Effect of Hydro Distillation Process on Extraction Time and Oil Recovery at Various Moisture Contents From Mentha Leaves

The experiments were carried out to study the kinetics of mentha oil extraction from mentha leaves (Mentha arvensis L.) and the quality analysis was carried out for the oil extracted. The oil was extracted from mentha leaves at three different moisture contents of 74.30 per cent (fresh leaves), 42.30 per cent (shade dried) and 19.35 per cent (sun dried) using hydro distillation method. Various physicochemical tests were carried out on the oil extracted. The results revealed that the hydro distillation process took more time for oil extraction and oil recovery was less. Various physicochemical properties such as acid value, refractive index, specific gravity, saponification values and solubility in water did not show significant variations with respect to oil extracted by differently pretreated mentha leaves.