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Microbiological and chemical quality of portuguese lettuce - results of a case study

2020Journal article Open access
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dc.contributor.authorFerreira, Catarina
dc.contributor.authorLopes, Filipa
dc.contributor.authorCosta, Reginaldo
dc.contributor.authorKomora, Norton
dc.contributor.authorFerreira, Vânia
dc.contributor.authorFernandes, Virgínia Cruz
dc.contributor.authorDelerue-Matos, Cristina
dc.contributor.authorTeixeira, Paula
dc.date.accessioned2020-10-13T13:47:49Z
dc.date.available2020-10-13T13:47:49Z
dc.date.issued2020
dc.description.abstractIn addition to environmental pollution issues, social concerns about the sustainability, safety, and quality of conventionally grown fruits and vegetables have been increasing. In order to evaluate if there were any microbiological differences between samples of organic and conventional lettuce, a wide range of parameters were tested, including pathogens and indicator organisms: the enumeration of Escherichia coli; the detection of Salmonella spp.; the detection/enumeration of Listeria monocytogenes; the enumeration of lactic acid bacteria, Pseudomonas spp. yeasts and molds, and Enterobacteriaceae. This study also evaluated the chemical safety of the lettuce samples, quantifying the nitrate concentration and 20 pesticides (14 organochlorine and 6 organophosphorus pesticides). Significant differences (p<0.05) between the conventional and organic samples were only detected for the counts of total microorganisms at 30◦C. Pathogens were absent in all the samples. The analytical method, using the quick, easy, cheap, effective, rugged, and safe (QuEChERS) approach for pesticide extraction, was suitable for detecting the targeted analyte s; the limit of quantification(LOQ) was between 0.6 and 1.8μg/kg (lower than the Maximum Residue Levels (MRLs) established by EU legislation). In three organic lettuce samples, one organochlorine pesticide (α-HCH) was observed below the MRLs. For the samples analyzed and for the parameters investigated, except for the total mesophilic counts, the organic and conventional lettuces were not different.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFerreira, C., Lopes, F., Costa, R., Komora, N., Ferreira, V., Cruz Fernandes, V., ... Teixeira, P. (2020). Microbiological and chemical quality of portuguese lettuce - results of a case study. Foods, 9(9), art. n.º 1274pt_PT
dc.identifier.doi10.3390/foods9091274pt_PT
dc.identifier.eid85091448961
dc.identifier.issn2304-8158
dc.identifier.pmcPMC7555633
dc.identifier.pmid32932798
dc.identifier.urihttp://hdl.handle.net/10400.14/31097
dc.identifier.wos000581424900001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationCentre for Biotechnology and Fine Chemistry
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationFruitec-Modern analytical technologies for assess Persistent and Emergent Organic Pollutants in red fruits
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectOrganic producept_PT
dc.subjectMicrobiological contaminationpt_PT
dc.subjectChemical contaminationpt_PT
dc.subjectFoodbornepathogenspt_PT
dc.subjectPesticide residuespt_PT
dc.titleMicrobiological and chemical quality of portuguese lettuce - results of a case studypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Biotechnology and Fine Chemistry
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleFruitec-Modern analytical technologies for assess Persistent and Emergent Organic Pollutants in red fruits
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F50016%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POR_NORTE/SFRH%2FBPD%2F109153%2F2015/PT
oaire.citation.issue9pt_PT
oaire.citation.titleFoodspt_PT
oaire.citation.volume9pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamPOR_NORTE
person.familyNameKomora
person.familyNameBorges Ferreira
person.familyNameFernandes
person.familyNameDelerue-Matos
person.familyNameTeixeira
person.givenNameNorton
person.givenNameVânia
person.givenNameVirgínia
person.givenNameCristina
person.givenNamePaula
person.identifier.ciencia-idD114-BCFA-5EEB
person.identifier.ciencia-id5A16-3713-E0CE
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person.identifier.orcid0000-0002-1118-3629
person.identifier.orcid0000-0001-7093-9193
person.identifier.orcid0000-0003-3979-7523
person.identifier.orcid0000-0002-3924-776X
person.identifier.orcid0000-0002-6296-5137
person.identifier.ridK-1343-2014
person.identifier.ridG-4985-2010
person.identifier.ridD-4990-2013
person.identifier.ridJ-8678-2014
person.identifier.scopus-author-id57039111500
person.identifier.scopus-author-id8317338900
person.identifier.scopus-author-id37045954500
person.identifier.scopus-author-id6603741848
person.identifier.scopus-author-id7005895206
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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