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Issue 5, 2016
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Photoinduced chemiluminescence determination of carbamate pesticides

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Abstract

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 with 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 intra- and 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.

Graphical abstract: Photoinduced chemiluminescence determination of carbamate pesticides

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Supplementary files

Article information


Submitted
25 Feb 2016
Accepted
08 Apr 2016
First published
11 Apr 2016

Photochem. Photobiol. Sci., 2016,15, 626-634
Article type
Paper
Author version available

Photoinduced chemiluminescence determination of carbamate pesticides

M. Catalá-Icardo, S. Meseguer-Lloret and S. Torres-Cartas, Photochem. Photobiol. Sci., 2016, 15, 626
DOI: 10.1039/C6PP00056H

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