Abstract
Alginate-chitosan (Alg-CH) coated multiple water-in-oil-in-water (W/O/W) nanoemulsion loaded with sesamol and retinol was hypothesized to enhance the oxidative stability of margarine. Total phenol content (TPC), antioxidant activity, acid value (AV), peroxide value (PV), para-anisidine value (pAV), induction period (IP), and residual values of sesamol and retinol by HPLC were determined for 90 days. Margarine with tert-butylhydroquinone (TBHQ) (T3) had the higher TPC and antioxidant activity (8.05 mg gallic acid equivalent (GAE)/g), 53.1 %) than T1 (nanoemulsion, 7.39 mg GAE/g, 38.95 %), T2 (free-sesamol and -retinol, 6.98 mg GAE/g, 31.07 %), and T4 (no antioxidant, 6.46 mg GAE/g, and 14.45 %) while T1 had higher antioxidant activity and TPC than T2 and T4 after 90 days. On day 90, the highest residual values of sesamol (200.10 mg/100 g) and retinol (118.09 μg/100 g) obtained for T1. Overall, T1 contributed to the prolonged oxidative stability of margarine, potentially offering an alternative to synthetic antioxidants.
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