Microflow liquid chromatography coupled to mass spectrometry--an approach to significantly increase sensitivity, decrease matrix effects, and reduce organic solvent usage in pesticide residue analysis.
Identifieur interne : 001945 ( Ncbi/Merge ); précédent : 001944; suivant : 001946Microflow liquid chromatography coupled to mass spectrometry--an approach to significantly increase sensitivity, decrease matrix effects, and reduce organic solvent usage in pesticide residue analysis.
Auteurs : Ana Uclés Moreno [Espagne] ; Sonia Herrera L Pez ; Barbara Reichert ; Ana Lozano Fernández ; María Dolores Hernando Guil ; Amadeo Rodríguez Fernández-AlbaSource :
- Analytical chemistry [ 1520-6882 ] ; 2015.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Pesticide Residues.
- chemistry : Capsicum, Citrus sinensis, Lycopersicon esculentum, Solvents.
- methods : Chromatography, Liquid, Solid Phase Extraction, Spectrometry, Mass, Electrospray Ionization.
- Sensitivity and Specificity.
Abstract
This manuscript reports a new pesticide residue analysis method employing a microflow-liquid chromatography system coupled to a triple quadrupole mass spectrometer (microflow-LC-ESI-QqQ-MS). This uses an electrospray ionization source with a narrow tip emitter to generate smaller droplets. A validation study was undertaken to establish performance characteristics for this new approach on 90 pesticide residues, including their degradation products, in three commodities (tomato, pepper, and orange). The significant benefits of the microflow-LC-MS/MS-based method were a high sensitivity gain and a notable reduction in matrix effects delivered by a dilution of the sample (up to 30-fold); this is as a result of competition reduction between the matrix compounds and analytes for charge during ionization. Overall robustness and a capability to withstand long analytical runs using the microflow-LC-MS system have been demonstrated (for 100 consecutive injections without any maintenance being required). Quality controls based on the results of internal standards added at the samples' extraction, dilution, and injection steps were also satisfactory. The LOQ values were mostly 5 μg kg(-1) for almost all pesticide residues. Other benefits were a substantial reduction in solvent usage and waste disposal as well as a decrease in the run-time. The method was successfully applied in the routine analysis of 50 fruit and vegetable samples labeled as organically produced.
DOI: 10.1021/ac5035852
PubMed: 25495653
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pubmed:25495653Le document en format XML
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<author><name sortKey="Hernando Guil, Maria Dolores" sort="Hernando Guil, Maria Dolores" uniqKey="Hernando Guil M" first="María Dolores" last="Hernando Guil">María Dolores Hernando Guil</name>
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<author><name sortKey="Fernandez Alba, Amadeo Rodriguez" sort="Fernandez Alba, Amadeo Rodriguez" uniqKey="Fernandez Alba A" first="Amadeo Rodríguez" last="Fernández-Alba">Amadeo Rodríguez Fernández-Alba</name>
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<term>Lycopersicon esculentum (chemistry)</term>
<term>Pesticide Residues (analysis)</term>
<term>Sensitivity and Specificity</term>
<term>Solid Phase Extraction (methods)</term>
<term>Solvents (chemistry)</term>
<term>Spectrometry, Mass, Electrospray Ionization (methods)</term>
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<term>Citrus sinensis</term>
<term>Lycopersicon esculentum</term>
<term>Solvents</term>
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<term>Spectrometry, Mass, Electrospray Ionization</term>
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<front><div type="abstract" xml:lang="en">This manuscript reports a new pesticide residue analysis method employing a microflow-liquid chromatography system coupled to a triple quadrupole mass spectrometer (microflow-LC-ESI-QqQ-MS). This uses an electrospray ionization source with a narrow tip emitter to generate smaller droplets. A validation study was undertaken to establish performance characteristics for this new approach on 90 pesticide residues, including their degradation products, in three commodities (tomato, pepper, and orange). The significant benefits of the microflow-LC-MS/MS-based method were a high sensitivity gain and a notable reduction in matrix effects delivered by a dilution of the sample (up to 30-fold); this is as a result of competition reduction between the matrix compounds and analytes for charge during ionization. Overall robustness and a capability to withstand long analytical runs using the microflow-LC-MS system have been demonstrated (for 100 consecutive injections without any maintenance being required). Quality controls based on the results of internal standards added at the samples' extraction, dilution, and injection steps were also satisfactory. The LOQ values were mostly 5 μg kg(-1) for almost all pesticide residues. Other benefits were a substantial reduction in solvent usage and waste disposal as well as a decrease in the run-time. The method was successfully applied in the routine analysis of 50 fruit and vegetable samples labeled as organically produced.</div>
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<Abstract><AbstractText>This manuscript reports a new pesticide residue analysis method employing a microflow-liquid chromatography system coupled to a triple quadrupole mass spectrometer (microflow-LC-ESI-QqQ-MS). This uses an electrospray ionization source with a narrow tip emitter to generate smaller droplets. A validation study was undertaken to establish performance characteristics for this new approach on 90 pesticide residues, including their degradation products, in three commodities (tomato, pepper, and orange). The significant benefits of the microflow-LC-MS/MS-based method were a high sensitivity gain and a notable reduction in matrix effects delivered by a dilution of the sample (up to 30-fold); this is as a result of competition reduction between the matrix compounds and analytes for charge during ionization. Overall robustness and a capability to withstand long analytical runs using the microflow-LC-MS system have been demonstrated (for 100 consecutive injections without any maintenance being required). Quality controls based on the results of internal standards added at the samples' extraction, dilution, and injection steps were also satisfactory. The LOQ values were mostly 5 μg kg(-1) for almost all pesticide residues. Other benefits were a substantial reduction in solvent usage and waste disposal as well as a decrease in the run-time. The method was successfully applied in the routine analysis of 50 fruit and vegetable samples labeled as organically produced.</AbstractText>
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<name sortKey="Hernando Guil, Maria Dolores" sort="Hernando Guil, Maria Dolores" uniqKey="Hernando Guil M" first="María Dolores" last="Hernando Guil">María Dolores Hernando Guil</name>
<name sortKey="Herrera L Pez, Sonia" sort="Herrera L Pez, Sonia" uniqKey="Herrera L Pez S" first="Sonia" last="Herrera L Pez">Sonia Herrera L Pez</name>
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