Total reflection X-ray fluorescence analysis of elemental composition of herbal infusions and teas.
Aleksandra WinklerMirjam RauwolfJohannes H SterbaPeter WobrauschekChristina StreliAnna TuryanskayaPublished in: Journal of the science of food and agriculture (2020)
A chemometric approach (PCA) was applied, and differences between teas and herbal infusions were found. This was further corroborated by explicit differentiation of one botanical family, Theaceae. The influence of packaging (tea bags) on herbal material was identified. The three types of tea (Camellia sinensis) appeared to be separated with PCA, and elemental concentrations in Pu-erh changed with multiple steepings.