Development of a photochemically induced fluorescence-based optosensor for the determination of imidacloprid in peppers and environmental waters

A novel flow-through solid phase spectroscopic assembly implemented with photochemically induced fluorescence (PIF) has been developed for the rapid, sensitive and selective determination of imidacloprid. The pesticide is derivatized on-line by irradiation with ultraviolet light providing an intensi...

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Published in:Talanta (Oxford) 2007-05, Vol.72 (3), p.991-997
Main Authors: LOPEZ FLORES, J, DIAZ, A. Molina, FERNANDEZ DE CORDOVA, M. L
Format: Article
Language:English
Subjects:
Analytical chemistry
Applied sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
General, instrumentation
Global environmental pollution
Imidacloprid
Optosensor
Other chromatographic methods
Peppers
Photochemically induced fluorescence
Pollution
Spectrometric and optical methods
Water
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DIAZ, A. Molina
FERNANDEZ DE CORDOVA, M. L
description A novel flow-through solid phase spectroscopic assembly implemented with photochemically induced fluorescence (PIF) has been developed for the rapid, sensitive and selective determination of imidacloprid. The pesticide is derivatized on-line by irradiation with ultraviolet light providing an intensively fluorescent compound. The determination is carried out by measuring the fluorescence intensity of the photoproduct once retained on C 18 silica gel filling the flow-cell. The method proposed has been applied to the determination of imidacloprid in natural waters and peppers. The quantification limit (QL) (0.015 mg kg −1) in peppers was lower than the maximum residue limit (MRL) established by Spanish Legislation (0.5 mg kg −1). The method also seems to be suitable for environmental water analysis providing satisfactory recoveries (94.0–108.6%). The results obtained in the analysis of real samples are in good agreement with those provided by a reference liquid chromatography (HPLC) method.
doi_str_mv 10.1016/j.talanta.2006.12.024
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subjects Analytical chemistry
Applied sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
General, instrumentation
Global environmental pollution
Imidacloprid
Optosensor
Other chromatographic methods
Peppers
Photochemically induced fluorescence
Pollution
Spectrometric and optical methods
Water
title Development of a photochemically induced fluorescence-based optosensor for the determination of imidacloprid in peppers and environmental waters
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