Proximate Composition, Minerals and Sensory Acceptability of Deep Fried Nile Tilapia Fish (Oreochromis niloticus) as Influenced by Repeated Use of Palm Oil

Abstract

Background: Fish fryer adapted reusing of frying oil to minimize cost and health problems are reported on reusing of frying oil. This study was aimed to determine Chemical and sensory properties of deep fried Nile tilapia fish (oreochromis niloticus) as influenced by repeated use of palm oil.Method: Preliminary survey was conducted as baseline for the experiment. Data were collected for cooperative unions who work in fish market or informally known as (Gudumale Park, Fikir hayik and Tikur wuha). The experiment was designed and conducted using data collected from unions and proximate composition, Minerals (Ca, P, Fe and Zn) and sensory acceptability were analyzed. SPSS for windows version 20 and SAS for windows version 9 were used for analysis.Result: Preliminary survey showed fried fish consumption and repeatedly using of palm oil for frying is accustomed practice around the lake. Proximate composition indicates as frying cycle increases ash and crude fat were increased while protein and moisture were decreased. However, total carbohydrate was not significantly different. As frying cycle increases Ca, P, Fe and Zn were decreased. In case of sensory properties color and appearance of fried fish from cycle 1 to cycle 3 had better preference. However, the rest cycle had lower color and appearance acceptability. Similarly, odor of fried fish from cycle 1 to cycle 4 had better preference as compared to cycle 5 and cycle 6.Conclusion: Thus it can be concluded that repeatedly using of palm oil has effect on proximate composition, Minerals (Ca, P, Fe and Zn) and sensory acceptability deep frying of Nile tilapia fish due to deteriorated frying palm oil has drawn in to frying fish as the moisture is evaporated and this could be harmful to human health. Therefore frequent replacing of oil could be better.

Keywords: Chemical, Sensory properties, Palm oil, Lake side Hawassa

DOI: 10.7176/FSQM/95-03

Publication date:March 31^st 2020