6 documents found, page 1 of 1
Simultaneous determination of different classes of pesticides in breast milk by...
Palma,Danielly C. A.; Lourencetti,Carolina; Uecker,Marli E.; Mello,Paulo R. B.; Pignati,Wanderlei A.; Dores,Eliana F. G. C.This study presents the development, validation and application of a multiresidue analytical method intended to determine nine pesticides and a degradation product (α-endosulfan, β-endosulfan, α-HCH, g-HCH, aldrin, p,p'-DDE, p,p'-DDT, cypermethrin, deltamethrin, and trifluralin) in breast milk samples by solid-phase dispersion and gas chromatography with electron capture detector (GC/ECD). The proposed method i...
Simple method to determine residual cypermethrin and deltamethrin in bovine milk
Hernandes,Thais; Dores,Eliana F. G. C.; Ribeiro,Maria L.; Rossignoli,Paulo A.; Malm,OlafA simple, validated and economic method is described for the determination of deltamethrin and cypermethrin in bovine milk. It is based on simultaneous extraction and clean up on matrix solid-phase dispersion (MSPD) with Celite® using hexane/acetone (7:3 v/v), followed by gas chromatography with electron capture detector (GC-µECD) analysis. Confirmatory analysis was carried out by GC-mass spectrometry (MS). The...
Currently used pesticides in water matrices in Central-Western Brazil
Nogueira,Elisângela N.; Dores,Eliana F. G. C.; Pinto,Alício A.; Amorim,Ricardo S. S.; Ribeiro,Maria L.; Lourencetti,CarolinaThis study provides data on the presence of the pesticides atrazine, chlorpyrifos, α-endosulfan, β-endosulfan, flutriafol, malathion and metolachlor in water matrices in urban and rural areas of Campo Verde and Lucas do Rio Verde Cities, Mato Grosso State, Brazil. Surface, rain, and groundwater samples were collected in the rainy and dry seasons during 2007 and 2008 in these important grain-producing areas. The...
Environmental dynamics of pesticides in the drainage area of the São Lourenço R...
Casara,Karen P.; Vecchiato,Antonio B.; Lourencetti,Carolina; Pinto,Alicio A.; Dores,Eliana F. G. C.This study assessed the environmental dynamics of pesticides in the São Lourenço River headwaters, Mato Grosso State, Brazil. The pesticides atrazine, flutriafol, metolachlor, α- and β-endosulfan and the metabolites endosulfan sulfate, desethylatrazine and desisopropylatrazine were determined in water (rain, surface, ground and runoff) and in sediment (runoff and bottom) samples, collected from August 2009 to J...
Determination of pesticides multiresidues in shallow groundwater in a cotton-gr...
Leandro,Carbo; Souza,Valéria; Dores,Eliana F. G. C.; Ribeiro,Maria L.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 in water by HPLC/DAD. The method was validated and average recoveries ranged from 73 to 113%, with a relative standard deviation of 2 to 16%. Detection limits ranged from 0.06 to 0.57 µg L-1....
Multiresidue determination of herbicides in environmental waters from Primavera...
Dores,Eliana F. G. C.; Navickiene,Sandro; Cunha,Marcelo L. F.; Carbo,Leandro; Ribeiro,Maria Lúcia; De-Lamonica-Freire,Ermelinda M.A study on the presence of herbicides, namely simazine, metribuzin, metolachlor, trifluralin, atrazine and two metabolites, deisopropylatrazine (DIA) and deethylatrazine (DEA), was performed in ground and surface waters from Primavera do Leste region, Mato Grosso state (Middle West of Brazil). The analytical procedure was based on solid-phase extraction (SPE) with Sep-Pak C18 disposable cartridges and ethyl ace...