Dr. Tyler B. Coplen

• Subcommittee on Natural Assessment of Fundamental Understanding of Isotopes (Secretary)
• Subcommittee on Stable Isotope Reference Material Assessment (Member)
• Subcommittee on Isotopic Abundance Measurements (Member)

• member: Project No. 2011-027-1-200: Evaluated Published Isotope Ratio Data (2011-2013)
• member: Project No. 2009-029-1-200: Evaluated Published Isotope Ratio Data (2010-2011)
• member: Project No. 2009-027-1-200: Assessment of Stable Isotopic Reference and Inter-Comparison Materials
• member: Project No. 2009-025-1-200: Technical Guidelines for Isotope Abundances and Atomic Weight Measurements
• member: Project No. 2007-038-3-200: Development of an isotopic periodic table for the educational community
• member: Project No. 2007-028-1-200: Evaluated published isotope ratio data (2007-2009)
• member: Project No. 2006-025-1-200: Assessment of fundamental understanding of isotopic abundances and atomic weights of the chemical elements
• member: Project No. 2005-027-1-200: Evaluated published isotope ratio data (2005-2007)
• chairman: Project No. 2005-022-1-200: Calibration of organic and inorganic oxygen-bearing isotopic reference materials
• member: Project No. 2003-033-1-200: Determination of atomic weights using new analytical techniques
• member: Project No. 2003-031-2-200: Isotopic compositions of selected elements
• member: Project No. 2002-049-2-200: A new comprehensive report on the isotopic compositions of the elements for global user communities
• member: Project No. 2001-019-2-200: Guidelines for mass spectrometric isotope ratio measurements