Ilya Kuselman, https://orcid.org/0000-0002-5813-9051, has received his PhD in inorganic chemistry from Kalinin State University, and DSc in analytical chemistry – from R&D Institute for Rare Metal Industry, Moscow, Russia. Since 1971 to 1990 Ilya has been a researcher and then Head of Metrology in Chemistry Division of All-Union R&D Institute of Non-ferrous Secondary Metals, Donetsk, Ukraine, former USSR. Since 1991 to 2014 he was a co-worker and further Director of the National Physical Laboratory of Israel. Now Ilya is Independent Consultant on Metrology. He has published above 230 papers on metrology and quality in analytical chemistry. Ilya is a member of the CITAC and ISO/TC 334, IUPAC Analytical Chemistry Division and Subcommittee on Metrology in Chemistry.