title: Color Changes of UHT Milk During Storage.
abstract: In this study measurements of color parameters of UHT milk were performed, by using a MOM-color 100 photoelectric tristimulus colorimeter. Colors of UHT milk samples containing 3.2% and 1.6% milk fat, processed under industrial conditions, packed in polyethylene terephtalate (PET) based packages, and stored for 0, 15, 30, 45, 60 and 90 days at ambient temperature (20±5°C) were examined. Results are shown in four different systems that define measurement of color parameters expressed in: CIE, CIE L*a*b*, Hünter and ANLAB - Adams Nickerson systems. Average value of mean reflectance of UHT milk determined in CIE system statistically is highly significantly changed, (p < 0.01) depending on duration of storaging, percentage of milk fat, as well as on the interaction of the mentioned factors. For the UHT milk with 1.6% milk fat statistically significant (p < 0.05) decrease of psychometric chroma b* occurs after 60 days, and for milk with 3.2% milk fat established on 45thday of storage.
authors.affiliation: University of Belgrade, Faculty of Agriculture, Belgrade, Nemanjina 6, Serbia. jpopov@agrifaculty.bg.ac.yu.
authors.forename: Jovanka V
authors.initials: JV
authors.lastname: Popov-Raljić
authors.affiliation: University of Belgrade, Faculty of Agriculture, Belgrade, Nemanjina 6, Serbia. nlakic@agrifaculty.bg.ac.yu.
authors.forename: Nada S
authors.initials: NS
authors.lastname: Lakić
authors.affiliation: University of Belgrade, Faculty of Agriculture, Belgrade, Nemanjina 6, Serbia. jovankal@agrifaculty.bg.ac.yu.
authors.forename: Jovanka G
authors.initials: JG
authors.lastname: Laličić-Petronijević
authors.affiliation: University of Belgrade, Faculty of Agriculture, Belgrade, Nemanjina 6, Serbia. baracm@agrifaculty.bg.ac.yu.
authors.forename: Miroljub B
authors.initials: MB
authors.lastname: Barać
authors.affiliation: High Technical School of Vocational Studies, Pozarevac, Nemanjina 2, Serbia. visnja.sikimic@gmail.com.
authors.forename: Višnja M
authors.initials: VM
authors.lastname: Sikimić
keywords: UHT milk; color measurement; milk fat content; storage