Abstract
Gelatin, which is thermally converted from collagen, is widely utilized in the pharmaceutical industry as a raw material for hard and soft capsules. The aim of this study was to produce gelatin from yellowfin tuna skin, the by-product of tuna processing, and determine the optimal concentration for hard capsule production. Capsules were prepared from the skin gelatin. The tuna skin gelatin was characterized as follows: pH 6.0, gel strength 191 g Bloom, water content 7.01%, ash content 0.92, setting temperature 22.3 °C, and viscosity 12,700 cP. A 20% gelatin solution was found to be the best concentration among the concentrations examined for hard capsule production, and gave a body capsule height of 19.4 mm, cap capsule height of 12.8 mm, weight of 0.07 g, disintegration time of 4.09 min, pH of 5.92, and moisture content of 12.0%. The results suggest that tuna skin gelatin can be an excellent source of hard capsule material.
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Acknowledgements
This research was supported by the Ministry of Research, Technology, and Higher Education through competitive funding in joint research and publication (KLN). The authors would like to thank PT Kapsulindo Nusantara for kindly providing the apparatus related to capsule manufacturing and quality check, and also Dr. Sonja Kleinertz (DAAD Long Term Lecturer, IPB University, Indonesia) for the native English checking of the manuscript.
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Nurilmala, M., Adinugraha, S.C., Jacoeb, A.M. et al. Evaluation of the properties of tuna skin gelatin as a hard capsule material. Fish Sci 86, 917–924 (2020). https://doi.org/10.1007/s12562-020-01457-7
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DOI: https://doi.org/10.1007/s12562-020-01457-7