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Comparison of water isotope analysis between cavity ring-down spectroscopy and isotope ratio mass spectrometry
oxygen isotopes hydrogen isotopes water isotope ratio mass spectrometry (IRMS) cavity ring-down spectroscopy (CRDS)
2017/4/10
δD and δ18O of natural waters with δ18O ranging from –24 to –6‰ were measured using a cavity ring-down spectroscopy
(CRDS) in order to confirm that the CRDS method can be an alternative to convention...
Stable chlorine isotope ratio analysis of subnanomolar level methyl chloride by continuous-flow isotope ratio mass spectrometry
stable chlorine isotope ratio continuous flow isotope ratio mass spectrometry methyl chloride
2017/4/11
An analytical system using continuous-flow isotope ratio mass spectrometry (CF-IRMS) was developed to determine
the stable chlorine isotope ratios (δ37Cl) for CH3Cl. By using appropriate devices for ...
New sequential separation procedure for Sr, Nd and Pb isotope ratio measurement in geological material using MC-ICP-MS and TIMS
Sr Nd isotope ratio MC-ICP-MS TIMS
2017/8/10
A new 3-step sequential separation chemistry for Sr, Nd and Pb from silicate samples, which is suitable for isotope analysis by MC-ICP-MS as well as TIMS, has been developed. The chemistry is designed...
Argon isotope ratio of the plume-source deduced from high-resolution stepwise crushing extraction
3He/4He 40Ar/36Ar noble gases Loihi mantle plume
2017/8/10
We have carried out noble gas analysis for gases released by a high-resolution stepwise crushing on basaltic glass and olivine separated from a new set of pillow basalts collected form the Loihi seamo...
Memory Effects in Compound-Specific D/H Analysis by Gas Chromatography/Pyrolysis/Isotope-Ratio Mass Spectrometry
Compound-Specifi c D/H Analysis Memory Effects
2014/4/8
Compound-specific analyses of lipid D/H ratios often
encounter ranges of 300‰ or more, and experiments
using D-enriched water to study fractionations often
extend the range up to 1000‰. Here ...
Isotope-ratio detection for gas chromatography
Combustion interface / Compound-specific isotope analysis GC-isotope-ratio mass spectrometry sotope-ratio-monitoring Pyrolysis interface /
2014/4/8
Instrumentation and methods exist for highly precise analyses of the stable-isotopic
composition of organic compounds separated by GC. The general approach combines a conventional GC, a chemical reac...
Correction of H3 + Contributions in Hydrogen Isotope Ratio Monitoring Mass Spectrometry
Hydrogen Isotope Ratio Monitoring Mass Correction
2014/4/8
Two fundamentally different approaches, termed “pointwise” and “peakwise,” are currently used to correct
hydrogen isotope ratio monitoring data for the presence
of H3
+
ion contributions. Consider...
Determination of the H3 Factor in Hydrogen Isotope Ratio Monitoring Mass Spectrometry
Hydrogen Isotope Ratio Monitoring Mass Spectrometry
2014/4/8
The H3 factor, K, is a parameter required in highprecision, mass spectrometric analyses of hydrogen isotopic abundances. When H2 is used as the sample gas,
R* ) R - Ki2, where R* is the true HD/H2 ra...