Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/9246 |
Resumo: | Pesticides are compounds used on fruits and vegetables to avoid damage by pests. Usually, pesticide residue determination in fruits and vegetables has been performed by using gas chromatography coupled to mass spectrometry (GC-MS) and liquid chromatography coupled to mass spectrometry (LC-MS). Both techniques demonstrate excellent analytical performance but require laborious steps of sample preparation prior to instrumental analysis. Ambient mass spectrometry (AMS) is a group of techniques that requires minimal or no sample preparation and emerges as an alternative for analysis of pesticides in food. This work shows three chapters using AMS techniques for analysis of pesticides in fruits or vegetables. In the first approach, paper spray ionization (PSI) and leaf spray (LS) were compared by analyzing the pesticides atrazine, diuron and methomyl in lettuce, kale, basil, cabbage and arugula. Both techniques showed similar analytical performances. The calibration curves were obtained with R2>0.99 and the limits of detection (LOD) and quantification (LOQ) were found in ppb range. In the second approach, a molecularly imprinted polymer (MIP) was coupled to PSI-MS to obtain a selective method. MIP membrane spray ionization was employed for the analysis of diuron and 2,4-dichlorophenoxyacetic acid (2,4-D) in apple, banana and grape extracts. This method demonstrated higher signal intensities for diuron and 2,4-D in comparison to the non-imprinted polymer (NIP). The calibration curves were obtained with R2>0.99 for the pesticides in all fruit extracts, and the LODs were found below 0.60 ppb and LOQs below 2 ppb. The accuracy and precision values were lower than 20% and the values of recovery ranged from 92.5% to 116.9%. In the next chapter, matrix-assisted laser desorption ionization (MALDI) imaging was combined with infrared laser ablation sample transfer (IR-LAST) ambient technique to verify the penetration of the fungicide imazalil in apples. MALDI imaging was used to obtain information on the spatial location of the compound, whereas IR- LAST with electrospray ionization (ESI) was used for quantification. The fungicide was detected in the inner part of the apple one day after its application. The concentration of imazalil in the apple skin was reduced over the days. Seven days after application of the fungicide, a concentration of 0.015 ppm was found six millimeters inside the apple. The penetration rate of imazalil was approximately 1 mm per day. |
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Vaz, Boniek Gontijohttp://lattes.cnpq.br/7814534710550639Vaz, Boniek GontijoAugusti, RodineiLião, Luciano MoraisKato, LuciliaNascimento, Abadia dos Reishttp://lattes.cnpq.br/7725440188541413Silva, Igor Pereira da2019-01-23T10:12:37Z2018-12-04SILVA, Igor Pereira da. Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos. 2018. 113 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2018.http://repositorio.bc.ufg.br/tede/handle/tede/9246ark:/38995/001300000bm03Pesticides are compounds used on fruits and vegetables to avoid damage by pests. Usually, pesticide residue determination in fruits and vegetables has been performed by using gas chromatography coupled to mass spectrometry (GC-MS) and liquid chromatography coupled to mass spectrometry (LC-MS). Both techniques demonstrate excellent analytical performance but require laborious steps of sample preparation prior to instrumental analysis. Ambient mass spectrometry (AMS) is a group of techniques that requires minimal or no sample preparation and emerges as an alternative for analysis of pesticides in food. This work shows three chapters using AMS techniques for analysis of pesticides in fruits or vegetables. In the first approach, paper spray ionization (PSI) and leaf spray (LS) were compared by analyzing the pesticides atrazine, diuron and methomyl in lettuce, kale, basil, cabbage and arugula. Both techniques showed similar analytical performances. The calibration curves were obtained with R2>0.99 and the limits of detection (LOD) and quantification (LOQ) were found in ppb range. In the second approach, a molecularly imprinted polymer (MIP) was coupled to PSI-MS to obtain a selective method. MIP membrane spray ionization was employed for the analysis of diuron and 2,4-dichlorophenoxyacetic acid (2,4-D) in apple, banana and grape extracts. This method demonstrated higher signal intensities for diuron and 2,4-D in comparison to the non-imprinted polymer (NIP). The calibration curves were obtained with R2>0.99 for the pesticides in all fruit extracts, and the LODs were found below 0.60 ppb and LOQs below 2 ppb. The accuracy and precision values were lower than 20% and the values of recovery ranged from 92.5% to 116.9%. In the next chapter, matrix-assisted laser desorption ionization (MALDI) imaging was combined with infrared laser ablation sample transfer (IR-LAST) ambient technique to verify the penetration of the fungicide imazalil in apples. MALDI imaging was used to obtain information on the spatial location of the compound, whereas IR- LAST with electrospray ionization (ESI) was used for quantification. The fungicide was detected in the inner part of the apple one day after its application. The concentration of imazalil in the apple skin was reduced over the days. Seven days after application of the fungicide, a concentration of 0.015 ppm was found six millimeters inside the apple. The penetration rate of imazalil was approximately 1 mm per day.Os pesticidas são compostos utilizados em frutas e hortaliças com o objetivo de evitar danos causados por uma variedade de pestes. Geralmente, as técnicas empregadas na análise de pesticidas são a cromatografia gasosa acoplada à espectrometria de massas (GC-MS) e cromatografia líquida acoplada à espectrometria de massas (LC-MS). Ambas as técnicas apresentam elevados desempenhos analíticos, mas requerem laboriosas etapas de preparo de amostra antes da análise instrumental. A espectrometria de massas ambiente (AMS) é um grupo de técnicas que requer o mínimo ou nenhum preparo de amostra e emerge como alternativa para análise de pesticidas em alimentos. Este trabalho apresenta três capítulos que utilizam técnicas de AMS para análise de pesticidas em frutas ou hortaliças. Na primeira abordagem, as técnicas de AMS paper spray ionization (PSI) e leaf spray (LS) foram comparadas através de suas performances analíticas pelas análises dos pesticidas atrazina, diuron e metomil em alface, couve, manjericão, repolho e rúcula. Ambas as técnicas apresentaram desempelhos analíticos semelhantes. As curvas de calibração foram obtidas com R2>0,99 e limites de detecção (LOD) e quantificação (LOQ) na faixa de ppb. A segunda abordagem teve o objetivo de acoplar o molecularly imprinted polymer (MIP) com a PSI-MS para obter um método com maior seletividade. O MIP membrane spray ionization foi empregado nas análises dos pesticidas diuron e ácido diclorofenóxiacético (2,4-D) em extratos de maçãs, bananas e uvas. O método demonstrou maiores intensidades de sinal do diuron e 2,4-D em comparação com aqueles obtidos pelo non-imprinted polymer (NIP). As curvas de calibração exibiram linearidades com R2 >0,99 para os pesticidas em todos os extratos de frutas, e os LODs foram encontrados abaixo de 0,60 ppb e os LOQs abaixo de 2 ppb. Os valores de precisão e exatidão foram inferiores a 20% e os de recuperação variaram entre 92,5% e 116,9%. No capítulo posterior, matrix-assisted laser desorption ionization (MALDI) imaging foi combinada com a técnica ambiente infrared laser ablation sample transfer (IR-LAST) para verificar a penetração do fungicida imazalil em maçãs. MALDI imaging foi utilizada para obter informações da localização espacial do composto, enquanto que IR-LAST com análise offline por electrospray ionization (ESI) foi utilizada para quantificação. O fungicida foi detectado na parte interna da maçã um dia após a sua aplicação na casca. A concentração de imazalil na casca da maçã foi reduzida ao longo dos dias. Sete dias após a aplicação do fungicida, 0,015 ppm foram encontrados no sexto milímetro da região interna da maçã. 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No. of bitstreams: 2 Tese - Igor Pereira da Silva - 2018.pdf: 1618688 bytes, checksum: d41d5a23af5b24a9fa888a2203ca4be9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-12-04Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Química (IQ)UFGBrasilInstituto de Química - IQ (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessEspetrometria de massas ambientePesticidasPaper spray ionizationLeaf sprayInfrared laser ablation sample transferPesticidesAmbient mass spectrometryQUIMICA::QUIMICA ANALITICAEspectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentosAmbient mass spectrometry: new approaches for analysis of pesticides in foodsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis6636939213254151586006006006007826066743741197278-86616021054614395492075167498588264571reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.eng.fl_str_mv |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
dc.title.alternative.eng.fl_str_mv |
Ambient mass spectrometry: new approaches for analysis of pesticides in foods |
title |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
spellingShingle |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos Silva, Igor Pereira da Espetrometria de massas ambiente Pesticidas Paper spray ionization Leaf spray Infrared laser ablation sample transfer Pesticides Ambient mass spectrometry QUIMICA::QUIMICA ANALITICA |
title_short |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
title_full |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
title_fullStr |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
title_full_unstemmed |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
title_sort |
Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos |
author |
Silva, Igor Pereira da |
author_facet |
Silva, Igor Pereira da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Vaz, Boniek Gontijo |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7814534710550639 |
dc.contributor.referee1.fl_str_mv |
Vaz, Boniek Gontijo |
dc.contributor.referee2.fl_str_mv |
Augusti, Rodinei |
dc.contributor.referee3.fl_str_mv |
Lião, Luciano Morais |
dc.contributor.referee4.fl_str_mv |
Kato, Lucilia |
dc.contributor.referee5.fl_str_mv |
Nascimento, Abadia dos Reis |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7725440188541413 |
dc.contributor.author.fl_str_mv |
Silva, Igor Pereira da |
contributor_str_mv |
Vaz, Boniek Gontijo Vaz, Boniek Gontijo Augusti, Rodinei Lião, Luciano Morais Kato, Lucilia Nascimento, Abadia dos Reis |
dc.subject.por.fl_str_mv |
Espetrometria de massas ambiente Pesticidas |
topic |
Espetrometria de massas ambiente Pesticidas Paper spray ionization Leaf spray Infrared laser ablation sample transfer Pesticides Ambient mass spectrometry QUIMICA::QUIMICA ANALITICA |
dc.subject.eng.fl_str_mv |
Paper spray ionization Leaf spray Infrared laser ablation sample transfer Pesticides Ambient mass spectrometry |
dc.subject.cnpq.fl_str_mv |
QUIMICA::QUIMICA ANALITICA |
description |
Pesticides are compounds used on fruits and vegetables to avoid damage by pests. Usually, pesticide residue determination in fruits and vegetables has been performed by using gas chromatography coupled to mass spectrometry (GC-MS) and liquid chromatography coupled to mass spectrometry (LC-MS). Both techniques demonstrate excellent analytical performance but require laborious steps of sample preparation prior to instrumental analysis. Ambient mass spectrometry (AMS) is a group of techniques that requires minimal or no sample preparation and emerges as an alternative for analysis of pesticides in food. This work shows three chapters using AMS techniques for analysis of pesticides in fruits or vegetables. In the first approach, paper spray ionization (PSI) and leaf spray (LS) were compared by analyzing the pesticides atrazine, diuron and methomyl in lettuce, kale, basil, cabbage and arugula. Both techniques showed similar analytical performances. The calibration curves were obtained with R2>0.99 and the limits of detection (LOD) and quantification (LOQ) were found in ppb range. In the second approach, a molecularly imprinted polymer (MIP) was coupled to PSI-MS to obtain a selective method. MIP membrane spray ionization was employed for the analysis of diuron and 2,4-dichlorophenoxyacetic acid (2,4-D) in apple, banana and grape extracts. This method demonstrated higher signal intensities for diuron and 2,4-D in comparison to the non-imprinted polymer (NIP). The calibration curves were obtained with R2>0.99 for the pesticides in all fruit extracts, and the LODs were found below 0.60 ppb and LOQs below 2 ppb. The accuracy and precision values were lower than 20% and the values of recovery ranged from 92.5% to 116.9%. In the next chapter, matrix-assisted laser desorption ionization (MALDI) imaging was combined with infrared laser ablation sample transfer (IR-LAST) ambient technique to verify the penetration of the fungicide imazalil in apples. MALDI imaging was used to obtain information on the spatial location of the compound, whereas IR- LAST with electrospray ionization (ESI) was used for quantification. The fungicide was detected in the inner part of the apple one day after its application. The concentration of imazalil in the apple skin was reduced over the days. Seven days after application of the fungicide, a concentration of 0.015 ppm was found six millimeters inside the apple. The penetration rate of imazalil was approximately 1 mm per day. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018-12-04 |
dc.date.accessioned.fl_str_mv |
2019-01-23T10:12:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVA, Igor Pereira da. Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos. 2018. 113 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2018. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/9246 |
dc.identifier.dark.fl_str_mv |
ark:/38995/001300000bm03 |
identifier_str_mv |
SILVA, Igor Pereira da. Espectrometria de massas ambiente: novas abordagens para análise de pesticidas em alimentos. 2018. 113 f. Tese (Doutorado em Química) - Universidade Federal de Goiás, Goiânia, 2018. ark:/38995/001300000bm03 |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/9246 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
663693921325415158 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 |
dc.relation.department.fl_str_mv |
7826066743741197278 |
dc.relation.cnpq.fl_str_mv |
-8661602105461439549 |
dc.relation.sponsorship.fl_str_mv |
2075167498588264571 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.publisher.program.fl_str_mv |
Programa de Pós-graduação em Química (IQ) |
dc.publisher.initials.fl_str_mv |
UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Instituto de Química - IQ (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFG instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
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UFG |
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UFG |
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Repositório Institucional da UFG |
bitstream.url.fl_str_mv |
http://repositorio.bc.ufg.br/tede/bitstreams/3329a9ba-8a74-46b3-a53c-417c558527cf/download http://repositorio.bc.ufg.br/tede/bitstreams/bf2f1a2a-2d9a-4e16-b727-4f55a1fabb05/download http://repositorio.bc.ufg.br/tede/bitstreams/38b2eac7-3cf2-4502-97fc-193f52aac778/download http://repositorio.bc.ufg.br/tede/bitstreams/8e40f673-6593-41c6-93c1-23729df06c68/download http://repositorio.bc.ufg.br/tede/bitstreams/c27c377e-05b0-47d5-8f80-d26aae8d435e/download |
bitstream.checksum.fl_str_mv |
bd3efa91386c1718a7f26a329fdcb468 d41d5a23af5b24a9fa888a2203ca4be9 4afdbb8c545fd630ea7db775da747b2f d41d8cd98f00b204e9800998ecf8427e d41d8cd98f00b204e9800998ecf8427e |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
tasesdissertacoes.bc@ufg.br |
_version_ |
1811721485399621632 |