“…The association of infrared spectroscopy and chemometrics has provided advances in food safety and quality control, proving to be fast, effective and reliable for investigating food composition, authenticity checking, identification and quantification of food contaminants and adulterants in food products 11,12,16,18–20 . FTIR spectroscopy combined with chemometrics has been useful for analysis of veterinary drug residues 21,22 . Studies have shown the feasibility of determining different veterinary medicaments, such as antibiotics, at μg L −1 (ppb) levels in milk using FTIR 7,23,24 and mid‐infrared spectroscopy 25 …”