Detection of Peanuts in Adulterated Tehina and Halva

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Abstract
A proposed method for detection and approximate estimation of peanut admixtures in adulterated tehina and halva (local sesame products) at a minimum level of 3–7% is presented which is based on the difference in behenic acid content of oils extracted from peanuts and sesame seeds. Long-chain saturated fatty acid esters from the analyzed mixture of methyl esters were isolated through urea complexing, and the gas chromatographic technique of analysis was used. Behenic acid was found to be present not only in peanut oil (as reported in the literature) but also in sesame oil in amounts not exceeding 0.3%.

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