Comparison of the extraction of lycopene from tomato skin with and without ultrasound by Response Surface Methodology

Tomato skin that is a byproduct obtained during the tomato processing is a rich source of lycopene which has a potent antioxidative and colorant properties. This study has been carried out with the aim to investigate the influence of three variables in presence and absence of ultrasound on extraction yield of Lycopene. Ultrasonic water bath was used for producing ultrasound and magnetic stirrer heater was used for instance experiments in order to comparison of results. Response surface methodology using the central composite rotatable design (CCRD) model was used for design of experiments. The maximum concentration of extract was 2.497 mg/l in presence of ultrasound and 1.772 mg/l in absence of ultrasound. The results show that extracting temperature and the ratio of solvent to sample have a significant effect on extraction yield while extracting time doesn''t t have such a significant effect in presence and absence of ultrasound. The results show that using ultrasound bath enhanced the efficiency of extraction yield by %37.