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Distinctive calcium isotopic composition of mice organs and fluids: implications for biological research
The stable calcium (Ca) isotopes offer a minimally invasive method for assessing Ca balance in the body, providing a new avenue for research and...
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Stable neodymium isotopic composition of nuclear debris samples
Fission reactions result in Nd isotope decay products which alter Nd isotopic compositions measured in nuclear debris. Trinitite samples measured by...
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Approbation of a Procedure for Determining the Isotopic Composition of Individual Carbon Fractions in an Atmospheric Aerosol by Isotope Ratio Mass Spectrometry
AbstractThe ratio of stable carbon isotopes can give important data about the sources of atmospheric carbon compounds. We consider a procedure for...
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COM-1 and Hongcheon: New monazite reference materials for the microspot analysis of oxygen isotopic composition
BackgroundMonazite, a moderately common light rare earth element (LREE) and thorium phosphate mineral, has chemical, age, and isotopic...
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Coupling of nitric acid digestion and anion-exchange resin separation for the determination of methylmercury isotopic composition within organisms
Isotope ratios of methylmercury (MeHg) within organisms can be used to identify sources of MeHg that have accumulated in food webs, but these...
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Effect of the Isotopic Composition of Fe on the Kinetics of Its α → γ Phase Transition
Abstract—Using differential scanning calorimetry, we have examined the effect of isotopic composition on the temperature and kinetics of the α → γ...
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Isotopic measurements of carbon dioxide: the role of measurement science and standards
Isotopic measurements provide valuable information about the origin of greenhouse gases — as carbon dioxide levels increase, there is a corresponding...
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Effect of the Isotopic Composition of Fe on Its Linear Thermal Expansion Coefficient
Abstract —The linear thermal expansion coefficients (LTECs) of isotopically natural Fe ( nat Fe) and samples isotopically enriched in 56 Fe (99.945 wt...
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Electrophoretic Separation of Ions, Including Isotopic Ones, with Similar Chemical Properties for Preparative and Analytical Purposes
AbstractThe reasons for the failure of the first attempts at countercurrent electrophoretic separation of isotopic lithium ions are analyzed. It is...
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Variation in isotopic composition of precipitation with identification of vapor source using deuterium excess as tool
The stable isotopic contents of precipitation and deuterium excess (d-excess) data justified the hypothesis that two distinct vapor sources are...
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50 Years of uranium isotopic reference materials at JRC-Geel
The history of uranium isotopic reference materials from JRC-Geel during the last 50 years is reviewed by presenting certification methods and...
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Participation of Czech laboratories in isotopic, structural, and elemental characterization of uranium nuclear forensic samples within the 7th collaborative material exercise
This paper describes the nuclear-forensic characterization of materials provided by the Nuclear Forensic International Technical Working Group within...
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Isotopic variations of Sm, Gd, Er and Yb found in planetary materials caused by neutron-capture reactions in nature
The isotopic shifts of 149 Sm– 150 Sm and 157 Gd– 158 Gd have often been observed in meteorites and lunar surface materials, because they result from the...
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The distinct conditions of atmospheric and underground nuclear tests revealed by Zn isotopic compositions of nuclear debris samples
We analyzed the Zn isotopic compositions of nuclear debris samples from atmospheric and underground nuclear tests. Samples from the site of...
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Sample size and the limits to precision in Pb-isotopic dating by ID-TIMS
Using isotope analysis of ancient (4555 Ma) radiogenic Pb by ID-TIMS as an example, I evaluate the sample size required to achieve the target...
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Determination of age, isotopic ratios, and elemental impurities in nuclear materials by single quadrupole ICP-MS
In the context of the Collaborative Materials Exercise CMX-7 organized by the Nuclear Forensics International Technical Working Group (ITWG), four...
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Quantitative and isotopic analysis of single micrometer-sized uranium particles using multiple mass spectrometric techniques
This paper describes the isotopic and quantitative analysis of single micrometer-sized uranium particles by multiple mass spectrometric techniques...
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Comparing 13C methyl and deuterated methyl isotopic labeling for the quantification of methyl cellulose patterns using mass spectrometry
The methyl substitution along and among the polymer chains of methyl cellulose (MC) is commonly analyzed by ESI-MS after perdeuteromethylation of the...
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Study of phosphate sorption on rendzina soil by heterogeneous isotopic exchange: a biexponential kinetic model
AbstractPhosphate sorption on rendzina soil was studied by P-32 heterogeneous isotopic exchange under a steady-state. There are two types of sorbed...
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Change in Isotopic Composition of Oxygen in Air Separation Process
The paper describes the main components of atmospheric air. The main air separation methods are considered. The main methods for producing isotopes...
