Isotope Fractionation Processes

Rieley, G. (1994) Derivatization of organic compounds prior to gas chromatographic combustion isotope ratio mass spectrometric analysis identification of isotope fractionation processes. Analyst 119, 915 919. 

It is a common practice to describe mass dependent isotope fractionation processes by a single linear curve on a three-isotope-plot (Matsuhisa et al. 1978). The resulting straight lines are referred to as terrestrial mass fractionation lines and deviations from it are used as indicating nonmass-dependent isotope effects. The three-isotope-plot is based on the approximation of a power law function to linear format. To describe how far a sample plots off the mass-dependent fractionation line, a new term has been introduced A 0, A Mg, A S, etc. Several definitions of A have been introduced in the literature, which have been discussed by Assonov and Bren-ninkmeijer (2005). The simplest definition is given by ... 

Isotope Fractionation Processes of Selected Elements j I Evaporite sulOite... 

The isotope composition of magmatic volatiles and related isotope fractionation processes can be deduced by analyses of glasses, volcanic gases, and hot springs. The main process that can cause isotope fractionation of volatile compounds is degassing... 

Isotope fractionation processes resulting from differential water movement through the soil or the aquifer or due to kinetic or exchange reactions within geologic formations... 

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