Base de dados : MEDLINE
Pesquisa : D02.705.400.625.320 [Categoria DeCS]
Referências encontradas : 336 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 34 ir para página                         

  1 / 336 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29431060
[Au] Autor:Goldoni A; Klauck CR; Puffal J; Ardenghi PG; da Silva LB
[Ad] Endereço:Grupo de Pesquisa em Indicadores de Qualidade Ambiental, Universidade Feevale, Novo Hamburgo, RS, Brasil.
[Ti] Título:DNA Damage in Wistar Rats Exposed to Organophosphate Pesticide Fenthion.
[So] Source:J Environ Pathol Toxicol Oncol;36(4):277-281, 2017.
[Is] ISSN:2162-6537
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In the last several decades, exposure to pesticides has become a concern to environmental and human health. Many pesticides are environmentally persistent and are characterized by varying degrees of toxicity and adverse effects, including DNA damage. The present study was undertaken to evaluate the genotoxic potential of organophosphate pesticide fenthion in Wistar rats, as assessed by the comet assay. Adult male Wistar rats were treated with a solution of fenthion at a concentration of 40 mg/kg/day, administered intraperitoneally for 18 consecutive days. Rats were killed 24 hours after the last pesticide administration, and the comet assay was performed in peripheral blood cells. The comet assay results revealed that the damage index (19.29 ± 3.59 vs. 7.80 ± 2.25) and the damage frequency (17.00 ± 3.46 vs. 7.5 ± 2.46) found in fenthion-treated rats were significantly higher than those found in the control group (p = 0.001 and p = 0.0006, respectively). The results show that fenthion affects the DNA integrity of rat cells and may induce DNA damage in exposed organisms.
[Mh] Termos MeSH primário: Dano ao DNA
Fention/toxicidade
Inseticidas/toxicidade
[Mh] Termos MeSH secundário: Animais
Ensaio Cometa
Masculino
Ratos
Ratos Wistar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Insecticides); BL0L45OVKT (Fenthion)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180213
[St] Status:MEDLINE
[do] DOI:10.1615/JEnvironPatholToxicolOncol.2017024241


  2 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27460958
[Au] Autor:Nwani CD; Somdare PO; Ogueji EO; Nwani JC; Ukonze JA; Nwadinigwe AO
[Ad] Endereço:a Molecular Biology and Biotechnology Division, Department of Zoology and Environmental Biology, University of Nigeria Nsukka , Nigeria.
[Ti] Título:Genotoxicity assessment and oxidative stress responses in freshwater African catfish Clarias gariepinus exposed to fenthion formulations.
[So] Source:Drug Chem Toxicol;40(3):273-280, 2017 Jul.
[Is] ISSN:1525-6014
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Fenthion is one of the most widely used organophosphate insecticides for the control of many varieties of pests in Nigeria. The genotoxic effect of the pesticide was evaluated in the blood erythrocytes of Clarias gariepinus using the micronucleus (MN) test. The oxidative stress parameters were also studied in the liver and gill tissues. Fish were exposed to 2.0, 4.0, and 8.0 mgL of fenthion and sampling was done on days 1, 7, 14, 21 and after 7-day recovery. Micronuclei induction was highest (7.55) on day 14 at all concentrations in the peripheral blood cells. Oxidative stress was evidenced by increased lipid peroxidation (LPO). Maximum LPO values of 62.47% and 71.17% were observed in the gill and liver tissues respectively in C. gariepinus exposed to 8.0 mgL concentration of fenthion. There were alterations in the values of reduced glutathione (GSH), glutathione reductase (GR), glutathione peroxidase (GPx), superoxide dismutase (SOD), and catalase (CAT) during the exposure and recovery periods. The 7-day recovery period was not adequate to eliminate fenthion-induced changes as LPO, CAT, and GR activity remain elevated. However, MN frequency and activity of SOD, GSH, and GPx (except at 8.0 mgL ) recovered. The present findings give further credence on the integrated use of MN test and oxidative stress parameters in risk assessment of pollutants in aquatic ecosystem.
[Mh] Termos MeSH primário: Peixes-Gato/sangue
Fention/toxicidade
Inseticidas/toxicidade
Micronúcleos com Defeito Cromossômico/induzido quimicamente
Mutagênicos/toxicidade
Estresse Oxidativo/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Antioxidantes/metabolismo
Peixes-Gato/genética
Relação Dose-Resposta a Droga
Eritrócitos/efeitos dos fármacos
Eritrócitos/enzimologia
Eritrócitos/metabolismo
Fention/química
Água Doce/química
Inseticidas/química
Micronúcleos com Defeito Cromossômico/estatística & dados numéricos
Testes para Micronúcleos
Mutagênicos/química
Nigéria
Estresse Oxidativo/genética
Poluentes Químicos da Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Insecticides); 0 (Mutagens); 0 (Water Pollutants, Chemical); BL0L45OVKT (Fenthion)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170906
[Lr] Data última revisão:
170906
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160728
[St] Status:MEDLINE
[do] DOI:10.1080/01480545.2016.1209772


  3 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:27764572
[Au] Autor:Nwani CD; Somdare PO; Ukonze JA; Ejere VC; Nwadinigwe AO; Nwani JC; Odo GE; Ugbor ON
[Ad] Endereço:a Department of Zoology and Environmental Biology , University of Nigeria , Nsukka , Nigeria.
[Ti] Título:Subchronic Exposure to Fenthion Induces Hematological Changes in Liver Tissue of African Catfish Clarias gariepinus.
[So] Source:J Aquat Anim Health;28(4):229-234, 2016 12.
[Is] ISSN:1548-8667
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this study, African Catfish (also known as Sharptooth Catfish) Clarias gariepinus were exposed to sublethal concentrations of fenthion of 2.0, 4.0, and 8.0 mg/L for 21 d and allowed to recover for 7 d to investigate the potential for hematological changes. Whole blood was sampled on days 1, 7, 14, and 21 postexposure and after a 7-d recovery period. During exposure, fenthion caused a reduction in red blood cell counts, hemoglobin concentration, and packed cell volume. There was an increase in white blood cell counts but no significant difference in mean corpuscular hemoglobin concentration, mean corpuscular volume, and mean corpuscular hemoglobin. Both increases and decreases were observed in white blood cell differentials. After the 7-d recovery period, both increases and decreases were observed in the hematological parameters. These results reveal that sublethal concentrations of fenthion can cause hematological alterations in African Catfish and that the substance should be used with caution. Received October 20, 2015; accepted May 4, 2016.
[Mh] Termos MeSH primário: Peixes-Gato/sangue
Fention/toxicidade
Inseticidas/toxicidade
Fígado/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Peixes-Gato/metabolismo
Feminino
Testes Hematológicos/veterinária
Fígado/irrigação sanguínea
Masculino
Testes de Toxicidade Subcrônica/veterinária
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Insecticides); 0 (Water Pollutants, Chemical); BL0L45OVKT (Fenthion)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170628
[Lr] Data última revisão:
170628
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161021
[St] Status:MEDLINE


  4 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:26231893
[Au] Autor:Dong J; Hou J; Jiang J; Ai S
[Ad] Endereço:College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong 271018, China.
[Ti] Título:Innovative approach for the electrochemical detection of non-electroactive organophosphorus pesticides using oxime as electroactive probe.
[So] Source:Anal Chim Acta;885:92-7, 2015 Jul 23.
[Is] ISSN:1873-4324
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:An innovative approach for sensitive and simple electrochemical detection of non-electroactive organophosphorus pesticides (OPs) was described in this report. The novel strategy emphasized the fabrication of an oxime-based sensor via attaching pralidoxime (PAM) on graphene quantum dots (GQDs) modified glassy carbon electrode. The introduction of GQDs significantly increased the effective electrode area, and then enlarged the immobilization quantity of PAM. Thus, the oxidation current of PAM was obviously increased. Relying on the nucleophilic substitution reaction between oxime and OPs, fenthion was detected using PAM as the electroactive probe. Under optimum conditions, the difference of oxidation current of PAM was proportional to fenthion concentration over the range from 1.0×10(-11)M to 5.0×10(-7)M with a detection limit of 6.8×10(-12)M (S/N=3). Moreover, the favorable detection performance in water and soil samples heralded the promising applications in on-site OPs detection.
[Mh] Termos MeSH primário: Técnicas Eletroquímicas/métodos
Fention/análise
Compostos Organofosforados/análise
Oximas/química
Praguicidas/análise
Poluentes do Solo/análise
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Monitoramento Ambiental/métodos
Grafite/química
Limite de Detecção
Compostos de Pralidoxima/química
Pontos Quânticos/química
Pontos Quânticos/ultraestrutura
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Organophosphorus Compounds); 0 (Oximes); 0 (Pesticides); 0 (Pralidoxime Compounds); 0 (Soil Pollutants); 0 (Water Pollutants, Chemical); 7782-42-5 (Graphite); BL0L45OVKT (Fenthion); P7MU9UTP52 (pralidoxime)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:150803
[Lr] Data última revisão:
150803
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150802
[St] Status:MEDLINE


  5 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:25468670
[Au] Autor:Corrêa RR; Lopes WD; Teixeira WF; Cruz BC; Gomes LV; Felippelli G; Maciel WG; Fávero FC; Buzzulini C; Bichuette MA; Soares VE; da Costa AJ
[Ad] Endereço:Faculdade de Ciências Agrárias e Veterinárias, UNESP/CPPAR, Via de acesso prof. Paulo Donatto Castellani, s/n CEP:14884-900, Jaboticabal, São Paulo, Brazil.
[Ti] Título:A comparison of three different methodologies for evaluating Rhipicephalus (Boophilus) microplus susceptibility to topical spray compounds.
[So] Source:Vet Parasitol;207(1-2):115-24, 2015 Jan 15.
[Is] ISSN:1873-2550
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:This study aimed to compare three different methodologies (Adult Immersion Tests, field trials with naturally infected animals, and a Stall Test using artificially infested cattle) to evaluate the efficacy of two topical formulations that we administered as whole body sprays (15% Cypermethrin+30% Chlorpyriphos+15% Fenthion-Colosso(®) FC 30, Ouro Fino Agronegócios; and 60% Dichlorvos+20% Chlorpyriphos-Ectofós(®), Vallée Saúde Animal Ltd.), against a susceptible strain of Rhipicephalus (Boophilus) microplus. To achieve this objective, two natural infestation trials were conducted, as well as two artificial infestation trials (Stall Tests) and two Adult Immersion Tests (AIT). The AIT results showed that both spray formulations achieved 100% efficacy against R. (B.) microplus fully engorged females. However, when observing results obtained by field trials (natural infestations) and Stall Tests, none of these topically applied compounds reached 100% efficacy or affected the reproductive capacity of the fully engorged female ticks. Additional studies must be conducted to compare these in vivo methodologies with different in vitro techniques, such as the Larval Packet Test. However, based on results obtained here, we can conclude that depending on the spray formulations used, the AIT can overestimate acaricidal efficacy and values of reproductive efficiency of such compounds against R (B.) microplus. Specifically, when dealing with spray formulations in the Stall Tests, the period of residual action can increase because these animals are sheltered from contact with environmental factors that might interfere with the efficacy of the products tested. It may be necessary to take in vivo trial results into consideration (such as field trials with naturally infested animals or Stall Tests) to standardize a specific in vitro assay, such as the Adult Immersion Test.
[Mh] Termos MeSH primário: Acaricidas/farmacologia
Doenças dos Bovinos/tratamento farmacológico
Rhipicephalus/efeitos dos fármacos
Infestações por Carrapato/veterinária
[Mh] Termos MeSH secundário: Acaricidas/administração & dosagem
Administração Tópica
Aerossóis
Animais
Bovinos
Doenças dos Bovinos/parasitologia
Clorpirifos/administração & dosagem
Diclorvós/administração & dosagem
Combinação de Medicamentos
Feminino
Fention/administração & dosagem
Larva
Masculino
Piretrinas/administração & dosagem
Reprodução/efeitos dos fármacos
Rhipicephalus/fisiologia
Infestações por Carrapato/tratamento farmacológico
Infestações por Carrapato/parasitologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Acaricides); 0 (Aerosols); 0 (Drug Combinations); 0 (Pyrethrins); 1TR49121NP (cypermethrin); 7U370BPS14 (Dichlorvos); BL0L45OVKT (Fenthion); JCS58I644W (Chlorpyrifos)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170228
[Lr] Data última revisão:
170228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141204
[St] Status:MEDLINE


  6 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:25296500
[Au] Autor:Ben Amara I; Sefi M; Troudi A; Soudani N; Boudawara T; Zeghal N
[Ti] Título:Fenthion, an organophosphorus pesticide, induces alterations in oxidant/antioxidant status and histopathological disorders in cerebrum and cerebellum of suckling rats.
[So] Source:Indian J Biochem Biophys;51(4):293-301, 2014 Aug.
[Is] ISSN:0301-1208
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:Fenthion (FEN) is an organophosphorus pesticide known for its wide toxic manifestations. In this study, the effects of FEN were evaluated on the cerebrum and cerebellum oxidant/antioxidant status and histopathological disorders in the suckling rats. Pregnant rats were divided into two groups: control group received pure water, while FEN group received daily by their drinking water 551 ppm of FEN from the 14th day of pregnancy until day 14 after delivery. Acetylcholine esterase (AChE) activity was inhibited in both the cerebrum and cerebellum of suckling rats whose mothers were treated with FEN. The cerebrum and cerebellum oxidative damage was demonstrated by a significant increase of malondialdehyde (MDA), advanced oxidation protein product and glutathione (GSH) levels and disturbance in the antioxidant enzyme activities. A significant decline of non-protein thiol and vitamin C levels was also observed. These changes were confirmed by histopathological observations which were marked by pyknotic neurons in the cerebrum and apoptotic cells in the cerebellum of FEN-treated rats. In the cerebellum of FEN-treated rats, the most conspicuous damage was the absence of external granular layer, indicating growth retardation. These data suggested that exposure of pregnant and lactating rats to FEN induced oxidative stress and histopathological disorders in the cerebrum and cerebellum of their pups. Thus, the use of FEN must be under strict control, especially for pregnant and lactating mothers.
[Mh] Termos MeSH primário: Antioxidantes/metabolismo
Encéfalo/efeitos dos fármacos
Fention/toxicidade
Inseticidas/toxicidade
Oxidantes/metabolismo
[Mh] Termos MeSH secundário: Animais
Animais Lactentes
Encéfalo/metabolismo
Encéfalo/patologia
Feminino
Masculino
Ratos
Ratos Wistar
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antioxidants); 0 (Insecticides); 0 (Oxidants); BL0L45OVKT (Fenthion)
[Em] Mês de entrada:1410
[Cu] Atualização por classe:141009
[Lr] Data última revisão:
141009
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141010
[St] Status:MEDLINE


  7 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:24932803
[Au] Autor:Xu J; Luo J; Ruan J; Zhu F; Luan T; Liu H; Jiang R; Ouyang G
[Ad] Endereço:MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275 Guangdong, China.
[Ti] Título:In vivo tracing uptake and elimination of organic pesticides in fish muscle.
[So] Source:Environ Sci Technol;48(14):8012-20, 2014 Jul 15.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Bioconcentration factors (BCFs) measured in the laboratory are important for characterizing the bioaccumulative properties of chemicals entering the environment, especially the potential persistent organic pollutants (POPs), which can pose serious adverse effects on ecosystem and human health. Traditional lethal analysis methods are time-consuming and sacrifice too many experimental animals. In the present study, in vivo solid-phase microextraction (SPME) was introduced to trace the uptake and elimination processes of pesticides in living fish. BCFs and elimination kinetic coefficients of the pesticides were recorded therein. Moreover, the metabolism of fenthion was also traced with in vivo SPME. The method was time-efficient and laborsaving. Much fewer experimental animals were sacrificed during the tracing. In general, this study opened up an opportunity to measure BCFs cheaply in laboratories for the registering of emerging POPs and inspecting of suspected POPs, as well as demonstrated the potential application of in vivo SPME in the study of toxicokinetics of pollutants.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Músculos/metabolismo
Compostos Orgânicos/metabolismo
Praguicidas/metabolismo
Tilápia/metabolismo
[Mh] Termos MeSH secundário: Animais
Fention/metabolismo
Seres Humanos
Hidrocarbonetos Clorados/metabolismo
Microextração em Fase Sólida
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hydrocarbons, Chlorinated); 0 (Organic Chemicals); 0 (Pesticides); BL0L45OVKT (Fenthion)
[Em] Mês de entrada:1410
[Cu] Atualização por classe:140715
[Lr] Data última revisão:
140715
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140617
[St] Status:MEDLINE
[do] DOI:10.1021/es5009032


  8 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:24840449
[Au] Autor:Bakas I; Ben Oujji N; Istamboulié G; Piletsky S; Piletska E; Ait-Addi E; Ait-Ichou I; Noguer T; Rouillon R
[Ad] Endereço:Univ. Perpignan Via Domitia, IMAGES EA4218, 52 Av. Paul Alduy, F-66860 Perpignan, France; Laboratoire AQUAMAR, Equipe Matériaux Photocatalyse et Environnement, Faculté des Sciences, Université Ibn Zohr, B.P. 8106 Cité Dakhla, Agadir, Maroc. Electronic address: idrissbakas@gmail.com.
[Ti] Título:Molecularly imprinted polymer cartridges coupled to high performance liquid chromatography (HPLC-UV) for simple and rapid analysis of fenthion in olive oil.
[So] Source:Talanta;125:313-8, 2014 Jul.
[Is] ISSN:1873-3573
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A combination of molecular modelling and a screening of the library of non-imprinted polymers (NIPs) was used to identify acrylamide as a functional monomer with high affinity towards fenthion, organophosphate insecticide, which is frequently used in the treatment of olives. A good correlation was found between the screening tests and modelling of monomer-template interactions performed using a computational approach. Acrylamide-based molecularly imprinted polymer (MIP) and non-imprinted polymer (NIP) were thermally synthesised in dimethyl formamide (porogen) using ethylene glycol dimethacrylate as a cross-linker and 1,1-azo-bis (isobutyronitrile) as an initiator. The chemical and physical properties of the prepared polymers were characterised. The binding of fenthion by the polymers was studied using solvents with different polarities. The developed MIP showed a high selectivity towards fenthion, compared to other organophosphates (dimethoate, methidathion malalthion), and allowed extraction of fenthion from olive oil samples with a recovery rate of about 96%. The extraction of fenthion using MIPs was much more effective than traditional C18 reverse-phase solid phase extraction and allowed to achieve a low detection limit (LOD) (5 µg L(-1)).
[Mh] Termos MeSH primário: Cromatografia Líquida de Alta Pressão
Fention/análise
Inseticidas/análise
Impressão Molecular/métodos
Polímeros/química
[Mh] Termos MeSH secundário: Acetonitrilos/química
Técnicas de Química Analítica
Contaminação de Alimentos/análise
Limite de Detecção
Modelos Moleculares
Azeite de Oliva
Óleos Vegetais/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Acetonitriles); 0 (Insecticides); 0 (Olive Oil); 0 (Plant Oils); 0 (Polymers); BL0L45OVKT (Fenthion); Z072SB282N (acetonitrile)
[Em] Mês de entrada:1505
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140521
[St] Status:MEDLINE


  9 / 336 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:24694705
[Au] Autor:Li X; Zhang S; Yu Z; Yang T
[Ad] Endereço:School of Science, Shenyang Ligong University, Liaoning Shenyang 110159, P.R. China.
[Ti] Título:Surface-enhanced Raman spectroscopic analysis of phorate and fenthion pesticide in apple skin using silver nanoparticles.
[So] Source:Appl Spectrosc;68(4):483-7, 2014.
[Is] ISSN:1943-3530
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Traditional pesticide residue detection methods are usually complicated, time consuming, and expensive. Rapid, portable, online, and real-time detection kits are the developing direction of pesticide testing. In this paper, we used a surface-enhanced Raman spectroscopy (SERS) technique to detect the organophosphate pesticide residue of phorate and fenthion in apple skin, for the purpose of finding a fast, simple, and convenient detection method for pesticide detection. The results showed that the characteristic wavenumbers of the two organophosphorus pesticides are more easily identified using SERS. We selected the Raman peaks at 728 cm(-1) of phorate and 1215 cm(-1) of fenthion as the target peaks for quantitative analysis, and utilized internal standards to establish linear regression models for phorate and fenthion. The detection limit was 0.05 mg/L for phorate and 0.4 mg/L for fenthion. This method can be used as a quantitative analytical reference for the detection of phorate and fenthion.
[Mh] Termos MeSH primário: Fention/análise
Malus/química
Nanopartículas Metálicas/química
Forato/análise
Análise Espectral Raman/métodos
[Mh] Termos MeSH secundário: Modelos Lineares
Resíduos de Praguicidas/análise
Prata/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Pesticide Residues); 3M4G523W1G (Silver); 3W54X3W9IV (Phorate); BL0L45OVKT (Fenthion)
[Em] Mês de entrada:1412
[Cu] Atualização por classe:150522
[Lr] Data última revisão:
150522
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140404
[St] Status:MEDLINE
[do] DOI:10.1366/13-07080


  10 / 336 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:24528846
[Au] Autor:Jafari MT; Saraji M; Sherafatmand H
[Ad] Endereço:Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran. Electronic address: jafari@cc.iut.ac.ir.
[Ti] Título:Polypyrrole/montmorillonite nanocomposite as a new solid phase microextraction fiber combined with gas chromatography-corona discharge ion mobility spectrometry for the simultaneous determination of diazinon and fenthion organophosphorus pesticides.
[So] Source:Anal Chim Acta;814:69-78, 2014 Mar 03.
[Is] ISSN:1873-4324
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A novel solid phase microextraction (SPME) fiber was prepared and coupled with gas chromatography corona discharge ion mobility spectrometry (GC-CD-IMS) based on polypyrrole/montmorillonite nanocomposites for the simultaneous determination of diazinon and fenthion. The nanocomposite polymer was coated using a three-electrode electrochemical system and directly deposited on a Ni-Cr wire by applying a constant potential. The scanning electron microscopy images revealed that the new fiber exhibited a rather porous and homogenous surface. The thermal stability of the fabricated fiber was investigated by thermogravimetric analysis. The effects of different parameters influencing the extraction efficiency such as extraction temperature and time, salt addition, stirring rate, the amount of nanoclay, and desorption temperature were investigated and optimized. The method was exhaustively evaluated in terms of sensitivity, recovery, and reproducibility. The linearity ranges of 0.05-10 and 0.08-10 µg L(-1), and the detection limits of 0.020 and 0.035 µg L(-1) were obtained for diazinon and fenthion, respectively. The relative standard deviation values were calculated to be lower than 5% and 8% for intra-day and inter-day, respectively. Finally, the developed method was applied to determine the diazinon and fenthion (as model compounds) in cucumber, lettuce, apple, tap and river water samples. The satisfactory recoveries revealed the capability of the two-dimensional separation technique (retention time in GC and drift time in IMS) for the analysis of complex matrices extracted by SPME.
[Mh] Termos MeSH primário: Bentonita/química
Diazinon/análise
Fention/análise
Praguicidas/análise
Polímeros/química
Pirróis/química
Microextração em Fase Sólida/instrumentação
[Mh] Termos MeSH secundário: Desenho de Equipamento
Cromatografia Gasosa-Espectrometria de Massas/instrumentação
Limite de Detecção
Nanocompostos/química
Reprodutibilidade dos Testes
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Pesticides); 0 (Polymers); 0 (Pyrroles); 1302-78-9 (Bentonite); 30604-81-0 (polypyrrole); BL0L45OVKT (Fenthion); YUS1M1Q929 (Diazinon)
[Em] Mês de entrada:1410
[Cu] Atualização por classe:140217
[Lr] Data última revisão:
140217
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140218
[St] Status:MEDLINE



página 1 de 34 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde