HPLC Determination of Hexanitrohexaazaisowurtzitane (CL-20) in Soil and Aqueous Matrices
Final rept. Dec 2002-Jan 2004
EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Hexanitrohexaazaisowurtzitane CL-20 is a novel energetic material being investigated as a potential replacement for currently used explosive and propellant formulations. The principal objective of this study was to focus on the quantitative chemical analysis of freshly amended 0.01-100 mgkg and weatheredaged 0.01-10000 mgkg CL-20 in Sassafras Sandy Loam SSL soil extracts. Using modified U.S. Environmental Protection Agency USEPA Method 8330A, the instrumental limit of detection was 0.01 mgL. In acetonitrile extracts, the limits of detection for fresh and weatheredaged CL-20 in soils were 0.08 mgkg and 0.10 mgkg, respectively, while in ATCLP water extracts, the limits of detection for fresh and weatheredaged CL-20 in soils were 0.1 mgkg and 0.25 mgkg, respectively. At all amended concentrations, paired t-tests were used to show that the recovery percentages for freshly amended and weatheredaged CL-20 in soil were statistically different. The water extract recoveries were lower due to CL-20s reduced solubility in water. Higher concentrations of CL-20 in soil or1000 mgkg did not show a decrease in recovery. The CL-20 1.5-100 mgL was also directly amended to aquatic test media, and the percentage of recoveries were determined. An interlaboratory study was used to validate the modified method and verify experimental results.
- Inorganic Chemistry
- Soil Mechanics