MIR and Vis/NIR spectroscopy cannot authenticate organic bulk milk

This study aimed to evaluate the feasibility of mid-infrared (MIR; 5000–900 cm?1) and visible/near-infrared (Vis/NIR; 400–2500 nm) spectroscopy discriminate organic (ORG) from conventional (CONV) bulk milk. Samples (n = 225) 24 farms (ORG, n 12; CONV, 12) located in same area, mainly rearing Holstein-Friesian cows, under similar management conditions, except for ORG livestock spending a period time on pasture, were collected September 2019 August 2020. Chemical composition lactation ration was between groups. Mid-infrared Vis/NIR spectrum each sample collected. Principal component analysis (PCA) partial least squares-discriminant (PLS-DA) done using R software. For PLS-DA, records divided train set (8 farms/group) test (4 farms/group), only wavelengths with VIP >1 retained. The PCA not able both PLS-DA revealed an accuracy model 54.1% 62.9%, MIR Vis/NIR, respectively. In conclusion, infrared regions performed similarly, moderate could be related similarity selected categories.HighlightsInfrared spectra milk samples similar.Low analysis.Both similarly.