Two Convenient Methods for Detection of Non-Dairy Fats in Butter by Dynamic Light Scattering and Luminescence Spectroscopy

Abstract

We propose two convenient methods to quickly detect the presence of non-milk fat (palm oil) in butter, as well as to determine its amount in the product. For the first time, we have experimentally obtained the dependence of the size of drops of an alcoholic emulsion of oil or spread on the content of palm oil in it by the dynamic light scattering (DLS) method. We have also obtained the dependence of intensity ratio of the components of spread luminescence spectrum on palm oil content when excited at a wavelength λ = 266 nm. These results allowed us to propose two methods for determining the adulteration of butter with palm oil using DLS and measuring luminescence spectra. The two methods are physically independent but successfully supplement each other. DLS and luminescent methods for determining the proportion of palm oil give errors of no more than 10% and 6%, respectively.

Polysaccharide Composite Alginate–Pectin Hydrogels as a Basis for Developing Wound Healing Materials

“…In Figure 5, it can be seen that the Raman spectrum of pectin and, consequently, of the mixture, is situated on the luminescence mount, whose spectrum is well described by two Gaussians, similar to the approach used to describe the luminescence of milk fats and proteins in [41,42]:…”

“…In Figure 5 , it can be seen that the Raman spectrum of pectin and, consequently, of the mixture, is situated on the luminescence mount, whose spectrum is well described by two Gaussians, similar to the approach used to describe the luminescence of milk fats and proteins in [ 41 , 42 ]: where = 40,981, = 36,967, = 881.9 cm −1 , = 1323 cm −1 , = 235.4 cm −1 , = 1323.1 cm −1 . The background luminescence of the mixture is 1.6 times weaker.…”

Determination of the Dependences of the Nutritional Value of Corn Silage and Photoluminescent Properties

“…According to the conducted literature review, the photoluminescence of the visible range demonstrates its effectiveness in terms of detecting okadaic acid (OA), a marine biotoxin produced by microalgae that poses a significant threat to mariculture, seafood safety, and human health. The results of processing experimental data showed that the reliability of detection using luminescence is confirmed by a coefficient of variation of 2.54% when employing alternative methods [10].…”