Screening and Empirical Kinetic Models of Collagen Extraction from Selected Malaysian Freshwater Fish

Abstract

ABSTRACTAcid‐soluble collagen (ASC) and pepsin‐soluble collagen (PSC) were extracted from the muscles of selected cultured catfish (hybrid of Clarias gariepinus x Clarias macrocephalus), red tilapia (Oreochromis niloticus), black tilapia (Oreochromis mossambicus), pangasius catfish (Pangasius sutchi), sultan fish (Leptobarbus hoevenii) and labyrinth fish (Trichogaster trichopterus), freshwater fishes that are widely consumed in Malaysia. The extracted yields for the tested species were higher for PSC as compared with ASC. The catfish contained the highest amount of collagen (PSC) at 368.36 ± 12.05 mg collagen/g muscles. A mathematical description of the principle kinetics involved in collagen extraction was attained using four two‐parametric models, namely the power law, parabolic diffusion, Peleg's and Elovich's models. The power law model was found to be the best model capable of predicting the extraction data with R2 = 0.993, P value = 0.033% and root mean square deviation = 2.605%, respectively.PRACTICAL APPLICATIONSUtilization of fish collagen has been favorable over that of mammalian sources, mainly in making more effective use of underutilized resources. The application of acid‐extraction technology to recover and isolate collagen from Malaysian freshwater fish muscles would be able to boost up the commercial values of these cheap and underutilized protein sources while assisting in conservation of these natural resources in Malaysia. Mathematic models proposed in this study were also proven to be successful in governing and describing the kinetics of collagen extraction process.