Influence of Modified Atmosphere Packaging on Postharvest Quality of Baby Spinach (Spinacia oleracea L.) Leaves

The aim of the current study was to determine the influence of modified atmospheric pressure on the quality of baby spinach during storage. Treatments consisted of control [(normal air) (78% N-2; 21% O-2)], modified atmosphere (MA) (5% O-2; 15% CO2; balance N-2), storage temperature (4, 10, and 20 degrees C), and number of days after storage (0, 3, 6, 9, and 12). Parameters recorded are gas composition, weight loss, sensory quality, minerals and trace elements (Mg, Fe, and Zn), flavonoids, and antioxidant activity. The results of this study demonstrated that in the headspace gas there was overall reduction in O-2 and increase in CO2 levels over the storage period. After 6 days of storage, all samples in normal air irrespective of the storage temperature were found to fall short of acceptable marketability with regard to visual appearance. The total antioxidant activity and flavonoids were well maintained under controlled atmosphere (CA) at 4 degrees C when stored for 9 days.