Standardisasi dan Pengukuran Kadar Flavonoid Daun Ketepeng Kecil (Senna tora (L.) Roxb.) Menggunakan Metode Spektrofotometri UV-Vis

Sickle senna (Senna tora (L.) Roxb.) is a wild plant that is used by the community as a traditional medicine to treat diarrhea and intestinal worms. In the development of plants as traditional medicines, it is necessary to standardize the quality of plant materials to ensure their quality, stability, and safety. This study aims to determine the standadization of extracts both specifically and non-specifically and to determine the level of falvonoids in the fraction of sickle senna (Senna tora (L.) Roxb.) leaves. This study applies a phytochemical screening test, specific parameter test, non-specific parameter test, and flavonoid levels determination. The result of phytochemical screening shows that the fraction containing flavonoid compounds is 70% ethanol fraction. The results of standardization for specific parameter show the organoleptic ethanol fraction of 70% is in the form of semi-solid/viscous, black color and distinctive smell, with water soluble extract content is 19.08%, and ethanol soluble extract content is 23.35%. the standardization result for non-specific parameter shows that the total ash content is 1.76%, the acid insoluble ash content is 2.890%, drying shrinkage is 4.96%, and water content is 18.80%. meanwhile, metal and microbial contamination show no contamination in the 70% ethanol fraction. The result for the analysis of the flavonoid content of the 70% ethanol fraction. The result for the analysis of the flavonoid content of the 70% ethanol fraction of sickle senna leaves is carried out at a wavelength of 438.36 nm with an absorbance value of 0.0154. The total flavonoid level is calculated by the standard linear equation of quarcetin, which is y=0.0648x + (-0.0232) with a correlation coefficient (r2) = 0,9948 and a total flavonoid content of 4.713%