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Distillation and storage of oil
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Mint oil is obtained by distilling either the fresh or the dry herb. The distillation is done both in primitive and modern stills; in the former the principle of water and steam-distillation is followed, while in the latter steam generated in a separate boiler is employed. The stems are removed from the dried material prior to distillation, because they constitute 30 to 50 % of the material and contain only traces of the oil. The average yield of oil is 50-70 kg/ha. Although bergamot mint as well as Japanese mint gives an average yield of 70-100 kg/ha, the yield of peppermint oil is lower with an average of 50 kg/ha. Storage of oil Mint oil is a light and golden-coloured, motile liquid and it should be completely free from moisture before storage. It is stored in large steel, galvanized steel or aluminum containers, filled up to the brim to protect against any air remaining inside and placed in a cool storage godown, away from light and humidity. |
Last modified: Tuesday, 3 April 2012, 9:35 AM