2. Materials and methods
2.1. Sampling
Vietnamese sutchi catfish (P. hypophthalmus) fillets of
different size (170–260 g), boneless and skinless, were purchased,
either frozen or thawed, in different Italian markets
and supermarkets. Frozen fillets had 15–20% glazing
declared on the label, together with the name of the trading
company, lot number and expiry date of the product.