منابع مشابه
Influence of Secondary Decay on Isotope-ratio Temperature Measurement
In intermediate energy heavy ion collisions, nuclear fragments are emitted from highly excited systems. Production of these particles appears to be dominated by their phase space, and can be described by statistical physics. Thus, temperature, a basic quantity in statistical physics, can be addressed experimentally. Two methods have been most commonly used to measure nuclear temperatures, both ...
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The question as to what constitutes a fully calibrated isotope amount ratio measurement still remains a topic of active research. For years, the definitive calibration approach has been by means of synthetic mixtures of highly enriched isotopes with known chemical purity to give gravimetrically defined ratios. This article outlines the core concepts and assumptions of this method and illustrate...
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To minimize confusion in the expression of measurement results of stable isotope and gas-ratio measurements, recommendations based on publications of the Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry (IUPAC) are presented. Whenever feasible, entries are consistent with the Système International d'Unités, the SI (known in English as...
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Isotope Ratio Mass Spectrometry (IRMS) is a specialized technique used to provide information about the geographic, chemical, and biological origins of substances. The ability to determine the source of an organic substance stems from the relative isotopic abundances of the elements which comprise the material. Because the isotope ratios of elements such as carbon, hydrogen, oxygen, sulfur, and...
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The performance of a gas chromatography-combustion-isotope ratio mass spectrometry system (GC-C-IRMS) with respect to the dependence of delta(13)C values on the amount of sample is presented. Particular attention is paid to the localization of the amount-dependent isotopic fractionation within the system. Injection experiments with varying amounts of gases (CO(2), n-hexane, and toluene) reveale...
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ژورنال
عنوان ژورنال: Analytical and Bioanalytical Chemistry
سال: 2016
ISSN: 1618-2642,1618-2650
DOI: 10.1007/s00216-016-9744-0