Application of zirconium dioxide nanoparticle sorbent for the clean-up step in post-harvest pesticide residue analysis.
Identifieur interne : 001D43 ( Ncbi/Checkpoint ); précédent : 001D42; suivant : 001D44Application of zirconium dioxide nanoparticle sorbent for the clean-up step in post-harvest pesticide residue analysis.
Auteurs : Ana Uclés [Espagne] ; Sonia Herrera L Pez [Espagne] ; Maria Dolores Hernando [Espagne] ; Roberto Rosal [Espagne] ; Carmen Ferrer [Espagne] ; Amadeo R. Fernández-Alba [Espagne]Source :
- Talanta [ 1873-3573 ] ; 2015.
English descriptors
- KwdEn :
- Adsorption, Chromatography, Liquid, Citrus sinensis (chemistry), Limit of Detection, Linear Models, Nanoparticles (chemistry), Nanotubes, Carbon (chemistry), Pesticide Residues (analysis), Pesticide Residues (chemistry), Pesticide Residues (isolation & purification), Pyrus (chemistry), Safety, Solid Phase Extraction (economics), Solid Phase Extraction (methods), Soot (chemistry), Tandem Mass Spectrometry, Time Factors, Yttrium (chemistry), Zirconium (chemistry).
- MESH :
- chemical , analysis : Pesticide Residues.
- chemical , chemistry : Nanotubes, Carbon, Pesticide Residues, Soot, Yttrium, Zirconium.
- chemistry : Citrus sinensis, Nanoparticles, Pyrus.
- economics : Solid Phase Extraction.
- chemical , isolation & purification : Pesticide Residues.
- methods : Solid Phase Extraction.
- Adsorption, Chromatography, Liquid, Limit of Detection, Linear Models, Safety, Tandem Mass Spectrometry, Time Factors.
Abstract
The use of yttria-stabilized zirconium dioxide nanoparticles as d-SPE clean-up sorbent for a rapid and sensitive liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method for the determination of post-harvest fungicides (carbaryl, carbendazim, chlorpropham, diphenylamine, ethoxyquin, flutriafol, imazalil, iprodione, methomyl, myclobutanil, pirimiphos-methyl, prochloraz, pyrimethanil, thiabendazole, thiophanate-methyl and tolclofos-methyl) in orange and pear samples has been evaluated and validated. The sample preparation was a modification of the QuEChERS extraction method using yttria-stabilized zirconium dioxide and multi-walled carbon nanotubes (MWCNTs) nanoparticles as the solid phase extraction (d-SPE) clean-up sorbents prior to injecting the ten-fold diluted extracts into the LC system. By using the yttria-stabilized zirconium dioxide extraction method, more recoveries in the 70-120% range were obtained - thus this method was used for the validation. Quantification was carried out using a matrix-matched calibration curve which was linear in the 1-500 µg kg(-1) range for almost all the pesticides studied. The validated limit of quantification was 10 µg kg(-1) for most of the studied compounds, except chlorpropham, ethoxyquin and thiophanate-methyl. Pesticide recoveries at the 10 and 100 µg kg(-1) concentration levels were satisfactory, with values between 77% and 120% and relative standard deviations (RSD) lower than 10% (n=5). The developed method was applied for the determination of selected fungicides in 20 real orange and pear samples. Four different pesticide residues were detected in 10 of these commodities; 20% of the samples contained pesticide residues at a quantifiable level (equal to or above the LOQs) for at least one pesticide residue. The most frequently-detected pesticide residues were: carbendazim, thiabendazole and imazalil-all were below the MRL. The highest concentration found was imazalil at 1175 µg kg(-1) in a pear sample.
DOI: 10.1016/j.talanta.2015.05.055
PubMed: 26452791
Affiliations:
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pubmed:26452791Le document en format XML
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<term>Linear Models</term>
<term>Nanoparticles (chemistry)</term>
<term>Nanotubes, Carbon (chemistry)</term>
<term>Pesticide Residues (analysis)</term>
<term>Pesticide Residues (chemistry)</term>
<term>Pesticide Residues (isolation & purification)</term>
<term>Pyrus (chemistry)</term>
<term>Safety</term>
<term>Solid Phase Extraction (economics)</term>
<term>Solid Phase Extraction (methods)</term>
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<term>Pesticide Residues</term>
<term>Soot</term>
<term>Yttrium</term>
<term>Zirconium</term>
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<front><div type="abstract" xml:lang="en">The use of yttria-stabilized zirconium dioxide nanoparticles as d-SPE clean-up sorbent for a rapid and sensitive liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method for the determination of post-harvest fungicides (carbaryl, carbendazim, chlorpropham, diphenylamine, ethoxyquin, flutriafol, imazalil, iprodione, methomyl, myclobutanil, pirimiphos-methyl, prochloraz, pyrimethanil, thiabendazole, thiophanate-methyl and tolclofos-methyl) in orange and pear samples has been evaluated and validated. The sample preparation was a modification of the QuEChERS extraction method using yttria-stabilized zirconium dioxide and multi-walled carbon nanotubes (MWCNTs) nanoparticles as the solid phase extraction (d-SPE) clean-up sorbents prior to injecting the ten-fold diluted extracts into the LC system. By using the yttria-stabilized zirconium dioxide extraction method, more recoveries in the 70-120% range were obtained - thus this method was used for the validation. Quantification was carried out using a matrix-matched calibration curve which was linear in the 1-500 µg kg(-1) range for almost all the pesticides studied. The validated limit of quantification was 10 µg kg(-1) for most of the studied compounds, except chlorpropham, ethoxyquin and thiophanate-methyl. Pesticide recoveries at the 10 and 100 µg kg(-1) concentration levels were satisfactory, with values between 77% and 120% and relative standard deviations (RSD) lower than 10% (n=5). The developed method was applied for the determination of selected fungicides in 20 real orange and pear samples. Four different pesticide residues were detected in 10 of these commodities; 20% of the samples contained pesticide residues at a quantifiable level (equal to or above the LOQs) for at least one pesticide residue. The most frequently-detected pesticide residues were: carbendazim, thiabendazole and imazalil-all were below the MRL. The highest concentration found was imazalil at 1175 µg kg(-1) in a pear sample.</div>
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<name sortKey="Fernandez Alba, Amadeo R" sort="Fernandez Alba, Amadeo R" uniqKey="Fernandez Alba A" first="Amadeo R" last="Fernández-Alba">Amadeo R. Fernández-Alba</name>
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