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Nitroguanidine and 2,4-Dinitroanisole (DNAN) are two insensitive energetic
ingredients which are recently used as munitions explosives. To protect our
environment and human health, the levels of these compounds in soils and waters need
to be monitored. However, there have been no analytical methods developed for this
purpose. In general, the concentrations of explosives in either soil or water samples are
very low. Th
erefore, a fast and sensitive method is required to monitor those compounds.
In this study, a fast, simple, and sensitive analytical method has been developed and
validated to quantitatively determine nitroguanidine and DNAN in soil, tap water,
and river water, by using high performance liquid chromatography - tandem mass
spectrometry (HPLC-MS/MS). To make this method to be a comprehensive analytical
technique for other explosives, it has included other commonly used explosives in the
method development, such as Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX),
1,3,5-Trinitroper- hydro-1,3,5-triazine (RDX), 2,4,6-trinitrotoluene (TNT), 2-amino-
4,6-dinitrotoluene (ADNT), and Pentaerythritol tetranitrate (PETN). Th
detection limits (MDLs) of these compounds in soil ranged from 0.2 to 5 ppb and a
good linearity was obtained over a concentration range of 0.5-200 ppb. Recoveries of
some compounds are the same or better than those obtained using EPA methods. .
is method was also successfully applied to diff
erent water matrices, and plant tissues.
e detailed experimental conditions, interferences, and results will be presented at
the conference. Th
is study was supported by Th
e Leonard Wood Institute (LWI) and
environmental Research Center at Missouri University of Science and Technology.
Yinfa Ma received his Ph.D. in analytical chemistry and minor Ph.D. in biochemistry in December 1990 from Iowa State University. Ma has serviced as chemistry faculty at both Truman State University (1990-2000) and Missouri University of Science and Technology (2000-present). He is currently a Curators? Teaching Professor in chemistry. He is currently associate editor for Global Journal of Analytical Chemistry. He served as a guest editor for Electrophoresis journal in 1998 and 2002. Ma has published 96 peer-reviewed journal papers and 17 book chapters, given 202 presentations at national and international conferences, delivered 55 invited seminars, and fi lled 10 patents.
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