BTEX , isotope

KeUey C. A., Hammer B. T., and Coffin R. B. (1997) Concentrations and stable isotope values of BTEX in gasoline-contaminated groundwater. Environ. Sci. Technol. 31(9), 2469-2472. 

Kelley et al. [125] measured the carbon isotope values of BTEX (benzene, toluene, ethylbenzene, and xylenes) at a petrol-contaminated site in southern California. The BTEX data were determined using a purge and trap connected to a GC-MS and also using GC-IRMS. The results indicated that there were two sources of contamination at the site, and also that the leaded and unleaded petrols at one of the sites had different carbon isotope values. 

Dempster et al. [126] and Harrington et al. [127] demonstrate using GC-IRMS and DI-IRMS, respectively, that commercially available BTEX can have a wide range of carbon isotope values and that these values are different for samples from different manufacturers. 

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