Item talk:Q45470
From geokb
{
"USGS Staff Profile": { "@context": "https://schema.org", "@type": "Person", "dateModified": "2024-09-21T07:55:51.361953", "name": "Tyler B. 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Coplen is an ST scientist in geochemistry. His research focuses on isotope hydrology, development of innovative analytical techniques for isotopic analysis of light elements, provides forensic-quality analytical services to USGS programs, and creates isotopic reference materials for calibration of mass spectrometers and laser absorption spectrometers in isotope laboratories worldwide. In 1974, he joined the U.S. Geological Survey, and in 1978, he set up the Reston Stable Isotope Laboratory, please visit the Reston Stable Isotope Laboratory website. He set up and led the Subcommittee on Natural Isotopic Fractionation (1985\u20132002) of the International Union of Pure and Applied Chemistry (IUPAC) that resulted in a dozen elements being assigned standard atomic-weight values that are intervals, instead of single values, to indicate that atomic-weight values of many elements are not constants of nature." } ], "email": "tbcoplen@usgs.gov", "url": "https://www.usgs.gov/staff-profiles/tyler-b-coplen", "affiliation": [ { "@type": "Organization", "name": "Honorary Member, Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry" } ], "hasCredential": [ { "@type": "EducationalOccupationalCredential", "name": "Ph.D. 1970, University of Chicago, Department of Geophysical Sciences, Advisor: Prof. Robert N. 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