Pengaruh Kadar Flavonoid Total dan Waktu Kontak Flavonoid Ekstrak Daun Katuk sebagai Antioksidan pada Minyak Kelapa

Abstract

This research aims to determine the effect of total flavonoid concentration and contact time the flavonoid of katuk leaves extract as antioxidants in coconut oil. The process used is extraction of katuk leaves then extract with the total flavonoid concentration 6,668%, 7,748% and 27,909% was used as a sample and contacted in the coconut oil with the contact time of 2, 4 and 6 days. Then, analysis which done of the coconut oil are the acid number, the iodine number and the peroxide number. The result obtained are the total flavonoid concentration increasing cause a decrease the acid number, the iodine number increase and decrease the peroxide number which proved that katuk leaves extract can be used as antioxidants in the coconut oil with the best result is the total flavonoid concentration in 27,909% where the acid number is 0,962 mg KOH/g, the iodine number is 38,705 g I2/100 g and the peroxide number is 13,333 Meq/kg. The contact time of flavonoid in the coconut oil which increasing cause oil properties is getting worse but the results are better than the oil without the addition of extract.