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Title: A new Method for determining Compound Specific Carbon Isotope of Chlorinated Solvents in Porewater
Author: Herrero Ferran, Jofre
Puigserver Cuerda, Diana
Parker, B. L.
Carmona Pérez, José Ma. (José María)
Keywords: Isòtops de carboni
Hidrologia d'aigües subterrànies
Carbon isotopes
Groundwater hydrology
Issue Date: 21-Jan-2021
Publisher: Wiley
Abstract: A new method for the extraction of chlorinated solvents (CSs) from porewater with dimethylacetamide (DMA) used as a solvent and the determination of δ13C by gas chromatography-isotope ratio mass spectrometry (GC-IRMS) with solid-phase microextraction (SPME) are presented. This method was used for the determination of δ13C of chloroethenes and chloromethanes. The extraction of the CSs from porewater with DMA led to a minimal loss of mass of solvent and chlorinated compounds. The accuracy of the method was verified with the analysis of the pure injected compounds using elemental analyser - isotope ratio mass spectrometry (EA-IRMS). It has been effectively applied in a study area in saturated soil samples of a pollutant source zone of perchloroethylene (PCE) and trichloroethylene (TCE). The limit of quantification of the new method was 0.034 µg/g for PCE and TCE for 10-20 g of soil sample. This new method allows for compound-specific isotope analysis (CSIA) of CSs in porewater, which can be beneficial in sites where the identification of contamination sources and the behaviour of the contaminants are not clear.
Note: Versió postprint del document publicat a:
It is part of: Groundwater Monitoring & Remediation, 2021
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ISSN: 1069-3629
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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