Detection of Veterinary Antimicrobial Residues in Milk through Near-Infrared Absorption Spectroscopy

Figure 3

Hotelling score plot of statistical analysis (PCA) showing clustering data for control milk samples GEN1, GEN2, and GEN3 (blue square); milk with 100 μg/L of enrofloxacin, EN100.1, EN100.2, and EN100.3 (green triangles); 100 μg/L of terramycin, TE100.1, TE100.2, and TE100.3 (black rhombuses); and milk with 4 μg/L of penicillin, PE4.1, PE4.2, and PE4.3 (red circles).