ВЛИЈАНИЕ НА АМБАЛАЖНИОТ МАТЕРИЈАЛ ВРЗ КВАЛИТЕТОТ И БЕЗБЕДНОСТА НА ПРЕХРАНБЕНИТЕ ПРОИЗВОДИ INFLUENCE OF PACKAGING MATERIAL ON QUALITY AND SAFETY OF FOOD PRODUCTS
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Abstract
Polyethylene terephthalate (PET) is the main packaging material for many food products, particularly carbonated beverages and bottled water. The strength and permeability properties of PET are very good for packaging of beverages, its resistance to chemicals is high and it has a high degree of transparency. Acetaldehyde and formaldehyde are formed during the thermoforming of PET containers. After cooling, acetaldehyde and formaldehyde remain trapped in the walls of a PET bottle and may migrate into the water after filling and storage. Taking into consideration all this, the objective of this investigation is determination the concentration of acetaldehyde and formaldehyde in PET containers of different volumes, made by various manufacturers of bottled mineral carbonated and noncarbonated water, and exposed to different temperatures. The migration of acetaldehyde and formaldehyde from PET bottles into mineral carbonated and noncarbonated water was determined by high performance liquid chromatography. Taking into consideration that formaldehyde and acetaldehyde have no UV active or fluorescent group, the chromatography was preceded by derivatization in a closed system (due to a low boiling point of acetaldehyde and formaldehyde), which transforms carbonyl compounds into UV active compounds.
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