Extraction and Purification of Oil from Garlic Bulb

Abstract

The aim of this research work is to extract and refine essential oil from garlic seed. Soxhlet extractor was used for the extraction process with hexane as the solvent. The extraction yielded 2.04% of oil from the garlic seed. The oil extracted was subjected to refining process by degumming, neutralization and bleaching using inactivated clay as absorbent. Different physico- chemical parameters for both the crude and refined extracts were determined. The pH, specific gravity, refractive index, Saponicatiopn value, peroxide value and iodine value were recorded as 5.62, 0.9038, 1.463, 208.97 mg KOH/g, 0.5 meq/kg and 79.31gI2/g respectively for refined garlic oil. The characterization analysis revealed that tested parameters were within the standard values except for the saponification and specific-gravity of crude garlic oil.