Identification of milk from different animal and plant sources by desorption electrospray ionisation high-resolution mass spectrometry (DESI-MS)

Model Builder (AMX) v 1.0.1563.0 (Waters Research Centre, Budapest, Hungary). AMX was used to create PCA models, and linear discriminant analysis (LDA) models. All chemometric models were calculated using the mass region of m/z 100–2000, a spectral intensity limit of 1.00E6 counts, and a mass bin width of 0.2 Da. The validation of each model was assessed by the software’s built in “20% out” bootstrapping option. The model was calculated using 80% of the samples and data files left out were...