Ultrasound-assisted extraction of total carotenoids in papaya epicarp and its application in Frankfurt sausage

ABSTRACT The agro-industrial processing of fruits generates a significant volume of by-products, which can be valued as a source of natural ingredients in the food industry. The objective of this research was to optimize the ultrasound-assisted extraction (UAE) of total carotenoids in papaya epicarp and to use the extract as an ingredient during the storage of the Frankfurter sausage. The maximum assisted extraction of total carotenoids (66.03 ± 0.60 mg of β-carotene/100g) in the papaya epicarp by ultrasound is achieved when working at temperatures of 30 °C, for 60 min and a solid-liquid ratio 0.0064 g/ml oil. The temperature presented the highest effect of extraction of total carotenoids, followed by solid-liquid ratio, and time in the UAE. Frankfurt-type sausages made from carotenoid lipid extract show a significant reduction in nitrites (p