SCREENING OF PHOTOCHEMICALS AND ANTIOXIDANT ACTIVITIES OF LIME ROOT EXTRACTS (Citrus Aurantifolia (Cristm.) Swingle) USING DPPH METHOD

Indonesia is a country that is very rich in natural ingredients, and has natural products that are very beneficial for health. One natural ingredient that are beneficial for health is lime root which is generally used as an herbal medicine. In Tumbang Kunyi , Central Kalimantan , lime root is believed for generations to treat ulcers. Based on this statement, the researcher intends to conduct further research on lime root. To analyze the content of secondary metabolites and antioxidant activity in lime root extract. This type of research is qualitative descriptive observational. Extraction by maceration method. Phytochemical screening with color reagent test and KLT. Antioxidant activity by DPPH method. Extraction of lime root as much as 400 grams with 7 liters of 96% ethanol obtained a thick extract of 14.52 grams. Phytochemical screening results with the color reagent and KLT showed that lime root contains alkaloids, flavonoids, saponins and tannins and antioxidant activity test results are obtained is 24 , 81 ppm. From this study, it can be concluded that secondary metabolites contained in lime root ( Citrus aurantifolia (Cristm.) Swingle) based on phytochemical tests and KLT contain alkaloids, flavonoids, saponins and tannins. Lime root also has a very active antioxidant activity based on the obtained IC50 value of 24 , 81 ppm.