Extraction from different parts of Citrus maxima flowers using ultrasound as an aid and study of their composition and function

Ultrasonic assisted extraction is frequently referred to as a green environmental protection method. The flower of Citrus maxima (FCM) has been used as a health tea drink in China, although the tea drink lacks clear compound composition identification and functional research. In order to fully use Citrus fruit by-products and further explore the functional features of FCM, this paper isolated, identified, and assessed the chemical compounds in the petals, stems, styles, receptacles, stamens, and buds of FCM extract. There are 88 compounds were recovered, including 23 compounds in the bud, 21 compounds in the petal, 19 compounds in the stem, 11 compounds in the receptacle, 20 compounds in the stamen, and 13 compounds in the style. Antioxidant experiments revealed that the FCM's various compounds had observable impacts in scavenging free radicals (38.44%–58.35%). The aforementioned study demonstrates that the pomelo by-products were developed into useful components using ultrasonic aided extraction technique. FCM has flavor-rich compounds that make it suited for use as an antioxidant tea beverage and offers practical suggestions for preparing healthy products.