Extraction of sambung nyawa leaves (Gynura Procumbens [Lour]. Merr) using methanol as solvent

Abstract

Sambung nyawa leaves (Gynura Procumbens [Lour]. Merr) is used as traditional medicine. Sambung nyawa leaves contain flavonnoid compound which can be used as natural antioxidant. This research was done to analyze the effect of the additon of Sambung Nyawa leaves extract as antioxidant and its ability to keep the quaity of coconut oil. The variables used in this research were the ratio of raw material to solvent (m/v) and extraction temperature. First, extraction was done to extract flavonoid compound from Sambung Nyawa leaves. The extract of Sambung Nyawa leaves with the highest flavonoid compound was mixed with coconut oil for 3 days, 6 days, 9 days, 12 days and 15 days. Total flavonoid level from Sambung Nyawa leaves was analyzed by UV-Vis Spectrophotometry. Acid number, iodine number and peroxide number of the coconut oil were also analyzed in this research. The highest total flavonoid level obtained was 1.32% at 55°C by using 1:10 (m/v) of raw material to solvent ratio. The lowest acid number, the highest iodine number and the lowest peroxide number in coconut oil with Sambung Nyawa leaves extract after it was kept for 3 days were 0.45%, 7.90g I2/100g and 4.40 mg O2/100g respectively.