Tyler B. Coplen, Ph.D.
Dr. Tyler Coplen is the Director of the Reston Stable Isotope Laboratory of the USGS Water Resources Mission Area.
Tyler B. 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 (1985–2002) 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.
Professional Experience
Assistant Research Geochemist, University of California, Riverside 1970–1974
Education and Certifications
Ph.D. 1970, University of Chicago, Department of Geophysical Sciences, Advisor: Prof. Robert N. Clayton
M.S. 1968, University of Chicago, Department of Geophysical Sciences
B.S. 1966, Pacific Lutheran University, Major: Physics
Affiliations and Memberships*
Honorary Member, Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry
Science and Products
Filter Total Items: 18
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Filter Total Items: 153
Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800 Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800
The purpose of Reston Stable Isotope Laboratory Lab (RSIL) Code 1800 is to determine the δ(34S/32S), abbreviated as δ34S, of total sulfur in a solid sample. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total sulfur in a solid sample into SO2 gas. The EA is connected to a continuous flow isotope-ratio mass spectrometer (CF-IRMS), which determines the relative difference...
Authors
Kinga Revesz, Tyler Coplen
Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios in a riverbank filtration study, Platte River, Nebraska, 2002 to 2005, Volume 2 Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios in a riverbank filtration study, Platte River, Nebraska, 2002 to 2005, Volume 2
This document is the second volume of a data series report that describes the data collected during a study conducted during 2001 through 2005 by the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency and the City of Lincoln, at an established riverbank-filtration well field with horizontal collector wells and vertical wells. The data were collected as...
Authors
J. Vogel, L. Barber, E. T. Furlong, T.B. Coplen, Ingrid M. Verstraeten, M. Meyer
Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios, in a riverbank filtration study, Platte River, Nebraska, 2001 to 2003, Volume 1 Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios, in a riverbank filtration study, Platte River, Nebraska, 2001 to 2003, Volume 1
Although studied extensively in recent years in Europe, the occurrence of endocrine disrupters and other organic wastewater compounds in the environment in the United States is not well documented. To better understand the efficiency of riverbank filtration with respect to endocrine disrupting compounds and to evaluate the use of riverbank filtration as an effective means of drinking...
Authors
J. Vogel, Ingrid M. Verstraeten, T.B. Coplen, E. T. Furlong, M. Meyer, L. Barber
Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004 Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004
No abstract available.
Authors
J. Vogel, S.I. Harris, T.B. Coplen, E.W. Rice, Ingrid M. Verstraeten
Investigating surface water-well interaction using stable isotope ratios of water Investigating surface water-well interaction using stable isotope ratios of water
Because surface water can be a source of undesirable water quality in a drinking water well, an understanding of the amount of surface water and its travel time to the well is needed to assess a well's vulnerability. Stable isotope ratios of oxygen in river water at the City of La Crosse, Wisconsin, show peak-to-peak seasonal variation greater than 4‰ in 2001 and 2002. This seasonal...
Authors
R. Hunt, T.B. Coplen, N.L. Haas, D. Saad, M. A. Borchardt
Using dual-bacterial denitrification to improve δ15N determinations of nitrates containing mass-independent 17O Using dual-bacterial denitrification to improve δ15N determinations of nitrates containing mass-independent 17O
The bacterial denitrification method for isotopic analysis of nitrate using N2O generated from Pseudomonas aureofaciens may overestimate δ15N values by as much as 1–2‰ for samples containing atmospheric nitrate because of mass-independent 17O variations in such samples. By analyzing such samples for δ15N and δ18O using the denitrifier Pseudomonas chlororaphis, one obtains nearly correct...
Authors
Tyler Coplen, J.K. Bohlke, Karen Casciotti
Science and Products
Filter Total Items: 18
No Result Found
Filter Total Items: 153
Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800 Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800
The purpose of Reston Stable Isotope Laboratory Lab (RSIL) Code 1800 is to determine the δ(34S/32S), abbreviated as δ34S, of total sulfur in a solid sample. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total sulfur in a solid sample into SO2 gas. The EA is connected to a continuous flow isotope-ratio mass spectrometer (CF-IRMS), which determines the relative difference...
Authors
Kinga Revesz, Tyler Coplen
Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios in a riverbank filtration study, Platte River, Nebraska, 2002 to 2005, Volume 2 Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios in a riverbank filtration study, Platte River, Nebraska, 2002 to 2005, Volume 2
This document is the second volume of a data series report that describes the data collected during a study conducted during 2001 through 2005 by the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency and the City of Lincoln, at an established riverbank-filtration well field with horizontal collector wells and vertical wells. The data were collected as...
Authors
J. Vogel, L. Barber, E. T. Furlong, T.B. Coplen, Ingrid M. Verstraeten, M. Meyer
Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios, in a riverbank filtration study, Platte River, Nebraska, 2001 to 2003, Volume 1 Occurrence of selected pharmaceutical and non-pharmaceutical compounds, and stable hydrogen and oxygen isotope ratios, in a riverbank filtration study, Platte River, Nebraska, 2001 to 2003, Volume 1
Although studied extensively in recent years in Europe, the occurrence of endocrine disrupters and other organic wastewater compounds in the environment in the United States is not well documented. To better understand the efficiency of riverbank filtration with respect to endocrine disrupting compounds and to evaluate the use of riverbank filtration as an effective means of drinking...
Authors
J. Vogel, Ingrid M. Verstraeten, T.B. Coplen, E. T. Furlong, M. Meyer, L. Barber
Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004 Microbe concentrations, laser particle counts, and stable hydrogen and oxygen isotope ratios in samples from a riverbank filtration study, Platte River, Nebraska, 2002 to 2004
No abstract available.
Authors
J. Vogel, S.I. Harris, T.B. Coplen, E.W. Rice, Ingrid M. Verstraeten
Investigating surface water-well interaction using stable isotope ratios of water Investigating surface water-well interaction using stable isotope ratios of water
Because surface water can be a source of undesirable water quality in a drinking water well, an understanding of the amount of surface water and its travel time to the well is needed to assess a well's vulnerability. Stable isotope ratios of oxygen in river water at the City of La Crosse, Wisconsin, show peak-to-peak seasonal variation greater than 4‰ in 2001 and 2002. This seasonal...
Authors
R. Hunt, T.B. Coplen, N.L. Haas, D. Saad, M. A. Borchardt
Using dual-bacterial denitrification to improve δ15N determinations of nitrates containing mass-independent 17O Using dual-bacterial denitrification to improve δ15N determinations of nitrates containing mass-independent 17O
The bacterial denitrification method for isotopic analysis of nitrate using N2O generated from Pseudomonas aureofaciens may overestimate δ15N values by as much as 1–2‰ for samples containing atmospheric nitrate because of mass-independent 17O variations in such samples. By analyzing such samples for δ15N and δ18O using the denitrifier Pseudomonas chlororaphis, one obtains nearly correct...
Authors
Tyler Coplen, J.K. Bohlke, Karen Casciotti
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government