Comparative Analysis of UV Treatment and Heat Treatment on Fatty Acids Profile of Milk

Abstract

Background: Application of UV radiation for ensuring the safety and quality status of liquid foods is of growing interest of food industry, as thermal pasteurization produces the qualitative and safety concerns in terms of fat oxidation of milk. Milk is an important part of human diet because of its balanced nutritional composition.Methods: This study was planned to prevent the spoilage of milk because of fat oxidation and to ensure its quality and safety status towards human health by the application of UV. UV light does not promote the formation of free radicals thus it decreases the chances of fat oxidation and ultimately the formation of off flavored compounds. Eight different treatments were made in which milk was treated with one thermal treatment and to check whether the UV light treatment disturbs the fatty acid profile, six samples were treated with two different intensities and 3 different stay times.Results: Among the UV intensities, 1st Intensity (1780 µW/cm2) gives more good results than that of 2nd intensity (2300 µW/cm2). The average value of three different stay times of UV1st , UV2nd and heat treatment for Oleic acid (C18:1) are 16.74mg/g , 18.07 mg/g and 18.87 mg/g respectively, Similarly for linoleic acid (C:18:2 trans trans ) values are 0.15 mg/g , 0.19 mg/g and 1.45mg/g which shows that there is lesser amount of trans fatty acids after UV intensity 1st treatment than second UV intensity and heat. Physicochemical attributes of milk remain unchanged by UV application, minor changes occurred in fatty acids profile of milk, but those changes were negligible as compared to thermal treatment.Conclusions: Based on results it was concluded that thermal treatment considerably affects the physicochemical as well as the fatty acids profile of milk.

UV LED Light Efficiency in Aflatoxin M1 Reduction in Bovine Milk

“…On the other hand, when milk has its temperature increased and is stored, the carbohydrate present is degraded and converted into acids, which explains why the change in the titratable acidity value occurred. Also, since LED UV light could make environments and products free of contaminants, when applied to milk samples, it is possible that there was a decrease or not of microorganisms present, interfering with acidity (Mubeen et al, 2020).…”