To increase the resveratrol content in peanut oil,peanut root was pretreated with ultrasonic cell crushing,and then peanut oil and peanut roots were mixed and stirred for extraction to prepare resveratrol-rich peanut oil.The preparation process conditions of resveratrol-rich peanut oil were optimized by single factor experiment,and the quality of the prepared resveratrol-rich peanut oil was analyzed.The results showed that the optimal process conditions were obtained as follows:particle size of peanut root 75μm(200 mesh),ultrasonic time 15 min,ultrasonic power 325 W,peanut root-water mass ratio 1∶8,peanut root-peanut oil mass ratio 1∶6,extraction temperature 80 ℃,and extraction time 1 h.Under these conditions,the resveratrol content in peanut oil increased from 0.12 mg/kg to 11.98 mg/kg.The prepared resveratrol-rich peanut oil met the requirements of grade 1 pressed finished oil in GB 1534-2017 Peanut oil,and there was no significant difference in color between it and grade 1 pressed peanut oil.Thus the green preparation of resveratrol-rich peanut oil is achieved by the optimized process.
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