Potential of atmospheric pressure chemical ionization source in GC-QTOF MS for pesticide residue analysis

Journal of Mass Spectrometry : JMS
T PortolésP Hancock

Abstract

The potential applications of a new atmospheric pressure source for GC-MS analysis have been investigated in this work. A list of around 100 GC-amenable pesticides, which includes organochlorine, organophosphorus and organonitrogenated compounds, has been used to evaluate their behavior in the new source. Favoring the major formation of the molecular ion in the source has been the main goal due to the wide-scope screening possibilities that this fact brings in comparison with the traditional, highly fragmented electron ionization spectra. Thus, the addition of water as modifier has been tested as a way to promote the generation of protonated molecules. Pesticides investigated have been classified into six groups according to their ionization/fragmentation behavior. Four of them are characterized by the abundant formation of the protonated molecule in the atmospheric pressure source, mostly being the base peak of the spectrum. These results show that wide-scope screening could be easily performed with this source by investigating the presence of the protonated molecule ion, MH+. The developed procedure has been applied to pesticide screening in different food samples (nectarine, orange and spinach) and it has allowed the presenc...Continue Reading

References

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Citations

Mar 1, 2012·Analytical and Bioanalytical Chemistry·F HernándezL Mattioli
Mar 25, 2014·Journal of the American Society for Mass Spectrometry·María Luz Gómez-PérezAntonia Garrido Frenich
Jun 26, 2013·Bioanalysis·Tiziana PacchiarottaOleg A Mayboroda
Sep 11, 2014·Journal of Hazardous Materials·Félix HernándezFrancisco J López
Oct 11, 2016·Rapid Communications in Mass Spectrometry : RCM·Xiu-Ping ChenYin-Long Guo
Dec 15, 2016·Environmental Science and Pollution Research International·Petra C Lindholm-LehtoJuha S Knuutinen
Sep 13, 2019·Journal of the American Society for Mass Spectrometry·Joshua B Powers, Shawn R Campagna
Aug 21, 2019·Rapid Communications in Mass Spectrometry : RCM·Véronique PerraudBarbara J Finlayson-Pitts
Nov 8, 2017·Journal of Separation Science·Ivan Špánik, Andrea Machyňáková
Jul 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Christian LipokOliver J Schmitz
Nov 25, 2020·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Shizuka Saito-ShidaHiroshi Akiyama
Sep 1, 2018·Journal of Agricultural and Food Chemistry·Jon W WongJames S Chang
Apr 19, 2011·Analytical Chemistry·Ana Ballesteros-Gómez, Soledad Rubio

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