Oxygen permeance: a method applied to modified atmosphere packages containing fresh plant foods

The ambient oxygen ingress rate method (AOIR) is an alternative method to OxTran for measuring the oxygen transmission rates (OTR) of whole packages. The objective of the present work was (a) to compare OTR values obtained by the two methods, and (b) to evaluate the use of the AOIR method for measuring OTR at realistic food storage temperatures and humidity levels. The AOIR method gave equal OTR values compared to the Ox-Tran method for the ®ve different types of whole packages used in the experiment, with OTR values in the range 0.06±1.48 ml O 2 /day. The repeatability of the AOIR method measured on an HDPE bottle was AE2.6% of the measured value in this experiment. This is slightly higher than the general speci®cations of the Ox-Tran method (1% of reading for packages). However, the AOIR method can be considered to be a reliable, precise and cheap alternative method to the Ox-Tran method for measuring OTR of whole packages. The capacity of the method is also high. The AOIR method showed satisfactory results when comparing OTR for packages tested under realistic food storage conditions covering 23°C/50% relative humidity (RH) and at 4°C/60% RH on the outside, combined with water (100% RH) or dry air inside the packages.

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Ambient oxygen ingress rate method—an alternative method to Ox‐Tran for measuring oxygen transmission rate of whole packages

Larsen¹,

Köhler²,

Magnus³

2000

Packag Technol Sci

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Predicting changes in oxygen concentration in the headspace of nitrogen flushed packages by the ambient oxygen ingress rate method

Larsen¹,

Köhler²,

Magnus³

2002

Packag Technol Sci

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The ambient oxygen ingress rate (AOIR) method is an alternative/supplementary method to Ox-Tran for measuring the oxygen transmission rates of packages. The AOIR method facilitates high-capacity testing of packages under realistic food storage conditions, on the one hand, and on the other hand provides the possibility to predict the oxygen concentration over time in packages¯ushed with nitrogen at the time of packaging. The predicted oxygen concentration values showed good agreement with experimental values for¯exible packages stored over a period of 91 days at 23°C and 38°C. The prediction of the oxygen concentration in nitrogen-¯ushed packages may be a useful tool, e.g. in shelf life studies, in the selection of the optimal food package as regards to oxygen protection and within quality control purposes.

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Simple universal permeation apparatus

2003

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A number of methods and commercial apparatuses for measuring the permeability of polymeric films and sheet materials have been successfully developed. Generally, the equipment is complex, expensive and specific to certain permeants, but all operate on similar basic principles. Because of our interest in a wide range of permeants, including fixed gases and organic vapours, we have built an inexpensive apparatus that can measure permeation to gas, moisture and organic vapours. We also require outputs that can provide not only permeability data but also proved solubility and diffusion coefficients. The apparatus is built around a commercially available thermal conductivity detector.

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Oxygen permeance: a method applied to modified atmosphere packages containing fresh plant foods

Cited by 9 publications

References 7 publications

Ambient oxygen ingress rate method—an alternative method to Ox‐Tran for measuring oxygen transmission rate of whole packages

Ambient oxygen ingress rate method—an alternative method to Ox‐Tran for measuring oxygen transmission rate of whole packages

Predicting changes in oxygen concentration in the headspace of nitrogen flushed packages by the ambient oxygen ingress rate method

Simple universal permeation apparatus

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