High-precision identification of the actual storage periods of edible oil by FT-NIR spectroscopy combined with chemometric methods

Abstract

<p>The actual storage period of edible oil is one of the important indicators of edible oil quality.</p>

Determination of acid value during edible oil storage using a portable NIR spectroscopy system combined with variable selection algorithms based on an MPA‐based strategy

“…In this study, the quantitative models of four variable selection methods based on the MPA strategy, i.e., CARS, VISSA, IVSO and BOSS, were compared and selected to highlight the superiority of variable selection methods and to further assess the potential of the portable NIR spectroscopy system developed by the team for predicting the acid value in edible oil. However, due to the randomness of the sampling strategies, all the methods were run 50 times to assess stability, the number of selected variables (nVAR), RMSECV, RMSEP, R 2 P and RPD were also recorded, and the statistical results are illustrated in Table 3. Furthermore, the results indicated that four variable selection methods satisfy the prediction accuracy.…”

“…1 However, it is susceptible to hydrolysis and oxidation reactions caused by light, oxygen, microorganisms, and enzymes in the storage process, resulting in free fatty acids and rancidity. 2 With the frequent occurrence of food safety problems in recent years, people have become increasingly concerned about the quality and safety of edible oils. More attention should therefore be given to the rapid detection of edible oil quality during the storage period to improve standards for consumers and to control stored oil quality in enterprises.…”

A hybrid variable selection method combining Fisher's linear discriminant combined population analysis and an improved binary cuckoo search algorithm

“…32 Then, the standard normal variate (SNV) method was used to correct the spectra, eliminating offset and amplitude differences and improving the comparability of spectra among different samples. 33 The samples were divided into a calibration set and a test set in a ratio of 3 to 1 by the Kennard–Stone (KS) method. The calibration set is used to establish the calibration model, and the test set is used to evaluate the performance of the model.…”

Rapid Detection of Fatty Acids in Edible Oils Using Vis-NIR Reflectance Spectroscopy with Multivariate Methods

“…Some studies have been conducted to precisely measure the content of fatty acids for quality assessment of oil products in recent years [7]. Gas chromatography was the preferred analytical method for the determination of fatty acid methyl esters (FAMEs) [8][9][10].…”