Gas Barrier Packaging Oxygen Scavengers

Various materials have been used to avoid damage to packaged commodities and, in some cases, the package by atmospheric oxygen. An obvious example, as mentioned previously, is the use of UV protective agents in the protection of vitamin C containing drinks. 

The European Commission provides in Synoptic Document No.7 [1] published in 1990, a provisional list of additives that can be used for the production of food 

This new collection of additives used in plastics for food contact [2] can be seen as a logical supplement to the earlier collection of monomers and other starting materials. That earlier collection was described in two handbooks entitled Spectra for the Identification of Additives in Food Packaging [3] and Spectra for the Identification of Monomers in Food Packaging [4]. These books presented information on monomeric substances listed in Directive 90/128/EEC and its amendments which restrict the range of monomers and other starting substances that can be used for the production of plastic materials and articles intended for food contact applications. 

GC chromatographic retention times were recorded to facilitate identification by retention index data. Chromatographic methods were used to indicate the presence of any impurities in the commercial chemicals. Samples of the reference substances are available on request and the collection of spectra and other information will be made available in printed format and on-line through the Internet. Van Lierop and co-workers [5] give an overview of the work done to establish the reference collection and the spectral atlas, which together will assist enforcement laboratories in the characterisation of plastics and the selection of analytical methods for additives that may migrate. 

Synoptic Document No.7, Draft of provisional list of monomers and 

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