Flow injection-photoinduced-chemiluminescence determination of ziram and zineb

Analytica Chimica Acta
J L López Paz, M Catalá-Icardo

Abstract

A simple, sensitive and rapid method for the determination of the pesticides ziram and zineb was described. This new method was based on the coupling of FIA methodology and direct chemiluminescent detection; this approach had not been used up to now with these pesticides. The additional use of an 'on line' photochemical reaction, which was performed by using a photoreactor consisting of a long piece of PTFE helically coiled around a 15W low-pressure lamp, increased by a factor >20 the chemiluminometric response of the pesticides. An additional 3-fold improvement in the analytical signal was also achieved by using quinine as sensitizer. The obtained throughputs were very high (121 and 101 h(-1) for ziram and zineb, respectively); this feature together with its low limit of detection (1 ng mL(-1)) makes this method particularly well suited to routine analyses of environmental samples. On the other hand, its applicability to two members of the dithiocarbamate family of pesticides, makes it promising for the determination of the rest of the members of this family. The method was demonstrated by application to spiked water samples from different origins (ground, river and irrigation).

Citations

Jan 28, 2009·Analytical and Bioanalytical Chemistry·J L López-PazB Antón-Garrido
Oct 5, 2010·Analytical and Bioanalytical Chemistry·S Meseguer-LloretM C Gómez-Benito
Nov 29, 2011·Analytical and Bioanalytical Chemistry·S Torres-CartasS Meseguer-Lloret
Mar 19, 2011·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Mónica Catalá-IcardoAndrea Peña-Bádena
Oct 19, 2010·Analytica Chimica Acta·Francisco J LaraJean-Jacques Aaron

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