QuEChERS Method Followed by Solid Phase Extraction Method for Gas Chromatographic-Mass Spectrometric Determination of Polycyclic Aromatic Hydrocarbons in FishReportar como inadecuado




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International Journal of Analytical Chemistry - Volume 2015 2015, Article ID 352610, 7 pages -

Research Article

Central Laboratory of Residue Analysis of Pesticides and Heavy Metals in Food QCAP, Agricultural Research Center, Ministry of Agriculture and Land Reclamation, 7 Nadi Elsaid Street, Dokki, Giza 12311, Egypt

Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 11566, Egypt

Received 30 September 2014; Revised 4 December 2014; Accepted 6 December 2014

Academic Editor: Mohammad R. Pourjavid

Copyright © 2015 Mona Khorshid et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A gas chromatography equipped with mass spectrometer GCMS method was developed and validated for determination of 16 polycyclic aromatic hydrocarbons PAHs in fish using modified quick, easy, cheap, effective, rugged, and safe QuEChERS method for extraction and solid phase extraction for sample cleanup to remove most of the coextract combined with GCMS for determination of low concentration of selected group of PAHs in homogenized fish samples. PAHs were separated on a GCMS with HP-5ms Ultra Inert GC Column 30 m, 0.25 mm, and 0.25 µm. Mean recovery ranged from 56 to 115%. The extraction efficiency was consistent over the entire range where indeno1,2,3-cdpyrene and benzog,h,iperylene showed recovery 65, 69%, respectively, at 2 µg-kg. No significant dispersion of results was observed for the other remaining PAHs and recovery did not differ substantially, and at the lowest and the highest concentrations mean recovery and RSD% showed that most of PAHs were between 70% and 120% with RSD less than 10%. The measurement uncertainty is expressed as expanded uncertainty and in terms of relative standard deviation at 95% confidence level is 12%. This method is suitable for laboratories engaged daily in routine analysis of a large number of samples.





Autor: Mona Khorshid, Eglal R. Souaya, Ahmed H. Hamzawy, and Moustapha N. Mohammed

Fuente: https://www.hindawi.com/



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