Indirectly processed UHT milk was packaged in IntaseptTMaseptic pouches with(treatment) or without (control) oxygen-scavenging film and stored for 14 weeks at26 ± 0.3°C.
Samples were analysed at 0, 4, 8 and 14 weeks for dissolved oxygen,stale flavour volatiles (methyl ketones and aldehydes) and free fatty acids.Discriminative subjective analysis of odour by a consumer panel was alsoconducted.
The oxygen-scavenging film was shown to significantly (p < 0.05) reducedissolved oxygen content by 23–28% during storage.
Significant reductions of23–41% were also observed for some stale flavour volatiles, including three methylketones and two aldehydes.
Free fatty acid levels remained far below thresholdvalues, indicating that lipolytic rancidity would not interfere with the subjectiveanalysis.
However, the consumer panel failed to detect a significant difference inodour between the treatment and control samples. Copyright © 2006 John Wiley &Sons, Ltd.