Tyler B. Coplen
YOU?
Author Swipe
View article: Stable Isotope Reference Materials and Scale Definitions—Outcomes of the 2024 IAEA Experts Meeting
Stable Isotope Reference Materials and Scale Definitions—Outcomes of the 2024 IAEA Experts Meeting Open
The participants of the 12 th International Atomic Energy Agency (IAEA) meeting on stable isotope reference materials reached a consensus, acknowledging the existence and use of two carbon isotope delta scales: the VPDB (Vienna Peedee bele…
View article: Geographic determination of Pinus ponderosa using DART TOFMS, ICP-MS, and LIBS handheld analyzer
Geographic determination of Pinus ponderosa using DART TOFMS, ICP-MS, and LIBS handheld analyzer Open
Due to legal requirements on international imports, it is important for law enforcement and regulatory agencies to identify the geographical provenance of timber. Current methods for geographic identification utilize data generated by dire…
View article: Geographic determination data for southern Oregon Pinus ponderosa using DART TOFMS, ICP-MS, and LIBS handheld analyzer
Geographic determination data for southern Oregon Pinus ponderosa using DART TOFMS, ICP-MS, and LIBS handheld analyzer Open
This data publication contains analytical data from direct analysis in real time time-of-flight mass spectrometry (DART TOFMS), inductively coupled plasma mass spectrometry (ICP-MS), and handheld laser-induced breakdown spectroscopy (LIBS)…
View article: Using stable oxygen isotope dual‐inlet isotope‐ratio mass spectrometry to elucidate uranium transport and mixed <sup>230</sup>Th/U calcite formation ages at the seminal Devils Hole, Nevada, natural laboratory
Using stable oxygen isotope dual‐inlet isotope‐ratio mass spectrometry to elucidate uranium transport and mixed <sup>230</sup>Th/U calcite formation ages at the seminal Devils Hole, Nevada, natural laboratory Open
Rationale Vein calcite in Devils Hole has been precipitating continuously in oxygen‐isotope equilibrium at a constant temperature for over 500 000 years, providing an unmatched δ 18 O paleoclimate time series. A substantial issue is that c…
View article: Minimum requirements for publishing hydrogen, carbon, nitrogen, oxygen and sulfur stable-isotope delta results (IUPAC Technical Report)
Minimum requirements for publishing hydrogen, carbon, nitrogen, oxygen and sulfur stable-isotope delta results (IUPAC Technical Report) Open
Stable hydrogen, carbon, nitrogen, oxygen and sulfur (HCNOS) isotope compositions expressed as isotope-delta values are typically reported relative to international standards such as Vienna Standard Mean Ocean Water (VSMOW), Vienna Peedee …
View article: Code and user guide for Equilibrated gas and carbonate standard-derived dual (Δ47 and Δ48) clumped isotope values
Code and user guide for Equilibrated gas and carbonate standard-derived dual (Δ47 and Δ48) clumped isotope values Open
Code to accompany Equilibrated gas and carbonate standard-derived dual (Δ47 and Δ48) clumped isotope values The R script findcutpoints.R contains the functions that should be loaded into memory ahead of data quality control. Analyses_Lucar…
View article: Equilibrated gas and carbonate standard-derived dual (Δ47 and Δ48) clumped isotope values
Equilibrated gas and carbonate standard-derived dual (Δ47 and Δ48) clumped isotope values Open
Carbonate clumped isotope geochemistry has primarily focused on mass spectrometric determination of m/z 47 CO2 for geothermometry, but theoretical calculations and recent experiments indicate paired analysis of the m/z 47 (13C18O16O) and m…
View article: Equilibrated Gas and Carbonate Standard‐Derived Dual (Δ<sub>47</sub> and Δ<sub>48</sub>) Clumped Isotope Values
Equilibrated Gas and Carbonate Standard‐Derived Dual (Δ<sub>47</sub> and Δ<sub>48</sub>) Clumped Isotope Values Open
Carbonate clumped isotope geochemistry has primarily focused on mass spectrometric determination of m/z 47 CO 2 for geothermometry, but theoretical calculations and recent experiments indicate paired analysis of the m/z 47 ( 13 C 18 O 16 O…
View article: Standard atomic weights of the elements 2021 (IUPAC Technical Report)
Standard atomic weights of the elements 2021 (IUPAC Technical Report) Open
Following the reviews of atomic-weight determinations and other cognate data in 2015, 2017, 2019 and 2021, the IUPAC (International Union of Pure and Applied Chemistry) Commission on Isotopic Abundances and Atomic Weights (CIAAW) reports c…
View article: Equilibrated gas and carbonate standard-derived paired clumped isotope (Δ47 and Δ48) values on the absolute reference frame
Equilibrated gas and carbonate standard-derived paired clumped isotope (Δ47 and Δ48) values on the absolute reference frame Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at G-Cubed. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints pr…
View article: Devils Hole Calcite Was Precipitated at ±1°C Stable Aquifer Temperatures During the Last Half Million Years
Devils Hole Calcite Was Precipitated at ±1°C Stable Aquifer Temperatures During the Last Half Million Years Open
Subaqueous carbonates from the Devils Hole caves (southwestern USA) provide a continuous Holocene to Pleistocene North American paleoclimate record. The accuracy of this record relies on two assumptions: That carbonates precipitated close …
View article: Supplementary Data to Devils Hole calcite was precipitated at ±1 °C stable aquifer temperatures during the last half million years
Supplementary Data to Devils Hole calcite was precipitated at ±1 °C stable aquifer temperatures during the last half million years Open
In this dataset, we provide analytical data to Devils Hole calcite was precipitated at ±1 °C stable aquifer temperatures during the last half million years by Bajnai et al. (2021). Also deposited here is the R code that was used to generat…
View article: Supplementary Data to Devils Hole calcite was precipitated at ±1 °C stable aquifer temperatures during the last half million years
Supplementary Data to Devils Hole calcite was precipitated at ±1 °C stable aquifer temperatures during the last half million years Open
In this dataset, we provide analytical data to Devils Hole calcite was precipitated at ±1 °C stable aquifer temperatures during the last half million years by Bajnai et al. (2021). Also deposited here is the R code that was used to generat…
View article: USGS44, a new high‐purity calcium carbonate reference material for <i>δ</i> <sup>13</sup> C measurements
USGS44, a new high‐purity calcium carbonate reference material for <i>δ</i> <sup>13</sup> C measurements Open
Rationale The stable carbon isotopic ( δ 13 C) reference material (RM) LSVEC Li 2 CO 3 has been found to be unsuitable for δ 13 C standardization work because its δ 13 C value increases with exposure to atmospheric CO 2 . A new CaCO 3 RM, …
View article: Variation of lead isotopic composition and atomic weight in terrestrial materials (IUPAC Technical Report)
Variation of lead isotopic composition and atomic weight in terrestrial materials (IUPAC Technical Report) Open
The isotopic composition and atomic weight of lead are variable in terrestrial materials because its three heaviest stable isotopes are stable end-products of the radioactive decay of uranium ( 238 U to 206 Pb; 235 U to 207 Pb) and thorium…
View article: Supplementary Data to Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures
Supplementary Data to Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures Open
In this dataset, we provide analytical and model data to Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures by Bajnai et al. (2020). Also deposited here is the R code that we used to calculate the …
View article: Supplementary Data to Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures
Supplementary Data to Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures Open
In this dataset, we provide analytical and model data to Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures by Bajnai et al. (2020). Also deposited here is the R code that we used to calculate the …
View article: The Table of Standard Atomic Weights—An exercise in consensus
The Table of Standard Atomic Weights—An exercise in consensus Open
The present Table of Standard Atomic Weights (TSAW) of the elements is perhaps one of the most familiar data sets in science. Unlike most parameters in physical science whose values and uncertainties are evaluated using the “Guide to the E…
View article: Upcoming food matrix stable isotope reference materials from the USGS: honeys, vegetable oils, flours, and collagens
Upcoming food matrix stable isotope reference materials from the USGS: honeys, vegetable oils, flours, and collagens Open
<p>An international project developed, quality-tested, and measured isotope&#8722;delta values of 10 new food matrix reference materials (RMs) for hydrogen, carbon, nitrogen, oxygen, and sulfur stable isotope-ratio measurements t…
View article: Combined clumped isotope measurements resolve kinetic biases in carbonate formation temperatures
Combined clumped isotope measurements resolve kinetic biases in carbonate formation temperatures Open
<p>Reaction kinetics involved in the precipitation of carbonates can introduce large scatter and inaccuracies in the temperatures derived from their <em>&#948;</em><sup>18</sup>O and &#8710;<sub>…
View article: Isotopes Matter
Isotopes Matter Open
Two years ago, the King’s Centre for Visualization in Science (KCVS) at The King’s University, Edmonton released a new digital interactive version of the IUPAC Periodic Table of the Elements and Isotopes with accompanying educational resou…
View article: Erratum to: Isotope-abundance variations and atomic weights of selected elements: 2016 (IUPAC Technical Report)
Erratum to: Isotope-abundance variations and atomic weights of selected elements: 2016 (IUPAC Technical Report) Open
The following errors appeared in the Technical Report [1] published in Pure and Applied Chemistry in 2017: p. 1210: The lower bound of the 10 3 δ 30 Si NBS28 value of "Quartz sandstones" in Fig. 8 should be -7.5 instead of -5.7.p. 1217: Th…
View article: IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community (IUPAC Technical Report)
IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community (IUPAC Technical Report) Open
The IUPAC (International Union of Pure and Applied Chemistry) Periodic Table of the Elements and Isotopes (IPTEI) was created to familiarize students, teachers, and non-professionals with the existence and importance of isotopes of the che…
View article: Preliminary assessment of stable nitrogen and oxygen isotopic composition of USGS51 and USGS52 nitrous oxide reference gases and perspectives on calibration needs
Preliminary assessment of stable nitrogen and oxygen isotopic composition of USGS51 and USGS52 nitrous oxide reference gases and perspectives on calibration needs Open
In this paper, 1 Tables 2 and3 should have appeared as below: TABLE 2 Interlaboratory comparison of USGS51 and USGS52 N 2 O isotopic measurements.Individual laboratory uncertainties are standard deviations of minimum of three repeated meas…
View article: Clarification of the term “normal material” used for standard atomic weights (IUPAC Technical Report)
Clarification of the term “normal material” used for standard atomic weights (IUPAC Technical Report) Open
The standard atomic weights of the elements apply to normal materials. Since 1984, the Commission on Isotopic Abundances and Atomic Weights (Commission) has defined a normal material as: “The material is a reasonably possible source for th…