Determination of nitroaromatic and nitramine type energetic materials in synthetic and real mixtures by cyclic voltammetry

Ayşem Üzer, Şener Saǧlam, Yasemin Tekdemir, Belkis Ustamehmetoǧlu, Esma Sezer, Erol Erçaǧ, Reşat Apak*

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31 Atıf (Scopus)

Özet

Nitro-explosives contain reducible aromatic -NO2 groups or cyclic >N-NO2 bonds that may undergo reductive cleavage. This work reports the development of a cyclic voltammetric (CV) assay for nitro-aromatics (trinitrotoluene (TNT), dinitrotoluene (DNT)) and nitramines (1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) and octahydro-1,3,5,7-tetranitro- 1,3,5,7-tetrazocine (HMX)) using a glassy carbon electrode. This determination was first used for these energetic materials by resolving current responses of reduction potentials primarily due to one constituent but partly contributed by other constituents. Calibration curves of current intensity versus concentration were linear in the range of 30-120 mg L-1 for RDX with a limit of detection (LOD) of 10.2 mg L-1, 40-120 mg L-1 for HMX (LOD=11.7 mg L-1), 40-120 mg L-1 for TNT (LOD=11.2 mg L-1), and 40-140 mg L-1 for DNT (LOD=10.8 mg L -1). Results showed that the CV method could provide a sensitive approach for the simultaneous determination of RDX and TNT in synthetic and real mixtures. Deconvolution of current contributions of mixtures at peak potentials of constituents was performed by multiple linear regression. The proposed method was successfully applied to the analysis of military explosives comp A5 and octol, and method validation was performed both against HPLC on a comp B (TNT+RDX) sample and against GC-MS on real post-blast residual samples containing both explosives.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)768-778
Sayfa sayısı11
DergiTalanta
Hacim115
DOI'lar
Yayın durumuYayınlandı - 2013

Finansman

The authors wish to express their gratitude to the Ministry of National Defence, Office of Technical Services, to Machinery & Chemistry Industries Institution (MKEK) for the donation of nitro- and composite explosive samples, Additionally, the authors thank the Turkish Republic Ministry of Science, Industry and Technology−General Directorate of Science and Technology (T.C. Bilim, Sanayi ve Teknoloji Bakanlığı−Bilim ve Teknoloji Genel Müdürlüğü) for the San-Tez Project 00601.STZ.2010-1. The Ministry wishes to declare that none of the ideas (originally belonging to the authors) presented in this article represents their official view. All authors wish to repeat their thanks to MKEK for their general support by taking part in the indicated San-Tez Project. The authors extend these thanks to Istanbul University Research Fund for the support given to Normal Project-12110 and 14412. One of the authors (Dr. Erol Erçağ) extends his thanks to Istanbul University Research Fund for the support given to UDP Project-22511, which enabled him to present a part of this work in the 15th International Seminar on New Trends in Research of Energetic Materials in Pardubice, Czech Republic. Two authors (Ş. Sağlam and Y. Tekdemir) wish to thank the Turkish Academy of Sciences (TUBA) for research expenses support conveyed by Dr. Reşat Apak (Academy member).

FinansörlerFinansör numarası
Istanbul Üniversitesi14412

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