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Title: Development of a membrane for in-situ optical detection of TNT
Authors: University of New Hampshire. Dept. of Chemistry.
U.S. Army Toxic and Hazardous Materials Agency.
Zhang, Yuke
Seitz, W. Rudolf
Sundberg, Donald C.
Keywords: Contaminated groundwater
Fiber optics
Water pollution
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 88-24.
Description: Technical report
Abstract: A membrane has been developed for in-situ determination of polynitroaromatic hydrocarbons in groundwater at levels as low as 10 ng/mL. A typical membrane is prepared by dissolving the following in tetrahydrofuran: 0.5 g poly(vinyl chloride) (PVC), 0.2 mL dioctyl phthalate to serve as a plasticizer and 0.12 mL Jeffamine T403, a polyoxyethyleneamine that also acts as a plasticizer, as well as reacting with polynitroaromatic hydrocarbons to produce a colored product. The membrane is formed by casting the solution into a glass Petri dish with a diameter of 8 cm and allowing the solvent to slowly evaporate. Trace amounts of 2,4,6-trinitrotoluene (TNT), 1,3,5-trinitrobenzene (TNB), 2,4,5-trinitrotoluene (2,4,5-TNT), and methyl-2,4,6-trinitrophenyl nitramine (tetryl) react with the membrane to produce a visually observable reddish brown color. No pretreatment of water samples is required. Recoveries of 0.1 to 4.0 ppm TNT from spiked groundwater ranged from 95% to 105%. Direct analysis of water samples agreed with HPLC results.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Special Report

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