Gas‐liquid chromatography was used to determine the essential oil compositions of thyme, cumin, clove, caraway, rosemary, and sage. The basic components of these oils were thymol, cumin aldehyde, eugenol, carvonc, borneol and thujonc, respectively. The antifungal potential of the oils against Aspergillus parasiticus were investigated. The essential oils caused complete inhibition of both mycelial growth and aflatoxin production. The effectiveness followed the sequence: thyme > cumin > clove > caraway > rosemary > sage. The major components of the essential oils produced an inhibitory effect at minimum inhibitory concentrations equal to those obtained with the oils.

A method has been devised which gives the distribution of saturated and unsaturated fatty acids of pure and adulterated cow and buffalo ghee with lard or margarine. It involves fractionation of pure and adulterated butterfat into fractions by fractional crystallization. The composition of the fatty acids liberated by the hydrolysis of each of the fractions was determined by gas chromatography. Adulteration of cow and buffalo ghee with various levels of lard or margarine caused significant changes in certain fatty acids, i.e., 22:0, 18:1, 18:0 and 16:0. It is possible to determine the extent of admixture of lard or margarine to either cow or buffalo ghee by applying a simple regression equation for certain fatty acids. This technique provides a basis for the detection of lipid adulteration.

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Gas liquid chromatography (GLC) was used for the detection of lard and margarine added to buffalo and cow ghee. The chromatograms of the unsaponifiable matter could be divided into two parts representing hydrocarbons and sterols. Hydrocarbons were fractionated by GLC into 3–6 different compounds depending on the lipid origin. The sterols were cholesterol and β‐sitosterol. The content of cholesterol in lipid samples was in the following decreasing order: cow > buffalo > lard > margarine. With β‐sitosterol, the concentration order was: margarine > buffalo > cow > lard. The ratios of total hydrocarbons to total sterols in the unsaponifiable matter for margarine and lard were the most different for the various lipids. Adulteration of cow and buffalo ghee with various levels of lard or margarine caused significant changes in the unsaponifiable compounds. It is possible to determine the extent of admixture of lard or margarine to either cow or buffalo ghee by applying a simple regression equation for each unsaponifiable component. Hence, an examination of unsaponifiable matter appears to provide a rapid and simple laboratory method for the detection of ghee adulteration.

A method has been devised that gives the distribution of various fatty acids of pure and adulterated buffalo milk with cow milk. Gas chromatography (GC) was used for the qualitative and quantitative determination of fatty acids of authentic buffalo milk, cow milk and buffalo milk adulterated with cow milk. The milk fat was separated by fractional crystallization at ‐20 C into 2 fractions, i.e., semisolid and mother liquor. The concentration of fatty acids in the mother liquor changed significantly for 14:0, 16:0 and 18:1 as adulteration levels were increased. The fatty acids of the semisolid fractions change in the proportion of 16:0, 18:0 and 18:1 when cow milk is mixed with buffalo milk. By applying simple regression equations for these acids, adulteration of buffalo milk with 5% cow milk could be distinguished.