Results 181 to 190 of about 11,031 (219)

Pesticide Residues Determination in Vegetables from Romania by GC-ECD

2009
Pesticide use raises a number of environmental concerns. Over 98% of sprayed insecticides and 95% of herbicides reach a destination other than their target species, including non-target species, air, water, bottom sediments and food. Pesticide drift occurs when pesticides suspended in the air as particles are carried by wind to other areas, potentially
Alina Soceanu, Simona Dobrinas, Valentina Coatu, Elisabeta Chirila   +3 more
openaire   +1 more source

Incidence of Deoxynivalenol in Wheat Flour in Argentina and GC–ECD Method Validation

Journal of AOAC International, 2019
Background: 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, Marcela, Villarreal, Tomás M López, Seal, Mariano E, Simón, Camila S Santana, Smersu, Estela A, Kneeteman   +5 more
openaire   +2 more sources

Determination of Organochlorine Pesticide Residues in Sesame Seeds by GC-ECD

Chromatographia, 2009
A 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, Dong-Fei Zhang, Su-Fang Wang, Yu-An Sun, Xiao-Li Sun   +4 more
openaire   +1 more source

GC-ECD Determination of Lindane and Its Impurity α-HCH in Pharmaceutical Products

Chromatographia, 2010
A method was developed to determine lindane (γ-HCH), the widely used organochlorine pesticide, and its impurity α-HCH in bulk and pharmaceutical products (shampoo, gel and emulsion). The system was able to successfully resolve the lindane peak from α-HCH and interfering components. The method displays an excellent linearity over the concentration range
Vujić, Zorica, Matić, Silvana, Kuntić, Vesna, Vladimirov, Sote, Uskoković-Marković, Snežana   +4 more
openaire   +3 more sources

Study of organohalogen contaminants in yogurt by NAA and GC-ECD

Journal of Radioanalytical and Nuclear Chemistry, 2007
The 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, Z. F. Chai, H. B. Sun, J. L. Zhang, H. Ouyang, L. Xin, Y. D. Chuai   +6 more
openaire   +1 more source

Determination of haloacetic acids in water by acidic methanol esterification–GC–ECD method

Water Research, 2002
Acidic methanol esterification followed by gas chromatography (GC) with electron capture detection (ECD) was applied for the determination of the nine haloacetic acids in water. The main advantage of this method is the use of acidic methanol as the derivatization agent instead of the hazardous diazomethane.
Anastasia D, Nikolaou, Spyros K, Golfinopoulos, Maria N, Kostopoulou, Themistokles D, Lekkas   +3 more
openaire   +2 more sources

[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, 2011
To 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, Xia-li, Zou, Yuan-qian, Li, Hong-yan, Zeng, Yan, Li   +4 more
openaire   +1 more source

Headspace single-drop microextraction and GC–ECD determination of chlorpyrifos-ethyl in rat liver

Analytical and Bioanalytical Chemistry, 2008
The present work describes a headspace single-drop microextraction (HS-SDME) method in conjunction with gas chromatography electron capture detection (GC-ECD) for the determination of an organophosphate insecticide, chlorpyrifos-ethyl (CPF), in rat liver.
Bartosz, Wielgomas, Wojciech, Czarnowski
openaire   +2 more sources

Residue Analysis of Fluroxypyr-meptyl in Wheat and Soil by GC–ECD

Chromatographia, 2011
A 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, Ya-Qin Hu, Zi-Han Zhen, Zhu-Bo Deng   +3 more
openaire   +1 more source

Removal of sulfur interfering in the analysis of organochlorines by GC-ECD

The Analyst, 1999
Elemental sulfur is frequently formed by microbial activities in terrestrial and aquatic systems under anoxic conditions. This is indicated with high sensitivity by the electron capture detector (ECD) and can render determining higher boiling organochlorines by gas chromatography using an ECD impossible. Three methods for removing sulfur were compared:
V. Riis, W. Babel
openaire   +1 more source