Ethylenebisthiocarbamates (Analysis)

Malik, Ashok Kumar; Cámara, Carmen

doi:10.1002/047126363x.agr075

Cited by 1 publication

(1 citation statement)

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“…It is a non-systemic (surface acting) fungicide, commercially available as wettable powder, dust formulations and also in mixture with other fungicides under trade names like Dithane Z-78, Amitan etc. Like other EBDCs, it also shows strong metal binding properties 1,2 and hence is capable of blocking enzymes and affecting biological systems. Even the breakdown products of Zineb, viz.…”

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%