H2 clumped isotope measurements at natural isotopic abundances
نویسندگان
چکیده
منابع مشابه
Statistical clumped isotope signatures
High precision measurements of molecules containing more than one heavy isotope may provide novel constraints on element cycles in nature. These so-called clumped isotope signatures are reported relative to the random (stochastic) distribution of heavy isotopes over all available isotopocules of a molecule, which is the conventional reference. When multiple indistinguishable atoms of the same e...
متن کاملClumped Isotopic Equilibrium and the Rate of Isotope Exchange between Co2 and Water
The reaction of CO2 hydration/dehydration controls the oxygen isotopic composition in both carbonate minerals and atmospheric CO2 through the exchange of oxygen isotopes with water. The use of O as an environmental indicator typically assumes isotopic equilibrium, namely full oxygen isotope exchange between CO2 and water. Clumped isotopes is a new isotopic tracer that is used in both CaCO3 and ...
متن کاملBodily variability of zinc natural isotope abundances in sheep.
Evidence is growing that the range of zinc stable isotope compositions, represented by the deviation of (66)Zn in permil units relative to a standard and expressed as delta(66)Zn, is larger in organic matter than in inorganic material. This study reports the variations of delta(66)Zn in various organs of sheep raised on a controlled diet. Zinc was purified by anion-exchange chromatography. The ...
متن کاملClumped isotope measurements of small carbonate samples using a high-efficiency dual-reservoir technique.
RATIONALE The measurement of multiply substituted isotopologues of CO2 derived from carbonate has allowed the reconstruction of paleotemperatures from a single phase (CaCO3 ), circumventing uncertainty inherent in other isotopic paleothermometers. Traditional analytical techniques require relatively large amounts of carbonate (3-8 mg per replicate), which limits the applicability of the clumped...
متن کاملCombined 13 C – D and D – D clumping in methane : Methods and preliminary results
The stable isotopic composition of methane (e.g., dD and dC values) is often used as a tracer for its sources and sinks. Conventional dD and dC measurements represent the average isotope ratios of all ten isotopologues of methane, though they are effectively controlled by the relative abundances of the three most abundant species: CH4, CH4, and CH3D. The precise relative abundances of the other...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Rapid Communications in Mass Spectrometry
سال: 2019
ISSN: 0951-4198
DOI: 10.1002/rcm.8323