Optimization of Ultrasonic Assisted Extraction of Macadamia Oil and Its Physicochemical Properties
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (11): 2217-2226.DOI: 10.3969/j.issn.1000-2561.2019.11.017

• Agricultural Product Processing, Preservation, Storage, Analysis and Detection • Previous Articles     Next Articles

Optimization of Ultrasonic Assisted Extraction of Macadamia Oil and Its Physicochemical Properties

TU Xinghao1,2,SUN Liqun3,TANG Jinghua1,ZHANG Ming1,SHUAI Xixiang1,CHEN Hong2,DU Liqing1,*()   

  1. 1. South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture and Rural Affairs, Zhanjiang, Guangdong 524091, China
    2. Oil Crops Research Institute, Chinese Academy of Agricultural Sciences / Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, Hubei 430062, China
    3. Tropical Crop College, Yunnan Agricultural University, Puer, Yunnan 665000, China
  • Received:2019-02-18 Revised:2019-04-10 Online:2019-11-25 Published:2019-11-28
  • Contact: Liqing DU

Abstract:

In order to improve the extraction rate of macadamia oil and obtain high quality oil, an ultrasonic assisted method was used to extract macadamia oil, and the physicochemical properties of the extracted oil were analyzed. The effects of extraction solvent, ultrasonic power, ultrasonic time and ratio of liquid to material on the extraction rate were investigated by single factor experiments, and then the extraction process parameters were optimized by response surface methodology (RSM). The results showed that the extraction rate of macadamia oil was higher with n-hexane, and the yield of macadamia oil increased with the proper increase of ultrasonic power, ultrasonic time and solvent content. The optimum extraction conditions of macadamia oil were as follows: the ratio of liquid to material 9.6∶1 (mL/g), the ultrasonic power 520 W, the ultrasonic time 32 min, and the yield of macadamia oil was 69.1% under the conditons. The total yield extracted twice reached 96.3%. The results showed that ultrasonic assisted extraction was an effective method for macadamia oil extraction. In terms of fatty acid composition and physicochemical properties, macadamia oil is a kind of natural vegetable oil with high nutritional value.

Key words: macadamia (Macadamia integrifolia) oil, ultrasound-assisted extraction, response surface optimization, physicochemical properties