Results 171 to 180 of about 384,770 (213)
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Study of organohalogen contaminants in yogurt by NAA and GC-ECD
Journal of Radioanalytical and Nuclear Chemistry, 2007The concentrations and distributions of total halogen (TX), extractable organohalogen (EOX) and extractable persistent organohalogen (EPOX) were determined in 20 kinds of yogurt specimens collected from Chinese supermarkets using neutron activation analysis (NAA) and gas chromatography equipped with a 63Ni electron capture detector (GC-ECD).
H. Zhang +6 more
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Sensitive GC/ECD analysis of selected PAHa by bromination
Toxicological & Environmental Chemistry, 1991A method for determination PAH's using GC‐ECD after derivatisation with bromine is presented. ECD is highly selective and sensitive for measuring bromo‐PAH's. The detection limits were improved up to two to three orders of magnitude compared with FID‐detection of underivatised PAH's.
M. Seym, H. Parlar
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Incidence of Deoxynivalenol in Wheat Flour in Argentina and GC–ECD Method Validation
Journal of AOAC International, 2019Background: Deoxynivalenol (DON) is a mycotoxin produced mainly by Fusarium graminearum. This fungus is the main plant pathogen associated with Fusarium Head Blight (FHB) wheat disease, causing significant economic losses and exposing human population to severe health risks. DON production changes widely among different years and areas and its effects
Mercedes, Cirio +5 more
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Validation of a novel derivatization method for GC–ECD determination of acrylamide in food
Analytical and Bioanalytical Chemistry, 2013This paper proposes a new method for quantitative analysis of acrylamide in cereal-based foods and potato chips. The method uses reaction with trifluoroacetic anhydride, and analyses the resulting derivative by use of gas chromatography with electron-capture detection (GC-ECD).
NOTARDONATO, Ivan +4 more
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New Procedure for the Determination of 3-Nitrotyrosine in Plasma by GC–ECD
Chromatographia, 2009A method suitable for the determination of 3-nitrotyrosine, a well known marker of nitro-oxidative stress, in plasma by GC–ECD has been investigated. After deproteinisation, SPE and LC separation, 3-nitrotyrosine was derivatised by a single-step procedure to the corresponding N-heptafluorobutyryl heptafluorobutyl ester and analysed.
R. Pavlovic +3 more
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Analysis of PCBs in Biotic Matrices by Two-Dimensional GC-ECD
International Journal of Environmental Analytical Chemistry, 1995The suitability of three GC-ECD systems for the separation of a model mixture containing various congeners of PCBs together with persistent chlorinated aromatics (pesticides and their metabolites, industrial chemicals) was tested. Analyses were performed on two parallel capillaries, the stationary phase of one of them was always in routine practice ...
J. Hajšlová +3 more
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Residue Analysis of Fluroxypyr-meptyl in Wheat and Soil by GC–ECD
Chromatographia, 2011A simple and reliable analytical method for fluroxypyr-meptyl residues in wheat and soil was established. The residual levels and dissipation rates of this pesticide in wheat and soil were determined by gas chromatography with electron capture detector (GC–ECD). Samples of wheat grains and soil were extracted with methanol–water, and then liquid–liquid
Ji-Ye Hu +3 more
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Determination of Organochlorine Pesticide Residues in Sesame Seeds by GC-ECD
Chromatographia, 2009A method for the multiresidue analysis of 12 organochlorine pesticides in sesame seeds has been developed. The organochlorine residues in the seeds were first extracted by accelerated solvent extraction and the extract subjected to gel permeation chromatography to remove larger molecular weight materials such as proteins and waxes. The purified extract
Guo-Qing Wang +4 more
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[Determination of dimethyl sulphate in environmental samples with GC-ECD].
Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition, 2011To develop an gas chromatography-electrophoretic capture detection (GC-ECD)method for determining dimethyl sulphate (DMS) in environmental samples.The environmental samples were dissolved with acetone and the DMS was reacted with KI. The reaction product of methyl iodide was extracted with Hexane and determined by GC-ECD, with HP-5 (30.0 m x 0.32 mm x ...
Xuan-fu, Qin +4 more
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Cyanide Distribution in Human Tissue, Determined by GC/ECD/HS
Analytical Letters, 2005Abstract Cyanide is an important acute poison in forensic sciences. Cyanide determination is in general performed in a blood sample.
Chunshui Zhang +4 more
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