Optimization of the extraction of lycopene from freeze-dried tomato powder
Response surface methodology was used to optimize extraction conditions of lycopene from freeze-dried tomato powder(≥200 mesh).On the basis of the optimum process,comparison of the effect of different pretreatments on the extraction yield of lycopene was studied.The results showed that the best extraction conditions for lycopene as follows: time 66.43 min,temperature 50.2 ℃,liquid-to-material ratio 12.75:1 and extraction times n=3.Under this condition,the average extraction yield of lycopene was 2.5825 mg/g DW(n=1).The predicted value was in consistent with the measured value,the reliability of the models was proved.The average extraction yield of lycopene of freeze-dried tomato powder was 2.5314 mg/g DW(n=1),which was obviously higher than yield of saponification tomato pulp,a better application value belonged to the former.