Optimization Technique of Ultrasonic-Assisted Extraction of Vitamin C from Catnip by RSM
This paper studied the optimization technique of ultrasound-assisted extraction of catnip vitamin C by response surface methodology.According to single factor experimental results,the experiment was designed and optimized using the Central Composite Design.The results showed the optimal extraction condition was ethanol concentration 70％,the liquid material ratio 30∶1(mL/g),ultrasonic temperature 60 ℃,and ultrasonic time 30 min.Under the condition,the vitamin C extraction yield was 24.39 mg/g,and it was close with the value predicted from the theoretical model which was 24.46 mg/g.Antioxidant determination of extracts was carried out,which indicated that the response surface model was effective and reliable.The research provided certain theoretical basis for the industrial extraction of vitamin C from catnip.
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