超声波辅助提取野木瓜籽油工艺研究

Ultrasound-assisted extraction of wild papaya seed oil

以野木瓜籽为原料,采用超声波辅助提取野木瓜籽油,通过单因素试验和正交试验研究野木瓜籽油最佳提取工艺条件。结果表明:野木瓜籽油最佳提取工艺条件为以正己烷为提取剂、料液比1∶5、超声温度30℃、超声时间40 min、超声功率210 W,在该条件下野木瓜籽油产率为28.27%;所得野木瓜籽油色泽呈金黄色、澄清、透明度高、有野木瓜的芳香味,产品品质较好,相对密度(d^(20)_4)0.896 9±0.01,折光指数(20℃)1.466 5±0.01,皂化值(KOH)(182.0±1.87)mg/g,碘值(I)(90.0±0.55)g/100 g,酸值(KOH)(2.7±0.02)mg/g,过氧化值(0.018±0.03)g/100 g,其酸值和过氧化值指标均符合国家食用植物油标准,具有一定的推广应用前景。

Wild papaya seed was taken as raw material and the ultrasound - assisted extraction technology was used to extract wild papaya seed oil. The single factor experiment and orthogonal experiment were adopted to study the optimal extraction conditions. The results showed that the optimal extraction condi- tions of wild papaya seed oil were obtained as follows ： with n - hexane as extraction solvent, ratio of solid to liquid 1： 5, ultrasonic temperature 30 ℃, ultrasonic time 40 rain and ultrasonic power 210 W. Under the optimal extraction conditions, the yield of wild papaya seed oil was 28.27 %. The quality of wild papaya seed oil was good with golden color, clarification, high transparency and fragrant smell of wild papaya. The relative density （ d1^20）, refractive index （20 ℃ ）, saponification value, iodine value, acid value and peroxide value were 0. 896 9±0.01, 1. 466 5±0.01, （ 182.0±1.87） mgKOH/g, （90.0 ±0.55） gI/100 g, （2.7±0.02） mgKOH/g and （0. 018±0.03） g/100 g, respectively. The acid value and peroxide value of wild papaya seed oil accorded with the national standard of edible vegetable oil. So pa- paya seed oil had certain developing future.