TY - JOUR A2 - Ibraliu, Alban AU - Medina, Jessica AU - Caro Rodríguez, Diana AU - Arana, Victoria A. AU - Bernal, Andrés AU - Esseiva, Pierre AU - Wist, Julien PY - 2017 DA - 2017/11/01 TI - Comparison of Attenuated Total Reflectance Mid-Infrared, Near Infrared, and¹H-Nuclear Magnetic Resonance Spectroscopies for the Determination of Coffee’s Geographical Origin SP - 7210463 VL - 2017 AB - The sensorial properties of Colombian coffee are renowned worldwide, which is reflected in its market value. This raises the threat of fraud by adulteration using coffee grains from other countries, thus creating a demand for robust and cost-effective methods for the determination of geographical origin of coffee samples. Spectroscopic techniques such as Nuclear Magnetic Resonance (NMR), near infrared (NIR), and mid-infrared (mIR) have arisen as strong candidates for the task. Although a body of work exists that reports on their individual performances, a faithful comparison has not been established yet. We evaluated the performance of¹H-NMR, Attenuated Total Reflectance mIR (ATR-mIR), and NIR applied to fraud detection in Colombian coffee. For each technique, we built classification models for discrimination by species ( C. arabicaversus C. canephora(or robusta)) and by origin (Colombia versus other C. arabica) using a common set of coffee samples. All techniques successfully discriminated samples by species, as expected. Regarding origin determination, ATR-mIR and¹H-NMR showed comparable capacity to discriminate Colombian coffee samples, while NIR fell short by comparison. In conclusion, ATR-mIR, a less common technique in the field of coffee adulteration and fraud detection, emerges as a strong candidate, faster and with lower cost compared to¹H-NMR and more discriminating compared to NIR. SN - 1687-8760 UR - https://doi.org/10.1155/2017/7210463 DO - 10.1155/2017/7210463 JF - International Journal of Analytical Chemistry PB - Hindawi KW - ER -