Geographic authentication of Asian rice (Oryza sativa L.) using multi-elemental and stable isotopic data combined with multivariate analysis

•Geographic authentication of rice is possible with elemental/isotope ratio analysis.•Mass spectrometry data could distinguish rice samples from six Asian countries.•Chemometric multivariate techniques clearly separated rice from Korea.•δ34S, Mn, and Mg are candidate biomarkers for Asian rice geographic authentication.