Guidance for using Compound Specific Isotope Analysis (CSIA) for the Assessment of Transformation of Nitroaromatic Explosives and RDX
Abstract:
Methods are needed to verify that attenuation of energetic compounds, such as trinitrotoluene (TNT) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), in groundwater is occurring, and it must also be possible to verify that strategies to enhance degradation processes are having the desired effects. This document provides a primer on sample collection, processing, and laboratory methods for compound specific isotope analysis (CSIA)methods for nitro explosives. Data evaluation, analysis, and interpretation for both single and dual isotope fractionation is presented. Two case studies are used to demonstrate the procedures for using CSIA to support the identification of the relevant reaction process and calculate the extent of which reaction, versus dilution or sorption, is leading to decreases in concentration.