A highly accurate statistical model has been developed to determine the exact type
of chamomile used in the production of commercial herbal products. The model was
developed from accurate GC/MS data obtained with an Agilent 7890 GC and Agilent
5975 GC/MSD. Quality control of the samples was performed by Principal
Component Analysis (PCA) and a sample class prediction model based on Partial
Least Squares Discriminant Analysis (PLS-DA) was constructed. The model demon-
strated 100% accuracy for both recognition and prediction abilities. In addition,
35 commercial products and 11 essential oils purported to contain chamomile were
subsequently predicted by the model based on PLS-DA.