A New Method for Determining Compound Specific Carbon Isotope of Chlorinated Solvents in Porewater. Issue 3 (9th March 2021)

• Record Type: Journal Article
• Authors: Herrero, Jofre; Puigserver, Diana; Parker, Beth L.; Carmona, José M.
• Is Part Of: Ground water monitoring & remediation. Volume 41:Issue 3(2021)
• Page Start: 51
• Page End: 57
• Publication Date: 2021-03-09
• Subjects: Groundwater -- Periodicals; Groundwater -- Purification -- Periodicals; Wellhead protection -- Periodicals; Hydrogeology -- Periodicals; 553.790286
• DOI: 10.1111/gwmr.12435
• Languages: English
• ISSNs: 1069-3629

Abstract

Abstract: A new method for the extraction of chlorinated solvents (CSs) from porewater with dimethylacetamide (DMA) used as a solvent and the determination of δ 13 C by gas chromatography‐isotope ratio mass spectrometry (GC‐IRMS) with solid‐phase microextraction (SPME) are presented. This method was used for the determination of δ 13 C 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 analyzer—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 of CSs in porewater, which can be beneficial in sites where the identification of contamination sources and the behavior of the contaminants are not clear. Abstract : Article impact statement : Enhanced method for CSIA of chlorinated solvents in porewater, based on solvent extraction and GC‐IRMS with SPME.