Results 31 to 40 of about 35,305 (286)

Combustion and Pyrolysis EA-IRMS Techniques to Determine the δ²H of Diamonds. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon‐bearing fluids or melts with the surrounding deep lithology. Most knowledge about the formation of diamonds comes from studying their mineral inclusions or stable isotopes.
Fourel F, Lécuyer C, Thomassot E, Deloule E, Ojeimi C.   +4 more
europepmc   +2 more sources

Determination of δ13C of Trace Hydrocarbons in Natural Gas Using Syringe Solid Phase Extraction (SSPE) Coupled with Gas Chromatography/Isotope Ratio Mass Spectrometry (GC/IRMS)

Geofluids, 2019
Sample preparation technique, for the analysis of δ13C ratios in oil and gas samples, has gradually been recognized as one of the most crucial steps of the whole analytical process.
Cancan Yan, Zhongping Li, Shutong Li, Zuodong Wang, Lantian Xing, Yan Liu, Weiwei Mou, Kaiwen Wang   +7 more
doaj   +1 more source

Compound specific isotope analysis (CSIA) of phthalates and non-targeted isotope analysis (NTIA) of SPE-extractable organic carbon in dilute aquatic environments

Environmental Advances, 2021
Isotope ratio analysis of total organic carbon (TOC) is well-established for the study of rivers, lakes, and oceans. Similarly, these aquatic systems are routinely surveyed to quantify natural and anthropogenic organic compounds and pollutants, including
Marcin Fiedziukiewicz, Quentin Hanley
doaj   +1 more source

Compound-Specific δ^(34)S Analysis of Volatile Organics by Coupled GC/Multicollector-ICPMS [PDF]

, 2009
We have developed a highly sensitive and robust method for the analysis of δ^(34)S in individual organic compounds by coupled gas chromatography (GC) and multicollector inductively coupled plasma mass spectrometry (MC-ICPMS).
Adkins, Jess F., Amrani, Alon, Sessions, Alex L.   +2 more
core   +1 more source

Isotope ratio mass spectrometry application for environmental investigations [PDF]

E3S Web of Conferences, 2019
Stable isotope ratio mass spectrometry (IRMS) is a useful technique with a broad range of applications. Stable isotopes are important indicators of environmental changes (including climate), and can be used to explain the functioning of biogeochemical ...
Simonova Galina, Kalashnikova Daria
doaj   +1 more source

Intercomparison of soil pore water extraction methods for stable isotope analysis [PDF]

, 2016
Funded by NSERC Discovery Grant U.S. Forest Service U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy, Bioenergy Technologies OfficePeer ...
McDonnell, Jeffery J., Orlowski, Natalie, Pratt, Dylan L.   +2 more
core   +1 more source

Development of a new method for hydrogen isotope analysis of trace hydrocarbons in natural gas samples

Journal of Natural Gas Geoscience, 2016
A new method had been developed for the analysis of hydrogen isotopic composition of trace hydrocarbons in natural gas samples by using solid phase microextraction (SPME) combined with gas chromatography-isotope ratio mass spectrometry (GC/IRMS). In this
Xibin Wang, Zhongping Li, Lantian Xing, Mingjie Zhang, Yan Liu, Chunhui Cao, Liwu Li   +6 more
doaj   +1 more source

The ALHAMBRA Survey: Bayesian Photometric Redshifts with 23 bands for 3 squared degrees [PDF]

, 2014
The ALHAMBRA (Advance Large Homogeneous Area Medium Band Redshift Astronomical) survey has observed 8 different regions of the sky, including sections of the COSMOS, DEEP2, ELAIS, GOODS-N, SDSS and Groth fields using a new photometric system with 20 ...
Aguerri, J. A. L., Alfaro, E., Aparicio-Villegas, T., Arnalte-Mur, P., Ascaso, B., Benítez, N., Broadhurst, T., Cabrera-Caño, J., Cenarro, J., Cepa, J., Cerviño, M., Coe, D., Cristóbal-Hornillos, D., Del Olmo, A., Díaz-García, L., Fernandez-Soto, A., González, R., Huertas-Company, M., Husillos, C., Infante, L., Jiménez-Teja, Y., Lopez-Sanjuan, C., Martinez, V., Masegosa, J., Matute, I., Moles, M., Molino, A., Márquez, I., Perea, J., Pović, M., Prada, F., Quintana, J., Schoenell, W., Stéfanon, M., Varela, J.   +34 more
core   +3 more sources

An Improved Cr-EA-IRMS Method for the Effective Determination of the Hydrogen Isotopes in Coal Samples

Frontiers in Chemistry, 2022
Hydrogen isotope analysis of coal is an important tool in the geochemical analysis of coal. The traditional method of hydrogen isotope analysis of coal requires the oxidation of organic matter bound hydrogen in coal to water by an oxidizing agent and ...
Hongwei Li, Hongwei Li, Lianjun Feng, Lianjun Feng   +3 more
doaj   +1 more source

Numerical studies of the 2 and 3D gauge glass at low temperature

, 2003
We report results from Monte Carlo simulations of the two- and three-dimensional gauge glass at low temperature using parallel tempering Monte Carlo. In two dimensions, we find strong evidence for a zero-temperature transition.
Choi M. Y., Cieplak M., Gingras M. J. P., Granato E., Helmut G. Katzgraber, Hyman R. A., Katzgraber H. G., Kim B. J., Kosterlitz J. M., Kosterlitz J. M., Maucourt J., Moore M. A., Olson T., Reger J. D.   +13 more
core   +1 more source