Results 21 to 30 of about 157,168 (328)

Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane [PDF]

open access: yesAtmospheric Measurement Techniques, 2010
We describe a continuous-flow isotope ratio mass spectrometry (CF-IRMS) technique for high-precision &delta;D and &delta;<sup>13</sup>C measurements of atmospheric methane on 40 mL air samples.
M. Brass, T. Röckmann
doaj   +1 more source

Precise Measurement of Tellurium Isotope Ratios in Terrestrial Standards Using a Multiple Collector Inductively Coupled Plasma Mass Spectrometry

open access: yesMolecules, 2020
Precise tellurium (Te) isotope ratio measurement using mass spectrometry is a challenging task for many decades. In this paper, Te isotope ratio measurements using multi-collector inductively coupled plasma mass spectrometry (MC–ICP–MS) in terrestrial Te
Rajamanickam Murugan   +2 more
doaj   +1 more source

Isotope Calculation Gadgets: A Series of Software for Isotope-Tracing Experiments in Garuda Platform

open access: yesMetabolites, 2022
Isotope tracing is a powerful technique for elucidating intracellular metabolism. Experiments utilizing this technique involve various processes, such as the correction of natural isotopes.
Nobuyuki Okahashi   +3 more
doaj   +1 more source

An analytical system for stable isotope analysis on carbon monoxide using continuous-flow isotope-ratio mass spectrometry [PDF]

open access: yesAtmospheric Measurement Techniques, 2015
A fully automated system for the determination of δ13C and δ18O in atmospheric CO has been developed. CO is extracted from an air sample and converted into carbon dioxide (CO2) using the Schütze reagent.
S. L. Pathirana   +3 more
doaj   +1 more source

Recent advances in the application of stable isotope ratio analysis in forensic chemistry [PDF]

open access: yes, 2010
This review paper updates the previous literature in relation to the continued and developing use of stable isotope ratio analysis in samples which are relevant to forensic science.
Benson   +40 more
core   +1 more source

Pyrolysis-gas chromatography–isotope ratio mass spectrometry of polyethylene [PDF]

open access: yesJournal of Chromatography A, 2015
Polyethylene is probably the most used plastic material in daily life and its accurate analysis is of importance. In this communication the chemical structure of polyethylenes is studied in detail using conventional analytical pyrolysis (Py-GC/MS), bulk stable isotopic analysis (IRMS) and pyrolysis compound specific stable isotopic analysis (Py-CSIA ...
González-Pérez, José Antonio   +4 more
openaire   +3 more sources

Stable Carbon Isotope Ratio (δ13C) Measurement of Graphite Using EA-IRMS System

open access: yesMedžiagotyra, 2015
δ13C values in non-irradiated natural graphite were measured. The measurements were carried out using an elemental analyzer combined with stable isotope ratio mass spectrometer (EA-IRMS). The samples were prepared with ground and non-ground graphite, the
Andrius Garbaras   +2 more
doaj   +1 more source

Measurement of calcium isotopes (δ44Ca) using a multicollector TIMS technique [PDF]

open access: yes, 2002
We propose a new“multicollector technique” for the thermal ionization mass spectrometer (TIMS) measurement of calcium (Ca) isotope ratios improving average internal statistical uncertainty of the 44Ca/40Ca measurements by a factor of 2–4 and average ...
Bock, Barbara   +5 more
core   +1 more source

Method for the determination of concentration and stable carbon isotope ratios of atmospheric phenols [PDF]

open access: yesAtmospheric Measurement Techniques, 2013
A method for the determination of the stable carbon isotopic composition of atmospheric nitrophenols in the gas and particulate phases is presented. It has been proposed to use the combination of concentration and isotope ratio measurements of precursor ...
M. Saccon   +7 more
doaj   +1 more source

Measurement and validation of uranium isotope ratio in uranium ore for isotopic fingerprinting

open access: yesRadiation Protection and Environment, 2017
Accurate determination of uranium isotope ratio can act as an efficient fingerprint in the nuclear forensics to identify source and intended use of illicit trafficking of uranium material. In this context, a rapid chemical separation technique to isolate
Suchismita Mishra   +3 more
doaj   +1 more source

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