The headspace O2 compositionwas measured using a Dansensor CheckMate 9900 gas space analyser (PBI Dansensor, Ringsted, Denmark) after 4, 8, 12, 16 and 24 h of pouch sealing to determine the time required for the oxygen absorber to reduce the oxygen concentration inside the pouch to below 0.01%. Headspace ethanol was determined by gas chromatography using an HP5890 GC equipped with a FID.