The high value of spices makes them one of the most popular targets for intentional adulteration. Researchers in Brazil developed an efficient method for fraud detection: Near-infrared spectrometer (NIR) associated with chemometrics. This method is able to detect adulterants like corn flour and cassava in spice samples, revealing a high rate of adulteration, between 62% for commercial black pepper and 79% for cumin samples.
- Amanda Beatriz Sales de Lima et al. (January 2020). “Fast quantitative detection of black pepper and cumin adulterations by near-infrared spectroscopy and multivariate modeling”. Food Control. Vol. 107.