Abstract
Physical properties of gelatin extracted from Unicorn leatherjacket (Aluterus monoceros) skin, which is generated as a waste from fish processing industries, were optimised using Response Surface Methodology (RSM). A Box-Behnken design was used to study the combined effects of three independent variables, namely phosphoric acid (H3PO4) concentration (0.15–0.25 M), extraction temperature (40–50 °C) and extraction time (4–12 h) on different responses like yield, gel strength and melting point of gelatin. The optimum conditions derived by RSM for the yield (10.58%) were 0.2 M H3PO4 for 9.01 h of extraction time and hot water extraction of 45.83 °C. The maximum achieved gel strength and melting point was 138.54 g and 22.61 °C respectively. Extraction time was found to be most influencing variable and had a positive coefficient on yield and negative coefficient on gel strength and melting point. The results indicated that Unicorn leatherjacket skins can be a source of gelatin having mild gel strength and melting point.
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The authors thank Dr. W.S. Lakra, Director of Central Institute of Fisheries Education for providing all the facilities for this work.
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Hanjabam, M.D., Kannaiyan, S.K., Kamei, G. et al. Optimisation of gelatin extraction from Unicorn leatherjacket (Aluterus monoceros) skin waste: response surface approach. J Food Sci Technol 52, 976–983 (2015). https://doi.org/10.1007/s13197-013-1075-y
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DOI: https://doi.org/10.1007/s13197-013-1075-y