In many parts of India, mustard oil is widely consumed as an edible oil and for ceremonial use, and is a target for adulterations for economic gain. In a test of 20 samples, 80% of the samples were adulterated. Adulterants, some of them hazardous to human health, often consist of cheaper oils such as palm or sesame seed oil, as well as added dyes or flavor components. Tests were made using TLC Chromatography, nitric acid test, azo dye test and other test methods.
Pandey, P., Mishra, M. and Kesharwani, L. (October 6, 2019). “Examination of Various Adulterants in non-branded Mustard Oil for Forensic Considerations”. Academic Journal of Forensic Science.