Phenolic Compound Extraction from Industrial Tomato Waste by Ultrasound-Assisted Extraction

Abstract

The tomato fruits have been reported that it contained high nutrient and bioactive compounds. The various Ultrasound-Assisted Extraction (UAE), including extraction temperature of 30, 50 and 70oC and extraction time of 10, 30 and 50 min, were performed in order to extract phenolic compound from tomato waste from industry. The total phenolic compound, total flavonoid content and also retained carotenoid in obtained extract were determined. Moreover, the DPPH radical scavenging activity of extract were studied. The results showed that the extraction temperature was a main factor which affected the amount of extracted bioactive compound. Moreover, the antioxidant activity of the extract was related to the total flavonoid and carotenoid content which can be draw the regression as follows; Y = 55.81 + 0.75X1 + 0.96X2 when radical scavenging activity, total flavonoid and carotenoid content was Y, X1 and X2, respectively. This regression analysis showed high significant (R2 = 0.74). Moreover, the UAE condition of 50oC for 50 min was a best condition which gave the highest antioxidant activity and in accordance with the high amount of total flavonoid and carotenoid content.