Publications
Many more publications using stable isotopes can be found on the USGS profile pages of the following RSIL members: J.K. Bohlke, Tyler B. Coplen, Karl B. Haase, and Haiping Qi. You can access their staff profiles from the RSIL Connect page.
Filter Total Items: 19
Determination of the δ34S of sulfate in water; RSIL lab code 1951
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 1951 is to determine the δ(34S/32S), abbreviated as δ34S, of dissolved sulfate. Dissolved sulfate is collected in the field and precipitated with BaCl2 at pH 3 to 4 as BaSO4 in the laboratory. However, the dissolved organic sulfur (DOS) is oxidized to SO2, and the carbonate is acidified to CO2. Both are degassed from the water sam
Authors
Kinga Revesz, Haiping Qi, Tyler B. Coplen
Determination of the δ34S of low-concentration sulfate in water; RSIL lab code 1949
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 1949 is to determine the δ(34S/32S), abbreviated as δ34S, of dissolved sulfate having a concentration less than 20 milligrams per liter. Dissolved sulfate is collected on an anion-exchange resin in the field, eluted in the laboratory with 3 M KCl, and precipitated with BaCl2 at pH 3 to 4 as BaSO4. The precipitated BaSO4 is filtere
Authors
Kinga Revesz, Haiping Qi, Tyler B. Coplen
Determination of the δ15N and δ13C of total nitrogen and carbon in solids; RSIL lab code 1832
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 1832 is to determine the δ(15N/14N), abbreviated as δ15N, and the δ(13C/12C), abbreviated as δ13C, of total nitrogen and carbon in a solid sample. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total nitrogen and carbon in a solid sample into N2 and CO2 gas. The EA is connected to a continuous flow isotope-rat
Authors
Kinga Revesz, Haiping Qi, Tyler B. Coplan
Determination of the δ15N of total nitrogen in solids; RSIL lab code 2893
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 2893 is to determine the δ(15N/14N), abbreviated as δ15N , of total nitrogen in solid samples. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total nitrogen in a solid sample into N2 gas. The EA is connected to a continuous flow isotope-ratio mass spectrometer (CF-IRMS), which determines relative difference in the
Authors
Kinga Revesz, Haiping Qi, Tyler B. Coplen
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 in stable
Authors
Kinga Revesz, Tyler B. Coplen
Stable hydrogen and oxygen isotope ratios for selected sites of the National Oceanic and Atmospheric Administration's Atmospheric Integrated Research Monitoring Network (AIRMoN)
Increasingly, hydrologic studies require information on the isotopic composition of natural waters. This report presents stable hydrogen (δ2H) and oxygen isotope ratios (δ180) of precipitation samples from seven selected sites of the National Oceanic and Atmospheric Administration's Atmospheric Integrated Research Monitoring Network (AIRMoN) collected during the years 1992-1994.
Authors
Tyler B. Coplen, Richard Huang