Erdawati, Hanhan Dianhar, Hasna Khairunnisa
This study aims to identify spent coffee ground pretreatment with NADES solvent effect on coffee oil yield. The types of NADES used are choline chloride: urea, choline chloride:fructose, and choline chloride:glucose. Spent coffee grounds were pretreated and extracted using Ultrasound-Assisted Extraction (UAE) method. Pretreatment at 1:10 (g/g) SCG:NADES ratio, 6 minutes on 55°C temperature. Then pretreated spent coffee grounds are extracted with n-hexane and separated solvent from coffee oil from pretreatment coffee oil are palmitic acid (46,75%), linoleic acid (48,07%), and stearic acid (1,66%)using a rotary evaporator. Pretreatment coffee oil yields are 17,6%, meanwhile the non-pretreatment yields only 13,53%. Fatty acid in coffee oil was identified using FTIR and GC-MS. The fatty acid compounds © Published under licence by IOP Publishing Ltd.
Department of Chemistry, Universitas Negeri Jakarta, Indonesia
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