D TECH RDX Test Kit-(RDX in Water and Soil)-Certification No: 96-01-020
Final Decision to Certify Hazardous Waste Environmental Technology
The D TECH RDX assay system uses enzyme-linked immunosorbent assay (ELISA) technology. It differs from other systems in that polyclonal antibodies are supplied attached to latex particles. RDX in water is assayed directly; for soils, the system uses extraction with acetone. The immunoassay system is semi-quantitative. Provided that the materials are used properly, detection is possible at 5 to 45 ppb in water and 0.5 to 6.0 ppm in soil; extraction ranges can be extended upward by dilution of the extracts.
Quantitative readings about a selected target level are obtained by comparison with a color chart or in a microprocessor-equipped, hand-held, batter-operated reflectometer. The reaction with other nitroaromatics is insignificant except for HMX (octahydro-1,3,5-trinitro-1,3,5,7-tetranitro-1,3,5-triazine). TNT, dinitrotoluenes,2,4-dinitrophenol, and mononitroaromatics do not interfere. Differences in the extraction efficiency of RDX from various soils may cause positive or negative errors in the immunoassay results. Users should evaluate these factors before attempting to quantify results.
Great care is required and established safety measures must be observed in sampling and handling soil containing explosives. As with similar assays, certain temperature controls are required for reagent storage and for carrying out the assay. The assay should be used only by trained individuals to reduce operator-caused variability.
Strategic Diagnostics, Inc.
128 Sandy Drive
Newark, DE 19713
July 15, 1996
July 15, 1999
480 S. Democrat Road
Gibbstown, NJ 08027-1297
Tom G. Shoon at (415) 292-5870
Dwight Navis at (714) 717-7744
Dr. Wolfgang Fuhs
File last updated: October 23, 1996