In situ analysis of agrochemical residues on fruit using ambient ionization on a handheld mass spectrometer.
Identifieur interne : 000683 ( PubMed/Curation ); précédent : 000682; suivant : 000684In situ analysis of agrochemical residues on fruit using ambient ionization on a handheld mass spectrometer.
Auteurs : Santosh Soparawalla [États-Unis] ; Fatkhulla K. Tadjimukhamedov ; Joshua S. Wiley ; Zheng Ouyang ; R Graham CooksSource :
- The Analyst [ 1364-5528 ] ; 2011.
English descriptors
- KwdEn :
- Agrochemicals (analysis), Air Ionization, Citrus sinensis, Diphenylamine (analysis), Fruit (chemistry), Malus, Mass Spectrometry (instrumentation), Mass Spectrometry (methods), Pesticide Residues (analysis), Spectrometry, Mass, Electrospray Ionization (instrumentation), Spectrometry, Mass, Electrospray Ionization (methods), Tandem Mass Spectrometry (instrumentation), Thiabendazole (analysis).
- MESH :
- chemical , analysis : Agrochemicals, Diphenylamine, Pesticide Residues, Thiabendazole.
- chemistry : Fruit.
- instrumentation : Mass Spectrometry, Spectrometry, Mass, Electrospray Ionization, Tandem Mass Spectrometry.
- methods : Mass Spectrometry, Spectrometry, Mass, Electrospray Ionization.
- Air Ionization, Citrus sinensis, Malus.
Abstract
We describe a rapid in situ method for detecting agrochemicals on the surface or in the tissue of fruit using a portable mass spectrometer equipped with an ambient ionization source. Two such ionization methods, low temperature plasma (LTP) and paper spray (PS), were employed in experiments performed at a local grocery store. LTP was used to detect diphenylamine (DPA) directly from the skin of apples in the store and those treated after harvest with DPA were recognized by MS and MS/MS. These data therefore allowed ready distinction between organic and non-organic apples. DPA was also found within the internal tissue of purchased apples and its distribution was mapped using LTP. Similarly, thiabendazole residues were detected on the skin of treated oranges in a grocery store experiment in which paper spray was performed by wiping the orange surface with a moist commercial lens wipe and then applying a high voltage to ionize the chemicals directly from the wipe. The handheld mass spectrometer used in these measurements is capable of performing several stages of tandem mass spectrometry (up to MS(5)); the compounds on the fruit were identified by their MS/MS fragmentation patterns. Protonated DPA (m/z 170) produced a characteristic MS(2) fragment ion at m/z 92, while thiabendazole was identified by MS(3) using precursor to fragment ion transitions m/z 202 →m/z 175 →m/z 131. These particular examples exemplify the power of in situ analysis of complex samples using ambient ionization and handheld mass spectrometers.
DOI: 10.1039/c1an15493a
PubMed: 21892448
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pubmed:21892448Le document en format XML
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<author><name sortKey="Soparawalla, Santosh" sort="Soparawalla, Santosh" uniqKey="Soparawalla S" first="Santosh" last="Soparawalla">Santosh Soparawalla</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907</wicri:regionArea>
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<author><name sortKey="Tadjimukhamedov, Fatkhulla K" sort="Tadjimukhamedov, Fatkhulla K" uniqKey="Tadjimukhamedov F" first="Fatkhulla K" last="Tadjimukhamedov">Fatkhulla K. Tadjimukhamedov</name>
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<author><name sortKey="Wiley, Joshua S" sort="Wiley, Joshua S" uniqKey="Wiley J" first="Joshua S" last="Wiley">Joshua S. Wiley</name>
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<author><name sortKey="Ouyang, Zheng" sort="Ouyang, Zheng" uniqKey="Ouyang Z" first="Zheng" last="Ouyang">Zheng Ouyang</name>
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<author><name sortKey="Cooks, R Graham" sort="Cooks, R Graham" uniqKey="Cooks R" first="R Graham" last="Cooks">R Graham Cooks</name>
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<author><name sortKey="Wiley, Joshua S" sort="Wiley, Joshua S" uniqKey="Wiley J" first="Joshua S" last="Wiley">Joshua S. Wiley</name>
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<term>Citrus sinensis</term>
<term>Diphenylamine (analysis)</term>
<term>Fruit (chemistry)</term>
<term>Malus</term>
<term>Mass Spectrometry (instrumentation)</term>
<term>Mass Spectrometry (methods)</term>
<term>Pesticide Residues (analysis)</term>
<term>Spectrometry, Mass, Electrospray Ionization (instrumentation)</term>
<term>Spectrometry, Mass, Electrospray Ionization (methods)</term>
<term>Tandem Mass Spectrometry (instrumentation)</term>
<term>Thiabendazole (analysis)</term>
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<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Agrochemicals</term>
<term>Diphenylamine</term>
<term>Pesticide Residues</term>
<term>Thiabendazole</term>
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<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Fruit</term>
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<keywords scheme="MESH" qualifier="instrumentation" xml:lang="en"><term>Mass Spectrometry</term>
<term>Spectrometry, Mass, Electrospray Ionization</term>
<term>Tandem Mass Spectrometry</term>
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<keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Mass Spectrometry</term>
<term>Spectrometry, Mass, Electrospray Ionization</term>
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<front><div type="abstract" xml:lang="en">We describe a rapid in situ method for detecting agrochemicals on the surface or in the tissue of fruit using a portable mass spectrometer equipped with an ambient ionization source. Two such ionization methods, low temperature plasma (LTP) and paper spray (PS), were employed in experiments performed at a local grocery store. LTP was used to detect diphenylamine (DPA) directly from the skin of apples in the store and those treated after harvest with DPA were recognized by MS and MS/MS. These data therefore allowed ready distinction between organic and non-organic apples. DPA was also found within the internal tissue of purchased apples and its distribution was mapped using LTP. Similarly, thiabendazole residues were detected on the skin of treated oranges in a grocery store experiment in which paper spray was performed by wiping the orange surface with a moist commercial lens wipe and then applying a high voltage to ionize the chemicals directly from the wipe. The handheld mass spectrometer used in these measurements is capable of performing several stages of tandem mass spectrometry (up to MS(5)); the compounds on the fruit were identified by their MS/MS fragmentation patterns. Protonated DPA (m/z 170) produced a characteristic MS(2) fragment ion at m/z 92, while thiabendazole was identified by MS(3) using precursor to fragment ion transitions m/z 202 →m/z 175 →m/z 131. These particular examples exemplify the power of in situ analysis of complex samples using ambient ionization and handheld mass spectrometers.</div>
</front>
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<Abstract><AbstractText>We describe a rapid in situ method for detecting agrochemicals on the surface or in the tissue of fruit using a portable mass spectrometer equipped with an ambient ionization source. Two such ionization methods, low temperature plasma (LTP) and paper spray (PS), were employed in experiments performed at a local grocery store. LTP was used to detect diphenylamine (DPA) directly from the skin of apples in the store and those treated after harvest with DPA were recognized by MS and MS/MS. These data therefore allowed ready distinction between organic and non-organic apples. DPA was also found within the internal tissue of purchased apples and its distribution was mapped using LTP. Similarly, thiabendazole residues were detected on the skin of treated oranges in a grocery store experiment in which paper spray was performed by wiping the orange surface with a moist commercial lens wipe and then applying a high voltage to ionize the chemicals directly from the wipe. The handheld mass spectrometer used in these measurements is capable of performing several stages of tandem mass spectrometry (up to MS(5)); the compounds on the fruit were identified by their MS/MS fragmentation patterns. Protonated DPA (m/z 170) produced a characteristic MS(2) fragment ion at m/z 92, while thiabendazole was identified by MS(3) using precursor to fragment ion transitions m/z 202 →m/z 175 →m/z 131. These particular examples exemplify the power of in situ analysis of complex samples using ambient ionization and handheld mass spectrometers.</AbstractText>
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