Simple and sensitive spectrophotometric determination of ziram, zineb and ferbam in commercial samples and foodstuffs using phenylfluorone

Abstract

A procedure has been developed for the determination of ziram, zineb and ferbam dithiocarbamate pesticides by converting ziram and zineb into a zinc-phenylfluorone complex and ferbam into an iron phenylfluorone complex, which are then dissolved in water in the presence of cetylpyridinium bromide and pyridine as a surfactant. The method is sensitive, highly selective and can be used for the determination of ziram, zineb and ferbam in commercial samples and in foodstuffs.

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.…”

H‐Point Standard Addition Method for Simultaneous Determination of Maneb and Zineb

“…In the past few years, direct determination of dithiocarbamates (without hot acid decomposition) have also been carried out by UV-visible spectrophotometry [7][8][9][10] , voltammetry 11,12 , high performance liquid chromatography 13 , capillary electrophoresis 14,15 , flame atomic absorption spectrometry 16,17 . Maneb and zineb have also been determined by converting it into molybdenum 18,19 and copper complexes 20 .…”

Flow Injection/Atomic Absorption Spectrometric Determination of Zineb in Commercial Formulations of Pesticide Based on Slurry Sampling

“…Afterwards, other researchers applied the same approach, just detecting the CS2 formed by several other instrumental techniques, such as head space gas chromatography, 6 differential pulse polarography, 7 Fourier-transform infrared spectrometry 8 or UV-visible spectrophotometry. [9][10][11] During the last ten years, direct determinations of zineb (without hot acid decomposition) have also been carried out by spectrophotometry, 12,13 16 used a C60 fullerene column for zineb preconcentration (among other dithiocarbamate pesticides) in a flow system. After elution with a 0.2 mol l -1 HNO3 solution, the pesticide was injected in a flame AAS and the zinc was detected for quantification purposes.…”

“…Afterwards, other researchers applied the same approach, just detecting the CS2 formed by several other instrumental techniques, such as head space gas chromatography, 6 differential pulse polarography, 7 Fourier-transform infrared spectrometry 8 or UV-visible spectrophotometry. [9][10][11] During the last ten years, direct determinations of zineb (without hot acid decomposition) have also been carried out by spectrophotometry, 12,13 voltammetry, 14 amperometry 15 or flame atomic absorption. 16 Malik et al 12 and Kapoor and Rao 13 carried out spectrophotometric determinations of zineb, converting the pesticide into zinc-phenylfluorone and zinc-PAR (4-(2-pyridilazo)resorcinol) complexes, respectively.…”

“…[9][10][11] During the last ten years, direct determinations of zineb (without hot acid decomposition) have also been carried out by spectrophotometry, 12,13 voltammetry, 14 amperometry 15 or flame atomic absorption. 16 Malik et al 12 and Kapoor and Rao 13 carried out spectrophotometric determinations of zineb, converting the pesticide into zinc-phenylfluorone and zinc-PAR (4-(2-pyridilazo)resorcinol) complexes, respectively. Ulakhovich et al 14 determined zineb in fruits, vegetables and aqueous samples by voltammetry after its solvent extraction with CH2Cl2, while Marty and Noguer 15 explored the inhibition effect of zineb on the aldehyde dehydrogenase enzyme for its determination by amperometry.…”