Monitoring some phenoxyl-type N-methylcarbamate pesticide residues in fruit juices using high-performance liquid chromatography with peroxyoxalate-chemiluminescence detection

Orejuela, Eva; Silva, Manuel

doi:10.1016/s0021-9673(03)00934-8

Cited by 62 publications

(26 citation statements)

References 14 publications

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“…For this reason, it is necessary to develop alternative strategies. Chemiluminescence (CL) detection has also been employed in carbamate determination coupled to flow injection (FI) or multicommutation methods 15,16 generally for the determination of a single pesticide, or coupled to LC [17][18][19] for the simultaneous determination of several carbamate pesticides (no more than four pesticides). Post-column luminol reaction, 17 based on the enhancing effect of carbaryl, carbofuran and methiocarb on the oxidation of luminol with permanganate in a basic medium, has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced chemiluminescence determination of carbamate pesticides

Catalá-Icardo

Lloret

Torres-Cartas

2016

Photochem Photobiol Sci

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Royal Society of ChemistryCatalá-Icardo, M.; Meseguer-Lloret, S.; Torres-Cartas, S. (2016 A liquid chromatography method with post-column photoinduced chemiluminescence (PICL) detection is proposed for the simultaneous determination of eight carbamate pesticides, namely aldicarb, butocarboxim, ethiofencarb, methomyl, methiocarb, thiodicarb, thiofanox and thiophanate-methyl. After chromatographic separation, quinine (sensitizer) was incorporated and the flow passed through an UV lamp (67 s of irradiation time) to obtain the photoproducts, which reacted qith acidic Ce(IV) and provided a CL emission. The PICL method showed great selectivity for carbamate pesticides containing sulphur in their chemical structure. A solid-phase extraction process increased sensitivity (LODs ranging from 0.06 to 0.27 ng mL -1) and allowed the carbamate pesticides in surface and ground water samples to be determined, with recoveries in the range 87-110% (except for thiophanate-methyl, whose recoveries were between 60 and 75%). The intraand inter-day precision was evaluated, with RSD ranging from 1.1 to 7.5% and from 2.6 to 12.3%, respectively. A discussion about the PICL mechanism is also included.

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Section: Introductionmentioning

confidence: 99%

Photoinduced chemiluminescence determination of carbamate pesticides

Catalá-Icardo

Lloret

Torres-Cartas

2016

Photochem Photobiol Sci

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“…11 Diante da necessidade do monitoramento de resíduos deste composto, a Agência Nacional de Vigilância Sanitária (ANVISA) 12 estabeleceu os limites máximos de resíduos (LMRs) permitidos para o carbaril em diferentes culturas agrícolas, sendo o valor, por exemplo, para a cultura de abacaxi de 500 µg kg -1 . Os resíduos de carbaril em amostras ambientais são geralmente determinados por técnicas cromatográficas [13][14][15][16][17] que incluem complicados pré-tratamentos ou clean-up das matrizes. Uma alternativa para essas análises são as técnicas eletroanalíticas empregando, por exemplo, eletrodos modificados [18][19][20][21][22] e DDB.…”

Section: Introductionunclassified

Potencialidades do uso de ultrassom na determinação do pesticida carbaril empregando eletrodos de diamante

Garbellini¹,

Avaca²,

Salazar‐Banda³

2010

Quím. Nova

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Recebido em 16/12/09; aceito em 8/6/10; publicado na web em 18/10/10 ULTRASOUND POTENTIALITIES ON THE DETERMINATION OF THE PESTICIDE CARBARYL USING DIAMOND ELECTRODES. The potentiality of the use of ultrasound radiation in association with a boron-doped diamond electrode was evaluated on the voltammetric determination of the pesticide carbaryl. Improvements in the sensitivity, limit of detection and reproducibility of the measurements were observed due to both, the enhancement of mass transport and the cleaning of the electrode surface provided by ultrasound. Satisfactory recovery levels for carbaryl in pure water (96-98%) and pineapple juice (89-92%) for quiescent and sonovoltammetric methodologies were obtained. These methodologies can be alternative tools for the analyses of pesticides in fruit samples, mainly the insonated condition that improve the analytical performance and dispense intermediary cleanings of the electrode surface.Keywords: boron-doped diamond; sonoelectroanalysis; food samples. INTRODUÇÃOA determinação eletroanalítica direta de compostos orgânicos tóxicos, como os pesticidas, em amostras de alimentos é fortemente prejudicada pela adsorção e/ou insolubilização de produtos da oxidação destes compostos na superfície de eletrodos e, também, pela grande quantidade de interferentes presentes nessas amostras, diminuindo deste modo a sensibilidade e a reprodutibilidade das medidas eletroquímicas.Uma possibilidade de minimizar esse fenômeno de inativação eletródica é o uso da radiação de ultrassom em associação a estudos voltamétricos.1,2 A introdução do ultrassom em sistemas eletroquímicos é caracterizada pelo significativo aumento do transporte de massa que melhora a sensibilidade analítica em comparação a medidas quiescentes. O uso de ultrassom promove também a ativação da superfície eletródica por meio do processo de cavitação, que consiste na criação, ampliação e implosão de cavidades de vapor e gases.3 Esta melhora do transporte de massa é devida ao colapso de bolhas perto ou na interface eletrodo-solução, com a formação de fluxos de altas velocidades direcionados à superfície eletródica e à movimentação da bolha na região próxima ou dentro da camada de difusão do eletrodo. É interessante ressaltar que os fluxos acústicos são os maiores responsáveis pelo fluxo convectivo até a interface sólido-líquido. Diante disso, o aumento do transporte do material eletroativo à superfície eletródica pode ser medido assumindo uma diminuição da espessura da camada de difusão (δ). 4Esses efeitos sinérgicos do ultrassom foram demonstrados na determinação de nitrito em água pura 5 e de pesticidas e subprodutos (metilparation e 4-nitrofenol) em amostras de alimentos 6,7 sobre o eletrodo de diamante dopado com boro (DDB). Desta maneira, decidiu-se explorar a potencialidade da associação do ultrassom ao eletrodo de DDB para a determinação do pesticida carbaril (pertencente ao grupo dos carbamatos). Codognoto et al.8 mostraram a determinação de carbaril em águas naturais via oxidação do nitrogênio amida da molécul...

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“…Considering the kinetic characteristics of this technique, it can be easily coupled to a flow-injection (FI) manifold as detection mode [16]. However, in pesticide residue control only few contributions have appeared using this detection mode, and particularly for the determination of carbamates, two different CL systems have been proposed, based on the tris (2,2 -bipyridyl)ruthenium(III) reaction [17,18] and on the peroxyoxalate CL oxidation in presence of a fluorophore [19]. The CL reaction based on the oxidation of luminol in alkaline medium by different oxidants, such as, hydrogen peroxide, molecular oxygen, hypochlorite, iodide or permanganate, mainly in the presence of some type of initiator or catalyst such as peroxidase, ferricyanide, heme compounds or metal ions (Co(II), Cu(II), Cr(III), Ni(II), etc.)…”

Section: Introductionmentioning

confidence: 99%

Chemiluminescence determination of carbofuran at trace levels in lettuce and waters by flow-injection analysis

Huertas-Pérez

Gámiz‐Gracia

Garcı́a-Campaña

et al. 2005

Talanta

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A simple, fast chemiluminescence (CL) flow-injection (FI) method based on the reaction of luminol with KMnO 4 in alkaline medium has been described for the direct determination of carbofuran. The method is based on the enhancing effect in the emission light from the oxidation of luminol produced in presence of carbofuran. The optimisation of instrumental and chemical variables influencing the CL response of the method has been carried out by applying experimental design, using the proposed flow-injection manifold. Under the optimal conditions, the CL intensity was linear for a carbofuran concentration over the range of 0.06-0.5 g ml −1 , with a detection limit of 0.02 g ml −1 . The method has been successfully applied to the determination of carbofuran residues in spiked water and lettuce samples.

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Monitoring some phenoxyl-type N-methylcarbamate pesticide residues in fruit juices using high-performance liquid chromatography with peroxyoxalate-chemiluminescence detection

Cited by 62 publications

References 14 publications

Photoinduced chemiluminescence determination of carbamate pesticides

Photoinduced chemiluminescence determination of carbamate pesticides

Potencialidades do uso de ultrassom na determinação do pesticida carbaril empregando eletrodos de diamante

Chemiluminescence determination of carbofuran at trace levels in lettuce and waters by flow-injection analysis

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