Catalá Icardo, M.; López Paz, JL.; Choves Barón, C.; Pena Badena, A. (2012). Native vs photoinduced chemiluminescence in dimethoate determination. ANALYTICA CHIMICA ACTA. 710:81-87. https://doi.org/10.1016/j.aca.2011.10.043
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/30825
Title:
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Native vs photoinduced chemiluminescence in dimethoate determination
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Author:
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Catalá Icardo, Mónica
López Paz, José Luis
Choves Barón, Cristina
Pena Badena, A.
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UPV Unit:
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Universitat Politècnica de València. Departamento de Química - Departament de Química
Universitat Politècnica de València. Instituto de Investigación para la Gestión Integral de Zonas Costeras - Institut d'Investigació per a la Gestió Integral de Zones Costaneres
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Issued date:
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Abstract:
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The determination of dimethoate using either its native chemiluminescent (CL) properties or its photoinduced chemiluminescence obtained by irradiation with a 15W low-pressure mercury lamp was studied. Thereby, two flow ...[+]
The determination of dimethoate using either its native chemiluminescent (CL) properties or its photoinduced chemiluminescence obtained by irradiation with a 15W low-pressure mercury lamp was studied. Thereby, two flow injection systems (FIA) with and without irradiation were exhaustively optimized and their analytical characteristics studied. Better sensitivity and selectivity was found in absence of irradiation, due to the enhancing effect of hexadecylpyridinium chloride (HPC), which acted as a sensitizer. In the developed FIA-CL system, the alkaline hydrolysis of dimethoate with NaOH was performed on-line in presence of HPC. The oxidation of the product of hydrolysis with Ce(IV) in hydrochloric medium induced chemiluminescence. The method provided a limit of detection of only 0.05ngmL -1 without any pre-treatment. However, the combination with solid phase extraction allowed the removal of some potential interferents as well as the preconcentration of the pesticide. Finally, the developed method was successfully applied to natural waters with recoveries between 95 and 108%. © 2011 Elsevier B.V.
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Subjects:
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Chemiluminescence
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Dimethoate
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Flow injection
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Photoreaction
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Water
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Alkaline hydrolysis
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Enhancing effect
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Flow-injection system
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Hexadecylpyridinium
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Interferents
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Limit of detection
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Low pressure mercury lamps
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Natural waters
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Photo-induced
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Photoreactions
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Pre-concentration
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Pre-Treatment
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Solid-phase extraction
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Chlorine compounds
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Hydrolysis
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Irradiation
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Mercury (metal)
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Water analysis
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Cerium
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Cetylpyridinium salt
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Mercury
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Sodium hydroxide
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Analytical parameters
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Article
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Chemical analysis
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Chemoluminescence
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Concentration (parameters)
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Controlled study
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Flow injection analysis
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Intermethod comparison
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Native chemoluminescence
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Oxidation
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Photoinduced chemoluminescence
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Priority journal
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Process optimization
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Reference value
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Sensitivity analysis
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Solid phase extraction
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Copyrigths:
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Reserva de todos los derechos
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Source:
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ANALYTICA CHIMICA ACTA. (issn:
0003-2670
)
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DOI:
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10.1016/j.aca.2011.10.043
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Publisher:
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ELSEVIER SCIENCE BV
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Publisher version:
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http://dx.doi.org/10.1016/j.aca.2011.10.043
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Project ID:
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info:eu-repo/grantAgreement/MEC//CTM2006-11991/ES/DESARROLLO DE METODOS SENCILLOS EN FLUJO CONTINUO CON DETECCION QUIMIOLUMINISCENTE APLICADOS AL CONTROL DE PLAGUICIDAS EN LOS CULTIVOS DE CITRICOS/
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Thanks:
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This work was supported by the Ministry of Education and Science of Spain (Project CTM2006-11991) and FEDER funds.
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Type:
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Artículo
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