Fresenius' Journal of Analytical Chemistry

, Volume 369, Issue 2, pp 176–183

Determination of the pesticide naptalam and its degradation products by positive and negative ion mass spectrometry

Authors

  • A. Ghassempour
    • Department of Chemistry, Faculty of Science, Guilan University, P. O. Box 41335–1914, Rasht, Iran
  • Mohammad Reza Arshadi
    • Department of Chemistry, Sharif University of Technology, Tehran, P. O. Box 11365–9515, Iran
  • Feridoun Salek Asghari
    • Quality Control Laboratory, Zakaria Pharm. Co., Tabriz, 51575–5181, Iran
Original paper

DOI: 10.1007/s002160000589

Cite this article as:
Ghassempour, A., Arshadi, M. & Asghari, F. Fresenius J Anal Chem (2001) 369: 176. doi:10.1007/s002160000589

Abstract

N-1-Naphthylphtalamic acid (naptalam) and its degradation products, 1-naphthylamine and N-(1-naphthyl) phthalimide were simultaneously determined in river water by two independent mass spectrometric (MS) methods. These were negative ion MS (NIMS) and programmable temperature vaporizer gas chromatography mass spectrometry (PTV-GC MS) with electron impact ionization (positive ions). Prior to the NIMS analysis, the samples were preconcentrated by solid phase extraction (SPE) of C18 membrane discs. The PTV-GC MS studies were performed without any preconcentration procedure. Selected ion monitoring (SIM) and internal standardization with naphthalene were applied in both methods. The limits of determination (LOD) of NIMS studies were 230, 270 and 260 ng L–1 for naptalam, 1-naphthylamine and N-(1-naphthyl) phthalimide, respectively, with relative standard deviation (RSD) < 1% (n = 5) and of PTV-GC MS 17, 11 and 15 ng L–1 (RSD < 0.7%, n = 5). The LOD, linearity, RSD and time required for these methods are far better than for HPLC analyses.

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© Springer-Verlag Berlin Heidelberg 2001