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CSIA has been used for a limited number of contaminated-site investigations, and only rarely have more than one (and never more than two) isotope systems been combined to obtain a higher level of confidence in the results (e.g. Zwank et al., 2005). isoSoil will be consistent in the analysis of several isotope systems (up to three of four) in each target compound. This will vastly increase the accuracy of CSIA in site investigations.
Multidimensional CSIA
isoSoil builds on multidimensional CSIA where several isotopes are analyzed for each compound – such as  13C/12C and  2H/1H in PAHs, with the addition of  37Cl/35Cl for chlorinated solvents or 15N/14N in explosives. Coupling of the data for several isotopes makes it possible to elucidate both the fraction remaining contaminant and the reaction pathway(s).

Therefore IsoSoil proposes a development of the CSIA tool in soil contamination assessment. In addition to adding the CSIA dimension to soil contaminant assessment, IsoSoil will reward progress in:
  • Simultaneous use of multi-dimensional CSIA systems as a powerful assessment tool for improved degradation monitoring
  • Simultaneous use of another set of multi-dimensional CSIA systems as a powerful assessment tool for improved contaminant source apportionment
  • Development of improved analytical methods for improved throughput in CSIA of the Cl and Br isotope systems;
  • Development of a theoretical framework that will translate isotope fractionation factors from special to general cases, and allow for accurate prediction of factors to fill knowledge gaps where existing experimental data is insufficient
The research has received funding from the European Community's Seventh.
Framework Programme FP7/(2009-2012) under grant agreement no 212781.