@thesis{thesis,
		author={Alifia  Ni''ma},
		title ={ANALISIS KADAR TOTAL FLAVONOID EKSTRAK
ETANOL DAUN ADAS (Foeniculum vulgare)
SECARA SPEKTROFOTOMETRI VISIBEL},
		year={2021},
		url={http://librepo.stikesnas.ac.id/517/},
		abstract={Flavonoid is one the compounds in nature that play a role in increasing body
immunity. Sources of flavonoid can be found in fennel leaves. This research aims
to determine total flavonoid content in fennel leaves (Foeniculum vulgare) using
the Visible Spectrophotometry method. Extraction is done using the maceration
method with 96% ethanol solvent. The qualitative analysis of flavonoid using
NaOH, Wilstater-cyanidin method, and AlCl3. Quersetin used as standard solution.
Quantitative analysis was using colorimetry method with reagent AlCl3 to forms
complex compound. Quantitative analysis was continued with Visible
Spectrophotometry on operating time at the 28th minute and a wavelength of 430,5
nm. The results of the qualitative analysis showed that the ethanol extract of fennel
leaves was positive flavonoids. The average concentrations of total flavonoids of
fennel leaves ethanol extract is 99,2 mg QE/g extract with a variation coefficient
value of 1,27%.}
		}