Sulphur dioxide was determined in the mushrooms that had
been stored in metabisulphite/citric acid (0.6/0.06 g/m2) test
pouches for 11 days, as it is explained in Section 2.3. No sulphur
dioxide was detected in the samples of mushrooms (n ¼ 3), what
means that either there was not sulphur dioxide in the samples,
or its concentration was below the detection limit of the method
(3.2 mg sulphur dioxide/g of mushrooms). According to the
Regulation 10/2011/EU, the specific migration limit for sulphites
incorporated into packaging material is 10 mg sulphur dioxide/g