Efektivitas jenis adsorben pada pemurnian bertingkat minyak mata tuna kaya DHA Effectiveness of adsorbent type on graded purification of DHA-rich tuna eye oil
Abstract
Docosahexaenoic acid (DHA), an omega-3 fatty acid in fish oil, plays a crucial role in brain and retina development. Despite the importance of DHA-rich fish oil, mass production remains limited in Indonesia. However, tuna eye, an industrial by-product, shows promise as a potential source of eicosapentaenoic acid (EPA) and DHA. Notably, high DHA and polyunsaturated fatty acid PUFA in tuna eye oil are prone to oxidation. To address this, double purification (neutralization, bleaching) using different adsorbents (activated alumina, activated charcoal, magnesol XL) reduces oxidation, meeting oil standards. This research aims to determine the best purification treatment through the quality parameters of fish oil to produce tuna eye oil with maximum impurity reduction. The fish oil was obtained by centrifugation process, then it was purified with several treatment level namely, neutralization (N1), neutralization, bleaching (N1B1), neutralization, bleaching, neutralization (N1B1N2), and neutralization, bleaching, neutralization, bleaching (N1B1N2B2). Several types for adsorbent was used for purification process namely 8% activated alumina, 10% activated charcoal, and 5% magnesol XL. Parameters examined include free fatty acids (FFA), acid number, peroxide value, anisidin, and total oxidation (TOTOX). The best treatment resulted was the purification level of N1B1N2B2 with 5% magnesol XL adsorbent. The results indicate significant effects (p<0.05) of adsorbents and extraction levels on oxidation numbers (peroxide, anisidine, free fatty acid and acid value. The refining process yields oil with reduced oxidation parameters, though exceeding the standard, it lowers impurities by 50-80% of initial values.
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