Extraction of Volatile Oil from Tangerine Peel by Low-temperature Continuous Phase Transition and Analysis of Its Properties
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Abstract:
Tangerine peel is a traditional Chinese medicinal material. The volatile oil of tangerine peel has a variety of pharmacological effects, such as dispelling phlegm and relieving asthma. The volatile oil was extracted by continuous phase transition n-butane in low- temperature environment, and the effects of granularity, extraction time, extraction temperature, extraction pressure and separation temperature were discussed. The orthogonal experiment (L9(34)) was adopted to optimize extraction conditions, the extracted yield was 3.31% with granularity of 40 mesh, extraction time of 60 min, extraction temperature of 30 ℃, extraction pressure of 0.6 MPa, and separation temperature of 70 ℃. The physical and chemical properties and fatty acid compositions of oil were analyzed. The extracted tangerine peel oil was semisolid paste with a yellow to reddish brown color, containing 10.6% of methoxy flavone, iodine value 122.4 g I/100 g, acid value 73.8 mg KOH/g and peroxide value 0.1 g/100 g. The major components of volatile oil from tangerine peel were linoleic acid (30.01%), 9-Octadecenoic acid (25.43%), linolenic acid (16.32%), and stearic acid (4.56%) by GC-MS.
