Spectrophotometric determination of Zineb (a dithiocarbamate fungicide) by the methylene blue method

Agrawal, Vipin K; Shivhare, P.; Gupta, V. K.

doi:10.1007/bf00321846

Cited by 9 publications

(1 citation statement)

References 10 publications

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“…Many methods like spectrophotometry, 1,[3][4][5][6][7][8] flame atomic absorption spectrometry 9,10 FT-IR, 11 gas chromatography, 12,13 HPLC, [14][15][16] polarography, 17,18 biosensors, 19 and enzyme linked immuno sorbent assay 20 are available for Zineb determination and other dithiocarbamates. Most of the applied methods use different techniques like spectrophotometry and gas chromatography 3 based on analysis of CS 2 , H 2 S or amines which are evolved by the decomposition of EBDCs.…”

Section: Introductionmentioning

confidence: 99%

Development of a derivative spectrophotometric method for the determination of fungicide zinc ethylenebisdithiocarbamate using sodium molybdate

Kaur¹,

Kaur²,

Malik³

et al. 2009

J. Braz. Chem. Soc.

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Neste trabalho foi desenvolvido um procedimento espectrofotométrico derivativo para a determinação de etilenobisditiocarbamato de zinco(II), Zineb, com base na formação do complexo azul de molibdato de sódio em meio ácido. A lei de Beer é obedecida até 40 µg mL -1 de Zineb no comprimento de onda de 956 nm. O limite de detecção foi de 0,006 µg mL -1 de Zineb para a razão S/N = 3 considerando diversos parâmetros como o efeito da concentração de ácido. A interferência de diversos íons na determinação de Zineb foi avaliada. A maioria dos metais alcalinos e sais metálicos não causou interferências. O procedimento tem boa sensibilidade e foi empregado para a determinação de Zineb em amostras comerciais de alimentos contendo Dithane Z 78 e Hexathane 75% W.P.. Os resultados foram comparados com procedimentos previamente propostos. Zineb foi determinado com sucesso sem a ocorrência de interferências na presença de outros ditiocarbamatos, tais como Ziram, Thiram, Ferbam etc.A derivative spectrophotometric procedure was developed for the determination of zinc(II) ethylenebisdithiocarbamate, Zineb, after formation of its blue colored complex with sodium molybdate in acidic medium. The Beer's law is obeyed up to 40 µg mL -1 of Zineb at 956 nm. The detection limit was 0.006 µg mL -1 for Zineb when S/N ratio is 3 taking into account various parameters, such as the effect of acid concentration. The interference of a large number of ions on the determination of Zineb was evaluated. Most of the alkaline metals and metal salts did not interfere. The procedure presented proper sensitivity and it was applied for determining Zineb in food stuffs and commercial samples of Dithane Z 78 and Hexathane 75% W.P.. Results were compared with earlier reported methods. Zineb was successfully determined without any interferences in the presence of other dithiocarbamates like ziram, thiram, ferbam etc.

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Section: Introductionmentioning

confidence: 99%

Development of a derivative spectrophotometric method for the determination of fungicide zinc ethylenebisdithiocarbamate using sodium molybdate

Kaur¹,

Kaur²,

Malik³

et al. 2009

J. Braz. Chem. Soc.

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Ethylenebisthiocarbamates (Analysis)

Malik¹,

Cámara

2002

Encyclopedia of Agrochemicals

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Ethylenebisdithiocarbamates are widely used around the world to protect crops against different kinds of pests, and it is not surprising that these compounds can be detected at trace level in environmental samples. Stringent regulations have produced an increase in the number of methods developed for their determination. In this section, a brief introduction to the methods for the analysis of ethylenebisdithiocarbamate pesticides, followed by a more detailed discussion of individual methods, is presented. Analysis of ethylenebisdithiocarbamate residues and their decomposition products in foodstuffs, water, commercial samples, and various environmental samples using different techniques is the key feature of this article.

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Solid-state UV–MALDI–MS assay of transition metal dithiocarbamate fungicides

Ivanova

Spiteller

2013

Environ Sci Pollut Res

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The determination of transition metal containing dithiocarbamate fungicides represents a challenging aspect of analytical object. They have a low stability, low solubility and stabilize versatile coordination monomers, dimers, disulfides and/or S-oxidized derivatives. Their diverse biological activities and agricultural implementation encompass plant prevention and crop protection against a variety of plants containing fungi and diseases of 400 pathogens and 70 cultures. Nonetheless, those dithiocarbamates (DTCs) are banned for agricultural use in Europe or have expiration at years 2016-2017 because of their highly toxic degradation products and/or metabolites, in particular ethylene thiourea; they found large-scale implementations in materials research and medicine. Despite the broad interdisciplinary of DTC application, due to the above reasons, they have received little attention in the rapidly growing field of analytical chemistry, and in particular, the analytical mass spectrometry. Therefore, the study reported on qualitative, quantitative and structural analysis of ten DTCs (1-10), using the matrix assisted laser desorption/ionization (UV-MALDI)-Orbitrap-mass spectrometry (MS) contributed considerably to the implementation of the method for environmental and foodstuffs monitoring. Its ultrahigh resolving power and capacity for direct solid-state analysis, at limited number of sample pretreatment steps, at concentration levels of analytes of up to femtogram per gram resulted to achievement of a highly precise analytical information for these non-trivial objects. The presented fully validated method and technique is based on the successful ionization of DTCs embedded in three novel organic salts (M1-M3). In this regard, the reported MS and the single-crystal X-ray diffraction data as well as the quantum chemical one are able to correlate the molecular structures in condense and in the gas phase. Despite the novelty of the fundamental methodological character of the research reported, the promising metrology contributed to the applied aspect of the UV-MALDI-MS as a robust analytical method for environmental and foodstuffs monitoring, which is tested on two commercially available crop protecting products such as Mancozeb® and Antracol®, respectively.

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Spectrophotometric determination of Zineb (a dithiocarbamate fungicide) by the methylene blue method

Cited by 9 publications

References 10 publications

Development of a derivative spectrophotometric method for the determination of fungicide zinc ethylenebisdithiocarbamate using sodium molybdate

Development of a derivative spectrophotometric method for the determination of fungicide zinc ethylenebisdithiocarbamate using sodium molybdate

Ethylenebisthiocarbamates (Analysis)

Solid-state UV–MALDI–MS assay of transition metal dithiocarbamate fungicides

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