Shelf life modeling of photosensitive food: the case of colored beverages.
A new approach to shelf life modeling of photosensitive foods was developed taking into consideration the example of a saffron-containing yellow beverage highly prone to oxidative photobleaching. The beverage was exposed to different light levels at increasing temperatures. During exposure, samples were analyzed for bleaching rate, pigment content, and pigment degradation products. The results obtained clearly showed that shelf life testing of light-sensitive foods must take into proper account the effect of light. In addition, for these foods, shelf life models based on the sole accelerating effect of temperature may be misleading. By contrast, the concomitant exploitation of the accelerating effects of both light and temperature was used to develop and validate a simple model correctly predicting the shelf life of the beverage under actual storage conditions. The methodology proposed may allow solving of the difficult task of predicting shelf life of photosensitive foods usually marketed in the presence of light.
Dipartimento di Scienze degli Alimenti, Università di Udine, via Sondrio 2, 33100 Udine, Italy. lara.manzocco@uniud.it
Lara
L
Manzocco
Giuditta
G
Kravina
Sonia
S
Calligaris
Maria Cristina
MC
Nicoli
D001628:Beverages / Q000032:analysis / Q000528:radiation effects*; D004396:Coloring Agents / Q000032:analysis / Q000378:metabolism; D005511:Food Handling; D008954:Models, Biological; D038761:Photobleaching; D012044:Regression Analysis; D013057:Spectrum Analysis; D013696:Temperature
D004396:Coloring Agents