shows the results obtained for metabisulphite/citric acid
(0.60/0.06 g/m2), green tea extract, cinnamon extract and purple
carrot extract. Metabisulphite/citric acid (0.60/0.06 g/m2) gave similar results to blank samples after 4 days. After 8 days, cinnamon
extract and green tea extract gave slightly better results than blank
samples; but not as good results as metabisulphite test pouches.
The antioxidant effect of green tea extract combined with vitamin E
or cinnamon essential oil respectively was measured after 8 days.