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Abstract:In the present paper, simple, rapid and reliable colour tests such as Sodium azide test, Modified nitric acid test, Azo dye test, Boudouin test, Hexabromide test, Halphen's test, Molybdate method and Solvent partition test have been reported for the detection of adulterants in edible oils. These are performed for synthetic mustard oil, argemone oil, physically refined rice bran oil, sesame oil, linseed oil, cottonseed oil, castor oil and palmolein respectively (respective sensitivity level as 0.1%, 0.1%, 2.5%, 0.2%, 1.0%, 0.5% and 2.0%).

Citrus fruits represent the third major fruit in India, next to Mango and Banana. Citrus fruits comprise about 10% of total fruits produced in India (4.57 million tones out of 44.04 million tones) (1). It occupies about thirteen percent of total area under fruit cultivation (0.48 million hectare out of 3.72 million hectare). India produces about five million tones of Citrus fruit cultivated over 0.5 million-hectare area. The production of Citrus fruit in India is about seventy four percent of the world citrus fruit production. India has a huge potential of producing Citrus peel oil i.e. about 2700 metric tones per annum (based on 0.6% recovery of oil from whole fruit), while very small amount (2-3 tones) is being produced presently.Genus Citrus comprises sixteen species and eight varieties. Among these Citrus reticulata (Mandarin) is the most important commercial crop which occupies about 39% of the area under cultivation of Citrus fruit. Citrus flavours are among the most popular fruit flavours for beverages. Citrus fruit comprised of about 25-30% peel. The peel consists of two parts inner part i.e. albedo which is white in colour and outer part i.e. flevedo which is green in colour. Peel oil is confined in oblate to spherical shaped oil glands which is known as oil sacs. The oil sacs are intercellular cavities embedded irregularly at different depth in the flavedo beneath 355 JOS

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