Results 261 to 270 of about 154,472 (297)

Isotopic Analysis of Atmospheric Formaldehyde by Gas Chromatography Isotope Ratio Mass Spectrometry

Analytical Chemistry, 2006
Little is known about the isotopic composition of formaldehyde in the atmosphere, a chemical intermediate in hydrocarbon oxidation. Here, we present a promising new method to analyze the carbon (delta 13C) and hydrogen (delta D) isotopic composition of atmospheric formaldehyde. The direct isotopic analytical technique described uses continuous-flow gas
Andrew L, Rice, Paul D, Quay
openaire   +2 more sources

Determination of Bromine Stable Isotopes Using Continuous-Flow Isotope Ratio Mass Spectrometry

Analytical Chemistry, 2005
A new methodology for bromine stable isotope determination by continuous-flow isotope ratio mass spectrometry (CF-IRMS) was developed. The technique was tested on inorganic samples. Inorganic bromide was precipitated in the form of silver bromide by using silver nitrate in a standard methodology.
Orfan, Shouakar-Stash, Shaun K, Frape, Robert J, Drimmie   +2 more
openaire   +2 more sources

Memory effects in combining isotope ratio monitoring with isotope dilution mass spectrometry

Rapid Communications in Mass Spectrometry, 1999
Combining isotope ratio monitoring with isotope dilution techniques provides very accurate results in the quantitative analysis of volatile organic chemical compounds by gas chromatography/mass spectrometry (GC/MS). However, this method requires that spikes highly enriched in (13)C be used.
, Dube, , Henrion, , Ohlendorf
openaire   +2 more sources

Isotope ratio measurements using glow discharge mass spectrometry

International Journal of Mass Spectrometry and Ion Processes, 1995
Abstract Glow discharge mass spectrometry (GDMS) has been evaluated for its ability to measure isotope ratios in solids. Isotope ratios were measured for B, Cu, Sr, Ag, Sb, Re and Pb in concentrations ranging from 15 ppm to pure metal. External precision of better than 0.03% has been achieved for isotope ratios measured using pure solid elemental ...
Lee R. Riciputi, D.C. Duckworth, C.M. Barshick, David H. Smith   +3 more
openaire   +1 more source

Isotope ratio mass spectrometry – history and terminology in brief

Drug Testing and Analysis, 2012
The history of isotope ratio mass spectrometry (IRMS) is briefly described. It is shown that the fundamental design of isotope ratio mass spectrometers has not changed since the 1940s. The basic findings concerning the natural variation of isotope abundances even date back to the 1930s.
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Isotope Ratio Studies Using Mass Spectrometry

1999
Wieser, M., Brand, W.
openaire   +3 more sources

Liquid Chromatography coupled to Isotope Ratio Mass Spectrometry (LC-IRMS): A review

TrAC - Trends in Analytical Chemistry, 2022
Matteo Perini, Luana Bontempo
exaly  

ForensicApplications of Isotope Ratio Mass Spectrometry

2003
Meier-Augenstein, Wolfram, Liu, R.H.
openaire   +2 more sources

Applications of Charge Detection Mass Spectrometry in Molecular Biology and Biotechnology

Chemical Reviews, 2022
Martin F Jarrold
exaly  

Reference materials by isotope ratio mass spectrometry

Mass Spectrometry Reviews, 1993
Paul De Bièvre, John R. De Laeter, H. Steffen Peiser, William P. Reed   +3 more
openaire   +1 more source