Utilização de espectroscopia no infravermelho médio e próximo para detecção de resíduos de medicamentos antiparasitários em leite cru

Abstract

According to the Food and Agriculture Organization of the United Nations (FAO/WHO), milk and its derivatives are the most consumed foods in the world, being a source of fats, proteins, vitamins and energy that are extremely important for proper functioning. of the human organism. This study focuses on the detection and sensitivity of antiparasitic drug residues in raw milk through Fourier Transform Middle and Near Infrared Spectroscopy (FT– MIR and FT–NIR). For this, samples of raw milk, pure antiparasitic medicine and samples simulating contamination with antiparasitics were considered. The simulated samples were made by adding antiparasitic veterinary drugs to the raw milk samples at the following concentrations: abamectin 10 µg/L, doramectin 15 µg/L, ivermectin 10 µg/L and eprinomectin 20 µg/L. To analyze the sensitivity of the technique, concentrations above and below the maximum residue limits (MRL) were used. The statistical tool used to discriminate the samples was Principal Component Analysis (PCA). The results showed that it is possible to discriminate different concentrations of antiparasitics diluted in raw milk. The methodology proved to be fast, sensitive and accurate within what is provided for by current legislation.