VARIATION OF VITAMINS AND MINERALS IN FOUR TYPES OF PACKAGING DURING SHELF LIFE OF PASTEURISED EGGS.

The aim of the study was to evaluate the changes in the values of minerals and vitamins in pasteurised egg mass in comparison between traditional types of packaging and biodegradable packaging during the storage period with temperature of 0 °C + 6 °C. The containment function of packaging contributes to protecting the environment from the products and the products from the environment. This research analyses the properties and reflects the comparison between four types of packaging: high-density polyethene (HDPE), Polyethylene terephthalate (PET), Doypack (stand-up pouches, DP) and Tetra Rex® Bio-based packaging (TP). The analysis focuses on the impact that different types of packaging have on the shelf-life, vitamins, and minerals during the storage period of the product. The final product was packaged using four previously mentioned packaging technologies - 50 units of samples for each packaging. The changes in quality of samples during storage were represented by measuring Colony-forming units (CFU⋅g-1) using LVS ISO 4833-1:2014 method. Minerals were represented by measuring percentages using LVS EN 14082:2003 method, and vitamins data were compliant with the PN-EN ISO/IEC 17025 standard of laboratory J.S. HAMILTON POLAND Sp. z o.o. During the study, it was concluded that there was no deviation in minerals in each type of packaging. However, there was a significant variation for mineral Calcium (Ca) in HDPE, PET, and DP packaging -- from 2.83 to 3.13% on average. On the other hand, the amount of mineral Calcium (Ca) in the TP packaging remained unchanged. As for the other vitamins, changes were notable in PET and DP packaging types -- 11% and 12% on average, respectively. The HDPE and TP packaging disparities were less noticeable, no more than 1% on average. The obtained data emphasises the importance of the packaging type, which could provide stable quality of ready to use products for up to thirty five days, preserving valuable components. [ABSTRACT FROM AUTHOR]