Abstract:

Perilla seed oil (PSO) powder was prepared by physical adsorption with cross-linked esterified porous starch
(CEPS) as the wall material. Several process conditions were optimized by one-factor-at-a-time and orthogonal array design
to achieve the highest embedding efficiency (EE). The optimum conditions for preparing PSO powder were established as
follows: embedding at 55 ℃ for 50 min with a PSO/ CEPS ratio of 4:1. PSO powder under the optimized conditions gave
rise to the highest EE of more than 30%. The peroxide values (POV) of PSO and the PSO powder under the optimized
conditions were determined under accelerated oxidation conditions. From the results obtained, we found that the lipid
oxidation time of the PSO powder was substantially prolonged in comparison with native PSO, indicating enhanced
oxidation resistance.

Key words: porous starch, perilla seed oil powder, ratio between core material and wall material, embedding rate, oxidation resistance