Geographical origin differentiation of saffron spice (Crocus sativus L. stigmas) - Preliminary investigation using chemical and multi-element (H, C, N) stable isotope analysis

► Geographical differentiation of saffron spice by multi-element isotope analysis. ► UV-Vis, HPLC and GC techniques were used for saffron chemical characterisation. ► Differentiation according to chemical composition was possible with 61%. ► The combined bio-element stable isotope data reliably classified 100% of these samples.