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Consumer demand for high quality food products has driven the packaging industry to look for new solutions to enhance food safety. In packaged food products, seal integrity is essential to the physical, chemical and biological quality of the packaged product as seal integrity failure will not only compromise product safety and containment, but also significantly reduce shelf-life. Intelligent packaging integrated with O2 sensors are capable of monitoring packaging process efficiency, integrity and improving food safety by facilitating enhanced surveillance of packaged food products throughout the food supply chain, whilst being contactless and non-destructive, economical, fast, reliable and versatile over a wide range of environmental and processing conditions. Numerous commercial technologies now exist to both control O2 within product packages and monitor O2 levels within food and beverage packs. Although there are many O2 sensing dyes and materials reported in the scientific literature, only a limited number have been used in food packaging applications. This chapter will summarise the applications of different phosphorescent O2 sensors used to non-destructively monitor O2 in packaged food and beverage products.

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