Open AccessPhoto-oxidation of Pasteurized Milk in Polyethylene Pouch Packs
Author(s) -
Muhammad Nadeem,
Asif Anwar,
Rahman Ullah,
Ahmad Shakeel,
Masroor Ellahi Babar
Publication year - 2017
Publication title -
pakistan journal of scientific and industrial research. series b: biological sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.117
H-Index - 5
eISSN - 2223-2567
pISSN - 2221-6421
DOI - 10.52763/pjsir.biol.sci.60.1.2017.46.48
Subject(s) - pasteurization , food science , chemistry , lactose , polyethylene , light intensity , physics , organic chemistry , optics
In the present study photo-oxidative stability of pasteurized milk packaged in polyethylenepouches was investigated. Milk packaged in three layer polyethylene pouch packs was exposed to 400,600 and 800 l´ florescent light at 4 °C for 6 days, compared with a control (stored in dark). Light had apronounced effect on fat content of milk with no effect on protein, lactose and ash content. Photo-oxidativestability of milk decreased as the intensity of light increased, peroxide value, anisidine value and conjugateddienes increased during the storage period of 6 days, higher values were observed in samples exposed to800 l´ florescent light. After 6 days of storage period, milk exposed to 400 l´ florescent light did not revealany oxidized flavour. The results of this study depicted that polyethylene pouches have the capability toresist photo-oxidation up to 400 l´ light.