Flow injection-photoinduced-chemiluminescence determination of ziram and zineb

Abstract

López-Paz, JL.; Catalá-Icardo, M. (2008). Flow injection-photoinduced-chemiluminescence determination of ziram and zineb. Analytica Chimica Acta. 625 (2) ABSTRACTA 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 15 W 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).

A combination of dispersive liquid–liquid microextraction and surface plasmon resonance sensing of gold nanoparticles for the determination of ziram pesticide

“…In order to protect trees and ornamentals, ziram is added to bird and rodent repellents. It is also used as vulcanization accelerators and antioxidants in the rubber industry; preservative in adhesives, caulking, and sealants; and also applied as biocides for industrial or other commercial applications [1][2][3].…”

“…In addition, its ability to form strong complexes with trace elements, such as Cu(II), results in an increased trace elements uptake by aquatic organisms [4][5][6][7][8][9].With increasing use of DTC, ziram determination is imperative [10]. Various methods such as spectrophotometry [4,6,11,12], atomic absorption spectrometry [4], chromatography [12,13], electrochemistry [10,[14][15][16][17], FTIR spectrometry [7], and chemiluminescence [1,6] have been reported for the ziram determination. However, the standard procedure for ziram assay recommended by Official Methods of Analysis involves acid hydrolysis of this compound, followed by absorption of the produced CS 2 in a methanolic potassium hydroxide solution, and finally iodimetric titration of the formed xanthate [1].While analyzing the real sample, pretreatment plays a key role because sample contains complex matrix and the low concentrations of fungicides.…”

Simultaneous detection of zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate in cabbage leaves by capillary electrophoresis with inductively coupled plasma mass spectrometry

“…To date, several methods, such as colorimetric method [10], voltammetry [11], spectrophotometry [12][13][14][15][16][17][18][19], flow injectionphotoinduced-chemiluminescence [20], GC [21], and LC [22][23][24] have been reported for the detection of Ziram and Zineb. However, all of these methods suffer from one or more of the following disadvantages: complex operations, low sensitivity, a lack of the selectivity, and use of toxic solvents.…”

Flow injection photoinduced chemiluminescence determination of imazalil in water samples

“…In fact, flow injection photoinduced chemiluminescence has been recently used in the determination of sulphonamides [20], thiazides [21], pharmaceuticals [22,23] and pesticides [24,25] providing highly sensitive methods.…”