The National Accreditation Body of Austria confirms the accreditation (ID nr. 0428; business nr. 2020‑0.276.673 and 2023-0.266.548) of the BOKU University, Gregor-Mendel-Str. 33, A‑1180 Vienna as Proficiency Testing Provider according to EN ISO/IEC 17043:2023 with the initial date of May 4, 2020. Site/unit: Department of Agricultural Sciences, Institute of Bioanalytics and Agro-Metabolomics, (previously: Department for Agrobiotechnology), IFA‑Proficiency Testing Scheme, Konrad-Lorenz-Straße 20, A‑3430 Tulln. This guarantees international comparability and the recognition of our competence.