Dithiocarbamate
Mostrando 1-12 de 66 artigos, teses e dissertações.
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1. Dithiocarbamate Residues in Fruits and Leaves of Passion Fruit (Passiflora edulis) from Different Brazilian Regions
Dithiocarbamates are widely used fungicides, including in passion fruit, whose fruits are mainly used for juice production, the leaves for the preparation of herbal tea and medicines. Also, the use of the peel in the food industry has been proposed. In this study, the spectrophotometric method for determination of dithiocarbamate residues, as CS2, in passion
J. Braz. Chem. Soc.. Publicado em: 16/09/2019
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2. Determination of Traces of Ni, Cu, and Zn in Wastewater and Alloy Samples by Flame-AAS after Ionic Liquid-Based Dispersive Liquid Phase Microextraction
A procedure has been developed for simultaneous separation/preconcentration of copper, nickel, and zinc based on in situ ionic liquid-based dispersive liquid-liquid microextraction method as a prior step to their determination by flame atomic absorption spectrometry. The analytes reacted with sodium diethyl dithiocarbamate at pH 7 to form hydrophobic chelate
J. Braz. Chem. Soc.. Publicado em: 2017-05
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3. Comparison Between Three Chromatographic (GC-ECD, GC-PFPD and GC-ITD-MS) Methods and a UV-Vis Spectrophotometric Method for the Determination of Dithiocarbamates in Lettuce
The purpose of this study was to compare the performance of gas chromatographic with electron capture detector, pulsed flame photometric detector and mass spectrometry (GC-ECD, GC-PFPD and GC-MS) and UV-Vis spectrophotometric methods, based on acidic hydrolysis with tin(II) chloride of dithiocarbamate and analysis of the evolved CS2. For the validation studi
J. Braz. Chem. Soc.. Publicado em: 2017-05
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4. Speciation of Chromium in Water Samples after Dispersive Liquid-Liquid Microextraction, and Detection by Means of High-Resolution Continuum Source Atomic Absorption Spectrometry
A newly analytical method has been developed to determine total chromium and speciation of this element in water samples through dispersive liquid-liquid microextraction combined with a high-resolution continuum source flame atomic absorption spectrometry. The most significant variables affecting complexation and extraction were optimized by using response s
J. Braz. Chem. Soc.. Publicado em: 2017-02
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5. RAPID AND SENSITIVE DETERMINATION OF PALLADIUM USING HOMOGENEOUS LIQUID-LIQUID MICROEXTRACTION VIA FLOTATION ASSISTANCE FOLLOWED BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY
A method for the determination of trace amounts of palladium was developed using homogeneous liquid-liquid microextraction via flotation assistance (HLLME-FA) followed by graphite furnace atomic absorption spectrometry (GFAAS). Ammonium pyrrolidine dithiocarbamate (APDC) was used as a complexing agent. This was applied to determine palladium in three types o
Quím. Nova. Publicado em: 2015-05
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6. Estudo estrutural e estereoquímico de derivados de ditiocarbamatos: supramolecularidade / Structural and stereochemistry analysis of dithiocarbamate derivates: an influence of the supramolecularity
Ditiocarbamatos (DTC) tem uma vasta gama de aplicação. Na indústria são usados como ativos para vulcanização da borracha; lubrificantes e anticorrosivos para trabalhos em alta pressão. Na medicina são estudados como potenciais inibidores do fator nuclear kappa β (NF-KB) e da protease do HIV-1; além da aplicação como indutores da apoptose em v
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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7. Evaluation of residues of dithiocarbonate pesticides in the soil of a culture of cabbage (Brassico Oleracea L.) using L-cystine hydrochloride for preservation of samples / Avaliação dos teores de resíduos do pesticida ditiocarbamato no solo de uma cultura de couve (Brassica Oleracea L.) utilizando cloridrato de L-cisteina para preservação das amostras
Os pesticidas etileno-bis-ditiocarbamatos da classe dos ditiocarbamatos estão entre os fungicidas mais empregados em todo o mundo para o controle de pragas. Muitos métodos para determinar ditiocarbamatos são baseados na hidrólise ácida em presença de cloreto estanoso e análise do CS2 gerado por diferentes técnicas. Nesse contexto, constituiram em obj
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/06/2010
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8. Síntese e caracterização de complexos N,N -dietilditiocarbamato de Bi(III), Sn(IV), Ga(III), In(III) e Zn(II) e de seus produtos de decomposição térmica.
The literature reports several interesting properties of dithiocarbamate ligands.Therefore, N,N-dietyldithiocarbamate anion has been employed in this work to produce Bi(III), Ga(III), In(III), Zn(II) and organotin complexes, in order to explore its ability as single source precursors of inorganic sulfides, in pyrolysis experiments. The work was divided into
Publicado em: 2009
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9. DESENVOLVIMENTO E VALIDAÇÃO DE MÉTODO PARA DETERMINAÇÃO DE ETILENOTIOURÉIA EM URINA EMPREGANDO HPLCUV / DEVELOPMENT AND VALIDATION METHOD FOR THE DETERMINATION OF ETHYLENETHIOUREA IN URINE BY HPLC-UV
In order to supply the world-wilde demand for food, it is essential to use the pesticides to protect the crops against pests and diseases. But the indiscriminate and injudicious use of these compounds have resulted in widespread contamination in food commodities and environment in all fields, increasing, this way, the preoccupation with chemical products use
Publicado em: 2008
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10. Effect of rinsing solutions in waste removal of mancozeb in tomatoes / Efeito de soluções de enxágüe na remoção de resíduos de mancozeb em tomates
Fungicides are the pesticides mostly used the tomato crop. Among the fungicides the dithiocarbamates are the mostly used. The objective of this work was to study the efficiency of the dithiocarbamate mancozeb removal from tomatoes through processes of washes. We performed analyses of acidity, brix, the activity of water (aw), pH and content of manganese for
Publicado em: 2008
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11. Ensaio de proficiência para análise de ditiocarbamatos em polpa de banana
A proficiency assay of the determination of dithiocarbamate pesticide residues in banana was carried out. Fourteen laboratories participated in this study. Homogeneity and stability testing were performed by INCQS on the samples sent to the laboratories. Analytical results supplied by the pesticide residues laboratory of the VWA/KvW, Amsterdam, Holland, were
Química Nova. Publicado em: 2007-02
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12. Avaliação de resíduos de etilenotiouréia (ETU) em frutas comercializadas na cidade de São Paulo / Evaluation of ethylene thiourea (ETU) in fruits traded in the city of São Paulo.
Ethylene thiourea (ETU) is a toxic substance generated by the degradation and/or biotransformation of ethylenebisdithiocarbamates (EBDC) fungicides. Their residues may be found in plants and in the environment after EBDC s use in agriculture or in animals and humans when exposed to such products. ETU is confirmedly able to induce tumors in rodents thyroids a
Publicado em: 2007