Tables supporting optimization of on-line hydrogen stable isotope-ratio measurements of halogen- and sulfur-bearing organic compounds using elemental analyzer-chromium/high-temperature conversion-isotope-ratio mass spectrometry

Tabular data demonstrates the performance of a modified reactor setup that enables high-quality hydrogen isotopic analysis of halogen- and sulfur-bearing organics with a modified elemental analyzer–chromium/high temperature conversion reactor that demonstrated an overall hydrogen-recovery of higher than 96 percent. These data support the article by Matthias Gehre, Julian Renpenning, Heike Geilmann, Haiping Qi, Tyler B. Coplen, Steffen Kümmel, Natalija Ivdra, Willi A. Brand, and Arndt Schimmelmann titled "Optimization of on-line hydrogen stable isotope-ratio measurements of halogen- and sulfur-bearing organic compounds using elemental analyzer-chromium/high-temperature conversion-isotope-ratio mass spectrometry (EA–Cr/HTC–IRMS)"...

Categories: Data; Tags: NA, USGS Science Data Catalog (SDC), chromium, isotopic abundances

Tables and charts for isotope-abundance variations and atomic weights of selected elements: 2016 (Ver. 1.1, May 2018)

Twelve chemical elements have intervals for their standard atomic weights, namely hydrogen, lithium, boron, carbon, nitrogen, oxygen, magnesium, silicon, sulfur, chlorine, bromine and thallium. Isotopic abundances, isotope-delta values, and atomic weights for each of the lower and upper bounds of materials and compounds of these 12 elements are tabulated. Version 1.1 is the most current version.

Categories: Data, Data Release - Revised; Tags: NA, USGS Science Data Catalog (SDC), atomic weights, isotopic abundances