Isotopic reference materials are compounds (solids, liquids, gasses) with well-defined isotopic compositions and are the ultimate sources of accuracy...

Isotope analysis is the identification of isotopic signature, abundance of certain stable isotopes of chemical elements within organic and inorganic compounds...

Geotraces Isotope hydrology Isotopomer Nuclear isomer List of nuclides List of particles Mass spectrometry Reference materials for stable isotope analysis Table...

Isotope analysis has many applications in archaeology, from dating sites and artefacts, determination of past diets and migration patterns and for environmental...

An isotopic signature (also isotopic fingerprint) is a ratio of non-radiogenic 'stable isotopes', stable radiogenic isotopes, or unstable radioactive...

measure some standard materials (see Reference materials for stable isotope analysis). With internal standards and reference materials, analytical session...

specific labeled compounds. Metabolic flux analysis (MFA) using stable isotope labeling is an important tool for explaining the flux of certain elements...

isotopes in a given sample. This technique has two different applications in the earth and environmental sciences. The analysis of 'stable isotopes'...

isotope biogeochemistry is the study of the distribution of sulfur isotopes in biological and geological materials. In addition to its common isotope...

fractionation, whereas radiogenic isotope geochemistry is concerned with the products of natural radioactivity. For most stable isotopes, the magnitude of fractionation...

using the distribution and relative abundance of hydrogen isotopes. Hydrogen has two stable isotopes, protium 1H and deuterium 2H, which vary in relative abundance...

This method for natural abundance kinetic isotope measurement is favorable for analysis for reactions containing unstable starting materials, and catalysts...

Petersburg, Florida. Glossary of meteoritics δ 34S Reference materials for stable isotope analysis Meteoritical Bulletin Database: Canyon Diablo "Spaceguard...

term for chemtrail conspiracy theory, a set of conspiracy theories Standard Light Antarctic Precipitation, a reference material for stable isotope analysis...

Isotopic analysis by nuclear magnetic resonance refers to overarching set of methodologies to precisely quantify differences in isotopic content at each...

quantitative analysis techniques at a lower resolution than NanoSIMS of stable isotopically labeled molecules was limited to analyzed bulk material, which did...

(hydrogen-2, symbol 2H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen; the other is protium, or hydrogen-1, 1H. The deuterium...

atomic weight: 4.002602(2)) has nine known isotopes, but only helium-3 (3He) and helium-4 (4He) are stable. All radioisotopes are short-lived; the longest-lived...

rely significantly on isotope dilution when producing certified reference materials. In addition to high-precision analysis, isotope dilution is applied...

observationally stable isotopes: 204Pb, 206Pb, 207Pb, 208Pb. Lead-204 is entirely a primordial nuclide and is not a radiogenic nuclide. The three isotopes lead-206...

A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess numbers of either neutrons or protons, giving it...

are 34 known isotopes of krypton (36Kr) with atomic mass numbers from 67 to 103. Naturally occurring krypton is made of five stable isotopes and one (78...

Trace metal stable isotope biogeochemistry is the study of the distribution and relative abundances of trace metal isotopes in order to better understand...

occurring radioactive element (radioelement) with no stable isotopes. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives...

artificial elements, it has no stable isotopes. It was synthesized before being found in nature, with the first isotope synthesized being 238Pu in 1940...

Thorium (90Th) has seven naturally occurring isotopes but none are stable. One isotope, 232Th, is relatively stable, with a half-life of 1.40×1010 years, considerably...

Thomas (2014-03-20). "Assessment of international reference materials for isotope-ratio analysis (IUPAC Technical Report)". Pure and Applied Chemistry...

Oxygen-18 (18 O, Ω) is a natural, stable isotope of oxygen and one of the environmental isotopes. 18 O is an important precursor for the production of fluorodeoxyglucose...

supplement, and stable isotope analysis. The program was established in 1976 to produce CRMs for inorganic and organic marine environmental analysis and remains...

Protactinium (91Pa) has no stable isotopes. The four naturally occurring isotopes allow a standard atomic weight to be given. Thirty radioisotopes of protactinium...