Physicochemical and textural properties of dried squid as affected by alkaline treatments

The effect of alkaline treatment on the physicochemical and textural proper ties of dried squid was investigated. Dried squid soaked in 0.15 mol kg(-1) sodium carbonate with a squid/alkaline solution ratio of 1:10 (w/v) for 20 h was shown to be the most acceptable in terms of both appearance and text ural properties. Sodium hydroxide appeared to extensively destroy the fibre structure, leading to a mushy texture of dried squid. Alkaline-treated squ id had increased moisture and ash contents but decreased shear force compar ed to dried squid. Alkaline treatment effectively disrupted various bonds s tabilising the fibre structure, resulting in structural alteration and incr eased water absorption. Scanning electron microscopy (SEM) showed that alka line treatment mainly contributed to swelling and disintegration of squid m uscle fibre. As a result, dried squid acquired a softened texture with a hi gher water-holding capacity. (C) 2000 Society of Chemical Industry.