Manufacturing impurities in chlorinated solvent products are of significant forensic importance for bracketing when a release occurred and/or identifying the source. While forensic techniques traditionally used for age dating and source discrimination, such as compound specific isotope analysis (CSIA), isotopic and chemical ratio analysis, reconstructed plume techniques, surrogate chemical indicators and stabilizers are available, less emphasis has been given to the use of manufacturing impurities as a corroborative technique.
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