TY - JOUR
T1 - Volatile compounds of modified atmosphere packaged cut iceberg lettuce
T2 - effect of extremely low O2, season, cultivar and storage time
AU - Deza Durand, Karla Michelle
AU - Petersen, Mikael Agerlin
PY - 2014/8
Y1 - 2014/8
N2 - This study investigates the changes in volatile compounds in minimally processed iceberg lettuce as a function of season, cultivar, packaging and time. In order to achieve this, iceberg lettuce cultivars Platinas, Diamantinas and Morinas were harvested from June to September 2009. Lettuces were minimally processed and stored under three different treatments: two passive modified atmosphere packagings using films of different permeabilities, F1 (OPALEN 65 AF) and F2 (OPP/PE-L 2040 AF), and storage in air. All packages were stored at 5°C. Gas composition and volatile compounds were assessed at 1, 5, 8 and 11days of storage in packaged lettuce, whereas in air stored samples volatiles were analyzed only at 1 and 5days of storage. Twenty one potent odorants were identified by GC-O. Among the months, August presented a notary increase of elemene, β-selinene and 2,3-butanedione, which likely contribute to off-odor of packaged cut lettuce. The content of O2 and CO2 was demonstrated to influence the formation of odorants as storage time increased. Higher amount of cis-3-hexenol was related to aerobic conditions found in the modified atmosphere packages and air stored samples after 1day of storage, whereas levels of odorants such as 2,3-butanedione, elemene and β-selinene were significantly enhanced under anaerobic conditions after 11days of storage. Film F2 seems to be the most promising because it kept the concentration of elemene and β-selinene lower than film F1. No clear differences were seen between the cultivars Morinas, Diamantinas and Platinas with regard to production of objectionable odorants under anaerobic conditions.
AB - This study investigates the changes in volatile compounds in minimally processed iceberg lettuce as a function of season, cultivar, packaging and time. In order to achieve this, iceberg lettuce cultivars Platinas, Diamantinas and Morinas were harvested from June to September 2009. Lettuces were minimally processed and stored under three different treatments: two passive modified atmosphere packagings using films of different permeabilities, F1 (OPALEN 65 AF) and F2 (OPP/PE-L 2040 AF), and storage in air. All packages were stored at 5°C. Gas composition and volatile compounds were assessed at 1, 5, 8 and 11days of storage in packaged lettuce, whereas in air stored samples volatiles were analyzed only at 1 and 5days of storage. Twenty one potent odorants were identified by GC-O. Among the months, August presented a notary increase of elemene, β-selinene and 2,3-butanedione, which likely contribute to off-odor of packaged cut lettuce. The content of O2 and CO2 was demonstrated to influence the formation of odorants as storage time increased. Higher amount of cis-3-hexenol was related to aerobic conditions found in the modified atmosphere packages and air stored samples after 1day of storage, whereas levels of odorants such as 2,3-butanedione, elemene and β-selinene were significantly enhanced under anaerobic conditions after 11days of storage. Film F2 seems to be the most promising because it kept the concentration of elemene and β-selinene lower than film F1. No clear differences were seen between the cultivars Morinas, Diamantinas and Platinas with regard to production of objectionable odorants under anaerobic conditions.
U2 - 10.1016/j.foodres.2014.02.017
DO - 10.1016/j.foodres.2014.02.017
M3 - Journal article
SN - 0963-9969
VL - 62
SP - 254
EP - 261
JO - Food Research International
JF - Food Research International
ER -