The current work used fingerprinting-kinetics for the first time to monitor shelf-life changes in a low-pH,
pasteurised, shelf-stable product, more particular in orange juice. Orange juice sampleswere stored as a function
of time at four different storage temperatures (20, 28, 35 and 42 °C). To obtain insight into chemical changes in
the volatile food fraction, samples were fingerprinted with headspace GC–MS. The objectives of this work were
twofold: (i) to identify major chemical changes of pasteurised orange juice during shelf-life and (ii) to study the
kinetics of selected shelf-life compounds in the context of accelerated shelf-life testing (ASLT). At 20 °C, changes
in terpenes and a decrease in aldehydeswere observed. Oxides and sulphur compounds increased and esters decreased
at increased storage temperatures (at 28 °C and above). Concerning ASLT, four volatile compounds had
clear temperature and time dependent kinetics within the investigated temperature range.
The current work used fingerprinting-kinetics for the first time to monitor shelf-life changes in a low-pH,pasteurised, shelf-stable product, more particular in orange juice. Orange juice sampleswere stored as a functionof time at four different storage temperatures (20, 28, 35 and 42 °C). To obtain insight into chemical changes inthe volatile food fraction, samples were fingerprinted with headspace GC–MS. The objectives of this work weretwofold: (i) to identify major chemical changes of pasteurised orange juice during shelf-life and (ii) to study thekinetics of selected shelf-life compounds in the context of accelerated shelf-life testing (ASLT). At 20 °C, changesin terpenes and a decrease in aldehydeswere observed. Oxides and sulphur compounds increased and esters decreasedat increased storage temperatures (at 28 °C and above). Concerning ASLT, four volatile compounds hadclear temperature and time dependent kinetics within the investigated temperature range.
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