2.2.1. Sample preparation
Apples were peeled, cored (20 mm diameter stainless steel core borer) and sliced. Wedges (≈10 g) were immersed for 2 min in 6 g 100 mL−1 w/v commercial browning inhibitor Natureseal® AS1 (Agricoat Ltd., Great Shelford, UK), drained on sieve for 2 min and subsequently vacuum packed.