR spectrum of VCO. One of the main feature of the spectrum is in the region of 3050 to 2800 cm -1 which was attributed to the absorbance of CH stretching vibrations (cis-CH=CH-, -CH 2 -, CH 3 , CH 2 /CH 3 ) [4]. The region between 1400 to 900 cm -1 is due to the stretching of C-O-C and CH bending [7].…”

“…FTIR has been reported for use of quantification of various oil parameters including peroxide value. Peroxide value has been determined using FTIR in palm oil [4], canola oil [3]; sunflower, olive, rapeseed and safflower oil [5]. Thus, this paper focuses on the development method to determine the peroxide value in VCO using FTIR with attenuated total reflectance (ATR) in conjunction with partial least square (PLS) statistical analysis.…”

Composition and characteristics of oil extracted from flaxseed-added corn tortilla

“…It was reported that flaxseed oil had a PV value of 0.24 (Jaswir, Kitts, Che Man, & Hassan, 2005), which was lower than those determined in the commercial oils, such as olive (3.37), castor (0.46), and soybean oil (0.5) (Miyasawa, Fujimoto, Kinoshita, & Usuki, 1994;Moh & Stang, 1999;Vekiari, Papadopoulou, & Kiritsakis, 2007), which reflects the low PV value in the flaxseed-added tortilla. The low PV value is an additional characteristic of the flaxseed-added tortilla, because it can be stored for a longer time with no rancidity problems and with soft texture.…”

Free Fatty Acids Separation From Malaysian High Free Fatty Acid Crude Palm Oil Using Molecular Distillation

“…The high level of FFAs in CPO indicates its lower ability due to the enzymeic and microbial lipase reactions of palm fruit, as well as the storage of CPO under bad conditions such as high temperature and high moisture which can affect the quality of oil [9,10]. The most commonly used methods for FFA separation are molecular distillation, chemical esterification, supercritical extraction, and organic solvent nanofiltration [11,12].…”