KADAR KALKON TOTAL DI DALAM EKSTRAK ETANOL BATANG ASHITABA (Angelica keiskei Koidzumi)
Abstract
ABSTRAK
Ashitaba (Angelica keiskei) merupakan salah satu tanaman obat yang terbukti memiliki aktivitas antioksidan setara dengan vitamin E. Aktivitas antioksidan umumnya ditunjukkan oleh metabolit sekunder tanaman, terutama flavonoid. Di dalam batang ashitaba terkandung senyawa kalkon yaitu xantoangelol (XAG) dan 4-hidroksiderisin (4-HD), yang tergolong ke dalam flavonoid dengan cincin C terbuka. Penelitian ini bertujuan untuk menetapkan kadar kalkon total (dihitung sebagai XAG) di dalam ekstrak etanol batang ashitaba. Tanaman ashitaba diperoleh dari Gunung Rinjani, Lombok, dan dideterminasi di Sekolah Ilmu dan Teknologi Hayati Institut Teknologi Bandung. Penetapan kadar kalkon total dilakukan menggunakan metode spektrofotometri standar adisi. Hasil penapisan fitokimia menunjukkan bahwa ekstrak etanol batang ashitaba mengandung senyawa flavonoid, alkaloid, polifenol dan tanin, sedangkan kalkon total yang terkandung di dalam ekstrak etanol kering batang ashitaba dihitung sebagai XAG adalah 0,836 % b/b.
Kata kunci : Ashitaba, antioksidan, xantoangelol, 4-hidroksiderisin, kalkon total.
TOTAL CHALCONE CONTENT IN THE ETHANOL EXTRACT OF ASHITABA STEMS (Angelica keiskei Koidzumi)
ABSTRACT
Ashitaba (Angelica keiskei) is a medicinal plant that has been proven to possess antioxidant activity equal to that of vitamin E. This antioxidant activity usually belongs to the plants secondary metabolites, e.g. flavonoids. The ashitaba stem contains chalcone compounds, e.g. xantoangelol (XAG) and 4-hydroxiderricin (4-HD), which are categorized as open C-ring flavonoids. The purpose of this study was to determine total chalcone content (calculated as XAG) in ethanol extract of ashitaba stem. Ashitaba plant was obtained from Mount Rinjani, Lombok, and was identified at School of Biology Sciences and Technology, ITB. The total chalcone was determined by using standard addition spectrophotometric method. Result showed that the ethanol extract of ashitaba stem contain flavonoids, alkaloids polyphenol, and tannins, whereas the dried extract of ashitaba stem contained 0.836% w/w of total chalcone calculated as XAG. Keywords: Ashitaba, antioxidant, xantoangelol, 4-hydroxiderricin, total chalcone.
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DOI: 10.33751/jf.v9i2.1579
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