Prof. Dr. Alfred Wiedensohler

Prof. Dr. Alfred Wiedensohler is a Professor at the Faculty of Physics and Geoscience at the University of Leipzig and Head of the Department of Experimental Aerosol and Cloud Microphysics at the Leibniz Institute for Tropospheric Research (TROPOS). He has worked in the field of aerosol physics, aerosol technology and atmospheric aerosol since 1983. He is presently adjunct professor at the Fudan University in Shanghai, China. He is author and co-author of more than 380 peer-reviewed publications.  He is head of the WMO-GAW World calibration Center of Aerosol Physics and the European Center for Aerosol Calibration of the European Research Infrastructure ACTRIS.

Dr. Ilya Kuselman

Ilya Kuselman has received his Ph.D. in inorganic chemistry from Kalinin State University, and D.Sc. in analytical chemistry – from R&D Institute for Rare Metal Industry, Moscow, Russia. Since 1971 to 1990 Ilya has been researcher and then Head of Metrology in Chemistry Division of All-Union R&D Institute of Non-ferrous Secondary Metals, Donetsk, Ukraine, 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 200 papers on metrology and quality in analytical chemistry. Ilya is a member of CITAC, ISO/REMCO and IUPAC Analytical Chemistry Division, Editor of CITAC News and Chair of the IUPAC Interdivisional Working Party for Harmonization of Metrology and Quality Guidelines.

Dr. Michela Sega

Dr. Michela Sega is a chemists and holds a PhD in Chemical Sciences, from the University of Torino, Italy. She is the head of the Scientific Division “Applied Metrology and Engineering” of the Italian Metrology Institute “Istituto Nazionale di Ricerca Metrologica – INRIM”. Her main research activities are related to metrology in chemistry, mainly focused on gas analysis and organic analysis.

She is currently the chairperson of the IMEKO Technical Committee TC8 “Traceability in metrology” and the past chairperson of CITAC. She is a member of Eurachem and had been the chairperson of the EURAMET Technical Committee on Metrology in Chemistry from 2011 to 2015. She is co-author of about 30 publications on international and national journals.

Dr. Narine Oganyan

Narine Oganyan has received her Ph.D. from  D.I. Mendeleev Institute of Chemical Technology (1992), Moscow, Russia. In 1985 - 1994 Narine was a researcher at the Chemical Agents Factory, Institute of Applied Chemistry, Chemincor Co., Armenia. Narine has worked as a metrologist since 2006. In 2006 - 2014 she was Head of Service of Research and Metrology Support at the NMI, Quality Manager of the NMI and National Secretary of COOMET, Armenia. Since 2016 - Deputy Head of Physicochemical and Electrical Measurements Departments of All-Russian Scientific Research Institute for Physical Engineering and Radiotechnical Metrology (VNIIFTRI, Rosstandart, Russia). Dr. Oganyan is actively involved in development of various documents and recommendations in the field of metrology in chemistry and biology. Since January 2019, she have become a member of the Cooperation on International Traceability in Analytical Chemistry (CITAC).


After working in accredited laboratories as analyst and consultant for 15 years, started a research and teaching career at the University of Lisbon. Since 2002, collaborates with the Portuguese Accreditation Body, as technical assessor, and trains staff of laboratories. Ricardo is currently the secretary of CITAC, member of the executive board, chair of the working group on Qualitative Analysis and member of working group on Measurement Uncertainty and Traceability of Eurachem. He is co-editor of the Eurachem/CITAC guide for Setting the Target Measurement Uncertainty. His research interests are Metrology and Examinology in chemistry, the sciences of measurements and qualitative analysis in chemistry, respectively

Dr. Samuel Wunderli

Short description of professional development 

  • Chemistry Studies at ETH Zürich, diploma degree (dipl.chem.ETH)
  • Doctorate studies in inorganic analytical chemistry at ETH Zürich, doctor degree (, laboratory chemistry assistant for students of chemisty, of pharmacy, environmental science.
  • EMPA scientific collaborator for 17 years in three different positions: air chemistry (data mining, statistics, measurements), organic trace analysis and customer problems solving (dioxins, PCBs, PAH, etc.), chemical metrology (IDMS, IRM, pure materials)
  • METAS scientific collaborator for 10 years (reference vales for clinical chemical Measurement, chemical activity measurement and systems for ions, glucose, metrological reference measurements, etc.
  • Since 2015 owner and CEO of the scientific consulting company ’atomolmetrion GmbH’

 Some additional tasks in the professional frame above: 

  • Expert for laboratory accreditation under ISO 17025 requirements
  • Expert for CRM production under ISO 17034 requirements
  • Lecturer in analytical chemistry
  • Scientific adviser for chemical analytical metrology work
  • CITAC secretary 2010-‐2017
  • Reviewer for a number of analytical chemical journals
  • Editorial board member of ’Analytical Chemistry Insights’ (open source journal)

Dr.-Ing. Steffen Seitz

He has a degree in physics and a PhD in electrotechnical engineering. He has been working in the field of metrology in electrochemistry at PTB since 2007, becoming head of the electrochemical working group at PTB in 2015. He is mainly occupied with the optimization of existing and the development of new primary methods for electrochemical measurement quantities, like pH, electrolytic conductivity, ion activity and state of health of Li-ion battery cells; impedance spectroscopy of electrolyte solutions and Li-ion battery cells. Furthermore, He is representing PTB in several national and international institutions with respect to electrochemical measurands. Since 2019, He is chair of the Working Group for Electrochemical Analysis and Classical Chemical Methods.

Ph. D Toshiaki Asakai

Ph. D Toshiaki Asakai is a Senior Researcher of Inorganic Standards Group

(Research Institute for Material and Chemical Measurement, National Metrology Institute of Japan (NMIJ) & Standardization Promotion Center, Research and Innovation Promotion Headquarters, National Institute of Advanced Industrial Science and Technology (AIST). He is the delegate from Japan (2011−present) and deputy chair (2019−present) of the CCQM Working Group on Electrochemical Analysis and Classical Chemical Methods. He is expert for ISO/REMCO WG 6, WG 10 (ISO Guide 30), WG 13 (ISO Guide 85), WG 17, WG 18 (ISO Guide 86), and WG 19 (ISO Guide 87); secretariat of the Japanese committee for ISO/REMCO (2013−present). His Major

He has twenty-one internationally refereed scientific publications as the first author.


Prof.,Dr. Belan Boris Denisovich

Prof., Dr. Belan Boris Denisovich, Doctor of Physical and Mathematical Sciences. Head of the Laboratory of Climatology of Atmospheric Composition (LCAS) and Deputy Director for Research at the Institute of Atmospheric Optics SB RAS. Areas of scientific activity: study of long-term changes in the disperse and chemical composition of atmospheric aerosol, the concentration of greenhouse gases both in the surface layer and their vertical distribution in the troposphere; study of the laws of formation and transformation of impurity fields in the atmosphere of large industrial centers and individual regions; revealing the role of synoptic processes in changing the composition of air and its optical characteristics. Author and co-author of 380 peer-reviewed articles, including 7 monographs.

Dr. Natalya Muravskaya

Natalya Muravskaya is a doctor on Technical Sciences. She used to work as Deputy Director on Quality of VNIIOFI. She is Head of Head of the Technical committee TC 3.1 "Quality Forum" and the Technical committee TC 1.8/ SC 2  "Metals and Alloys" COOMET. More than 30 types of research on reference materials of alloy composition, more than 80 methods for measuring components in alloys by various spectral methods, including 8 reference methods, were carried out under the leadership of Dr. N. Muravskaya. She has been the honorary metrologist of the Russian Federation and the honorary metrologist of COOMET.

Dr. Markus Obkircher

Markus Obkircher is Director R&D heading Merck’s Reference Materials and Proficiency Testing division with teams in the US and Switzerland. He is responsible for the in-house development of new analytical standards and certified reference materials under ISO/IEC 17025 and ISO 17034 double accreditation. Prior to this position he was R&D Manager in Buchs, Switzerland, with a strong focus on synthesis, characterization and certification of reference materials. He joined Merck / Sigma-Aldrich eight years ago after heading the development unit for a custom API manufacturer. He completed his post-doctoral studies at Harvard in Boston, and his PhD thesis in Basel, and further holds an executive MBA degree from the University of Zurich.

Dr. Egor Sobina

Dr. Egor Sobina has been Ph.D. in Physical Chemistry area since 2009.  He began his career at UNIIM in 2004. In 2012-2017, he was the Head of the laboratory for metrological support of nano-industry, spectral methods of analysis and reference materials. Since 2017, he has been Deputy director on innovation. More than 200 methods of verification and calibration of physicochemical measuring instruments, more than 50 types of GSO – certified reference materials, as well as state standards GET 210 and GVET 196-1 have been developed under the leadership of E.P. Sobina. He is the Chairman of the TС 1.8/ SC 3 "Pure inorganic substances" COOMET. He is a reviewer of COOMET within the framework of COOMET and BIPM. He is the Head of the learning Department "Metrology of reference materials", a member of ISO/REMCO and has more than 100 publications.

Chingis Kuanbayev, BIPM, Sèvres

Mr Chingis Kuanbayev is an International Liaison Officer at the International Bureau of Weights and Measures (BIPM). He runs the BIPM Capacity Building and Knowledge Transfer (CBKT) programme, undertakes liaison activities including promotion of the international quality infrastructure, with selected international stakeholder organizations. Prior to joining the BIPM he was a representative of the Kazakhstani National Metrology Institute to several international and regional organizations on Quality Infrastructure. He is an expert on Quality Infrastructure and implementation of the CIPM MRA, and is a former JCRB Executive Secretary.

Dr. Angelique Botha

Dr Angelique Botha, chief metrologist at the NMISA, South Africa is the current chairperson of ISO/TC 334, the new ISO Technical Committee on Reference Materials.  She also serves on other national and international ISO committees responsible for the development of conformity assessment standards in the area of the competence of testing and calibration laboratories, reference material producers and proficiency testing providers, i.e., ISO/IEC 17025, ISO 17034 and ISO/IEC 17043.  She also serves on several of the working groups of the Consultative Committee for Metrology in Chemistry and Biology (CCQM) of the International Committee for Weights and Measures (CIPM).

In 1997, she joined the National Metrology Institute of South Africa (NMISA) as their first chemical metrologist, tasked with the responsibility to establish a facility for metrology in chemistry for South Africa.  After establishing the first accredited gas metrology laboratory in South Africa, she completed her PhD-studies in 2010 with a project to characterise South African geological reference materials using isotope dilution inductively coupled plasma mass spectrometry (ID-ICPMS). She then became more involved with projects in the inorganic analysis laboratory, focussing on the trace and ultra-trace analysis of toxic and nutritional elements in food and environmental matrices.

Dr Botha has published more than 20 papers on metrology in chemistry in peer-reviewed journals.  She developed and for many years presented a course on the estimation of uncertainty of measurement for analytical chemists for the National Laboratory Association of South Africa (NLA).  She is also qualified as a technical assessor to assist with assessments to ISO/IEC 17025 and ISO 17034 for the South African National Accreditation System (SANAS) and performs peer reviews for other international accreditation bodies.

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