The effect of processing conditions on the gel strength of whitecheek shark (Carcharhinus dussumieri) skin gelatin

To establish the optimum conditions for extracting gelatin from whitecheek shark (Carcharhinus dussumieri (skin, response surface methodology (RSM) was adopted. The effects of concentration of NaOH (0.01-1 N) (X1), concentration of HCl (0.01-1 N) (X2) and extraction time (3-8 h) (X3) on the gel strength, were studied using central composite design (α= 1.682). Based on the results, shark skin gelatin gel strength on different extraction conditions, were within 54.5-1075 g. The results showed that the concentration of NaOH and HCl had significant effect on gel strength (P≤0.05) but the extraction time had no significant effect on this property.