Physicochemical Properties of Milkfish Gelatin-Natural Starch Composite


  • Isriany Ismail Department of Pharmacy, Faculty of Medicine and Health Science, Universitas Islam Negeri Alauddin, Makassar, Indonesia; Department of Pharmaceutical Science, Faculty of Pharmacy, Universitas Hasanuddin, Makassar, Indonesia
  • M. Natsir Djide Department of Pharmacy, Faculty of Pharmacy, Universitas Hasanuddin, Makassar, Indonesia
  • Marianti A. Manggau Department of Pharmacy, Faculty of Pharmacy, Universitas Hasanuddin, Makassar, Indonesia
  • Latifah Rahman Department of Pharmacy, Faculty of Pharmacy, Universitas Hasanuddin, Makassar, Indonesia



Gelatin-starch composite, Gelatin modification, Milkfish gelatin


Halal gelatin sourced from fish can be improved in quality through mixing with other polymers so that it can be an alternative as food, pharmaceutical, and cosmetic ingredient. The purpose of this study was to determine the characteristics of milkfish scale gelatin after the formation of a composite with corn, potato, and cassava starch to be used as a pharmaceutical and food excipient.

The gelatin composite (FMG) of milkfish scales with corn, potato, and cassava starch (GM, GS, and GC) was made by casting method, using a ratio of gelatin and starch (4,5:0,5). Characteristic assessment includes organoleptic, viscosity, swelling index, FT-IR spectroscopy, and Calorimetry (DSC). Data analysis used a non-parametric One Way ANOVA statistical method (p<0.05).

The composites produced from mixing FMG with corn starch (GM), potato (GS) and cassava (GC) showed hygroscopic properties, increased viscosity values and decreased swelling index in GM (7.89 cP & 25.0%), GS (8 .36 cP & 21.0%), and GC (8.64 cP & 12.7%), compared to FMG (0.11 cP & 75%) at p < 0.05. The behavior of the composite FT-IR spectrum follows the FMG spectrum pattern with a shift in wavenumber in the typical bands (Amide A, Amide B, Amide I, Amide II, and Amide III) in the gelatin spectrum. There was a shift of Tg to higher values in GM and GS, Tm increased in GM and GC, and all composites showed a decrease in melting enthalpy.

The spectral pattern of the composite follows the typical spectral pattern of FMG. GM, GS, and GC composites showed increased viscosity, water retention, and thermal stability compared to FMG. GM and GS may be used as pharmaceutical and food excipients.



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How to Cite

Ismail I, Djide MN, Manggau MA, Rahman L. Physicochemical Properties of Milkfish Gelatin-Natural Starch Composite. Open Access Maced J Med Sci [Internet]. 2022 Apr. 1 [cited 2024 Mar. 5];10(A):540-7. Available from: