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Effects of modified atmosphere packaging conditions on quality preservation of powdered infant formula
Author(s) -
An Duck Soon,
Wang Hong Jiang,
Jaisan Chalalai,
Lee Ji Hye,
Jo Min Gyeong,
Lee Dong Sun
Publication year - 2018
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.2372
Subject(s) - modified atmosphere , titratable acid , chemistry , food science , solubility , lipid oxidation , composition (language) , dissolution , infant formula , shelf life , antioxidant , organic chemistry , linguistics , philosophy
The effect of different modified atmospheres (100% N 2 , 100% CO 2 , 70% N 2 /30% CO 2 , 50% N 2 /50% CO 2 , and air) on the quality preservation of powdered infant formula was investigated by a storage test at 30°C. Metal can packages of 400 g per unit were stored for 493 days with periodic measurements of package gas composition and product quality attributes, which included peroxide value (POV), pH, titratable acidity, bifidobacteria count, hydroxymethylfurfural content, surface colour, and solubility. In the air package, POV as an oxidative quality index increased highly along with oxygen concentration decrease, reaching a maximum of 58.7 meq/kg lipid at 350 days. Compared with the air package, POV increase of the product was significantly lower, with all the O 2 ‐excluded modified atmosphere packages showing a maximum of 28.5 to 29.3 meq/kg at 350 days. Packages of high CO 2 concentration experienced a pH decrease and an acidity increase of the stored product caused by dissolution of CO 2 . The count of bifidobacteria in the product was maintained higher after 119 days in the package of 100% CO 2 than in the other packages. Hydroxymethylfurfural content showed a slight increase after an initial period of slight decrease, with little difference among the package treatments. There were no significant changes in product solubility and surface colour during storage. Considering that the high CO 2 atmosphere helps the survival of bifidobacteria and protects the product from oxidation without negative effects on the other quality attributes, it is suggested for use in packaging of powdered infant formula.