Search
Now showing items 1-10 of 11
On-line extraction and determination of carbofuran in raw milk by direct HPLC injection on an ISRP column
(Vieweg, 1998-01-01)
A method has been developed for extraction and determination of carbofuran in milk. The method involved direct injection of raw milk on to a human serum albumin dimethyloctyl-silica gel (HSA-Cs) column and the use of 80:20 ...
Antagonism produced by hypertonic nutrient solutions on the depressive effect of carbofuran on isolated guinea pig atria
(Academic Press Ltd, 1996-04-01)
The action of hyperosmotic nutrient solutions on the depressive effects of carbofuran was studied on spontaneously contracting guinea pig atria. The force and frequency of contraction were recorded using an isotonic lever. ...
Determination of carbofuran and 3-hydroxycarbofuran residues in coconut water by solid-phase extraction and liquid chromatography with UV detection
(Taylor & Francis Inc, 2006-01-01)
A simple method was developed to determine carbofuran and 3-hydroxycarbofuran in coconut water. The procedure involved solid-phase extraction using C-18 cartridges with acetonitrile for elution. The analysis of these ...
Determination of carbamate residues in crop samples by cholinesterase-based biosensors and chromatographic techniques
(Elsevier B.V., 1998-04-24)
An amperometric biosensor based on cholinesterase (ChE) has been used for the determination of selected carbamate insecticides in vegetable samples. The linear range of the biosensor for the N-methylcarbamates (aldicarb, ...
Detection of carbamate pesticides in vegetable samples using cholinesterase-based biosensors
(Wiley-Blackwell, 1997-10-01)
Biosensors for determination of carbamates in vegetables based on five different cholinesterases as biorecognition elements and a screen-printed electrode system as an amperometric transducer were developed. Measurements ...
Comparison of different clean-up procedures for the determination of N-methylcarbamate insecticides in vegetable matrices by high-performance liquid chromatography with UV detection
(Elsevier B.V., 1998-01-30)
Several clean-up procedures which included the use of glass chromatography columns (silica gel, alumina, Florisil, silanized Celite-charcoal), Sep-Pak cartridges and standard solutions were compared for the determination ...
Seletividade de herbicidas aplicados em pré-emergência na cultura de cana-de-açúcar tratada com nematicidas
(Sociedade Brasileira da Ciência das Plantas Daninhas, 2004-12-01)
O objetivo do trabalho foi estudar a seletividade de herbicidas para a cultura da cana-de-açúcar quando aplicado em culturas tratadas com nematicidas. O experimento foi instalado em área pertencente à Usina São José, ...
Desempenho de sementes de algodão tratadas quimicamente e armazenadas
(Associação Brasileira de Tecnologia de Sementes (ABRATES), 2002-01-01)
Considerando que o armazenamento desempenha papel decisivo na manutenção da qualidade da semente, desenvolveu-se este trabalho com o objetivo de avaliar a qualidade fisiológica e fitossanitária de sementes de algodão, ...
Uso de extratos vegetais, manipueira e nematicida no controle do nematoide das galhas em cenoura
(Grupo Paulista de Fitopatologia, 2012-03-01)
Extratos aquosos de várias espécies vegetais têm se mostrado promissores no controle alternativo do nematoide de galhas Meloidogyne incognita (Kofoid & White), um dos agentes mais limitantes para o cultivo da cenoura. O ...
Determination of pesticides multiresidues in shallow groundwater in a cotton-growing region of Mato Grosso, Brazil
(Soc Brasileira Quimica, 2008-01-01)
Aiming to evaluate the contamination of groundwater by pesticides in cotton growing areas, an SPE-based method (styrene-divinylbenzene copolymer - SDVB) was developed for the simultaneous determination of twelve pesticides ...