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Influence of PET bottle weight, closure performance and filling Technique on the oxygen content of soya cooking oil

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The use of PET bottles for edible oil in Brazil is increasing but there is a trend to reduce bottle weight for economic reasons, which decreases the oxygen barrier of the package. The barrier performance of a 20 g PET bottle for 900 ml soya oil, submitted to gas flushing with gaseous N2 and pressurization with liquid N2, was compared with a 27 g PET conventional bottle. During 8 months storage at 25°C the internal pressure, dissolved oxygen and oxygen in the headspace were evaluated and did not change significantly. Liquid N2 pressurization did not improve the efficiency of reducing O2 in the headspace compared to N2 gas flushing. Copyright © 2001 John Wiley & Sons, Ltd.
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Keywords: PET bottles; dissolved oxygen; headspace oxygen; oxygen barrier; soya oil

Document Type: Research Article

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Publication date: 01 September 2001

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