Optimization Peony Seed Oil Extraction Process at Suitable Temperature and Physicochemical Property Analysis

doi:10.7525/j.issn.1673-5102.2020.01.011

Abstract

Abstract: In order to improve the yield and the quality of peony seed oil extraction process, and provide technical and theoretical basis for further exploring the feasibility of peony seed oil cold pressing, we applied box-behnken experimental design to optimize the peony seed oil extraction process at suitable temperature. The fitting degree of the model was high and the experimental error was small. Finally, the optimums of peony seed oil in extraction process at suitable temperature were the pressure 4.6 MPa, feed rate 1 600 g·min^-1, temperature 73℃, and moisture content 4.6%. The maximum oil yield and residual oil rate were 23% and 7.02%, respectively. The unsaturated fatty acid content was 90.36% at the optimal preparation conditions, and the content of linolenic acid, linoleic acid, oleic acid, palmitic acid and stearic acid was 40.71%, 27.25%, 22.40%, 7.23% and 1.60%, respectively. The acid value and peroxide value of peony seed oil were 2.61 mg·g^-1 and 1.56 mmol·kg^-1, respectively. All the test results are higher than the requirements of the peony seed oil quality standard "Standard of the People's Republic of China for Food Industry LS/T 3242-2014".

Key words: peony seed oil, screw press, Box-Behnken Design, α-linolenic acid, suitable temperature extraction process

CLC Number:

S685.11

LI Wen-Gang, SUN Xiao-Li, ZU Yuan-Gang, ZHAO Xiu-Hua. Optimization Peony Seed Oil Extraction Process at Suitable Temperature and Physicochemical Property Analysis[J]. Bulletin of Botanical Research, 2020, 40(1): 73-78.

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