Subcritical Water Extraction of Lycopene from Tomato Waste

Abstract

Subcritical water extraction (SWE) of lycopene from tomato waste and antioxidant activities was studied with response surface design. The optimal extracting conditions were identified as follows: 10g tomato waste sample with 73.8 ml double-distilled water, extraction temperature 192.01°C, and extraction time 15.80 min. The average extraction yield of lycopene amounted to 282.36 μg/g, whereas the extraction yield with Ultrasound microwave assisted extraction (UMAE) for three times was 207.63 μg/g. The DPPH free radical scavenging activity of lycopene was better than that of BHT. All these results indicate that SWE could be a more attractive eco-friendly alternative extract method with a good efficiency in the future.