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https://hdl.handle.net/11681/12084| Title: | Salting-out solvent extraction method for determining low levels of nitroaromatics and nitramines in water |
| Authors: | U.S. Army Toxic and Hazardous Materials Agency. Miyares, Paul H. Jenkins, Thomas F. |
| Keywords: | Explosives analysis Nitramines Nitroaromatics Salting-out extraction Water analysis |
| 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.)) ; 90-30. |
| Description: | Special Report Abstract: A protocol was developed for determining low levels of nitroaromatics and nitramines in ground water. Sample preparation employs salting-out extraction with acetonitrile and NaCl, further preconcentration of extract by solvent evaporation on a Kuderna-Danish concentrator, dilution of the concentrate with water, and filtration through a 0.5-~m Millex-SR filter. Separation is achieved using reversed-phase high-performance liquid chromatography with an LC-8 (3.3 cm) column using a 70.7/27.8/1.5 (v/v/v) water-methanol-THF eluent, and determination is obtained on a UV detector at 254 nm. This procedure provides far lower detection limits than the earlier protocol, which involved direct injection onto an LC-18 (25 cm) column eluted with 50/50 (v/v) methanol-water. The new method is capable of simultaneously determining RDX, TNB, DNB, TNT, 2,4-DNT, 2,6-DNT, 2-Am-DNT and 4-Am-DNT in less than five minutes, with reporting limits ranging from 0.02 to 0.84 ~g/L. Analytical recovery averaged greater than 95%. Note: Certain scientific symbols cannot be rendered by this system's character set. An ~ has been placed to indicate the presence of a missing symbol. These symbols will be present in the downloaded file. |
| Rights: | Approved for Public Release, Distribution is Unlimited |
| URI: | http://hdl.handle.net/11681/12084 |
| Appears in Collections: | Special Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| SR-90-30.pdf | 2.08 MB | Adobe PDF |  View/Open |