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Acta Chimica Slovaca

The Journal of Slovak University of Technology in Bratislava

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1337-978X
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MSPD as sample preparation method for determination of selected pesticide residues in apples

Andrea Purdešová
  • Corresponding author
  • Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, STU, Radlinského 9, 812 37 Bratislava, Slovakia
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Milena Dömötorová
  • Public Health Officer of the Slovak Republic, Trnavská cesta 52, P.O.BOX 45, 826 45 Bratislava 29, Slovak Republic
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-06-23 | DOI: https://doi.org/10.1515/acs-2017-0007

Abstract

A method for extraction and fast gas chromatographic (GC) determination of twenty pesticide residues of different volatility and polarity at ultratrace concentration level in apples is presented. Apples as representatives of non-fatty food were chosen as a matrix; they are also a common raw material for baby food production. Under fast GC conditions employing a mass spectrometric detector (MSD), several parameters of the MSPD procedure were optimised. Samples were homogenised with sorbent Florisil, pesticides were eluted with the optimised volume of etylacetate. After solvent evaporation to dryness, reconstitution of the rest to toluene follow and the final extract was injected. Recoveries obtained at three selected concentration levels were determined. The optimised procedure led to recoveries ≥ 90 % for the majority of the studied pesticides and the limits of quantification (LOQs) < 5 μg.kg-1. Repeatability of gas chromatography-mass spectrometry (GC-MS) measurements of the matrix matched standards, expressed as the relative standard deviation (RSD [%]), was in most cases acceptable for ultratrace concentration levels of pesticide residues.

Keywords: Fast GC; GC-MS; MSPD

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About the article

Published Online: 2017-06-23

Published in Print: 2017-04-25


Citation Information: Acta Chimica Slovaca, Volume 10, Issue 1, Pages 41–46, ISSN (Online) 1337-978X, DOI: https://doi.org/10.1515/acs-2017-0007.

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© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava . This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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