Using gas chromatography—electron capture detector protocol, pesticide residue levels on four common vegetables (cabbage, carrot, lettuce, and tomatoes) consumed in Ho Municipal, Ghana, were investigated. A total of 5 kg each the randomly sampled triplicate from three different markets. Organochlorine pesticides, including residues γ-HCH, δ-HCH, heptachlor, aldrin, p, p’-DDT, o, p’-DDT p’-DDE d...

Polybrominated organic compounds are ubiquitous throughout the environment. This generic term comprises several classes of brominated flame retardants (e.g., polybrominated diphenyl ethers, polybrominated biphenyls, hexabromocyclododecane, dibromopropyltribromophenyl ether, 1,2-bis(2,4,6-tribromophenoxy)ethane) as well as a range of marine halogenated natural products (HNPs). Here we present ga...

The decontamination reactions of O,S-diethyl methyl phosphonothiolate, as an agricultural organophosphorous pesticide onto 20 wt% loaded manganese dioxide nanoparticles-silver-Y zeolite as a nanocomposite catalyst in different solvents, were evaluated and monitored by means of gas chromatography–flame ionization detector and gas chromatography–mass spectrometry. Prior to the reaction, the catal...

liver samples from golden jackal (canis aureus) were collected from noor in the central coastline mazandaran province. the samples of this study were killed in road accidents. levels of persistent organochlorine pollutants (pops) including polychlorinated biphenyls (pcbs), ddts and metabolites, hexachlorocyclohexanes (hchs) and metabolites, hexachlorobenzene (hcb), aldrin and dieldrin were meas...

Frequency-pulse-modulated electron capture gas-liquid chromatography was used in conjunction with appropriate derivatization procedures to obtain chromatograms from extracts of pleural effusions. These chromatograms were used to rapidly classify the various types of pleural effusions. With this method we have been able to distinguish among a limited number of effusions caused by congestive hear...

Sodium dodecyl sulfate (SDS) was introduced as an esterase inhibitor in the determination of two extremely labile, ultrashort-acting beta-blockers-esmolol and flumolol--in whole blood. SDS was much more efficient than previously used agents in preventing hydrolysis. The assay comprises solvent extraction, perfluoroacylation, and capillary gas-chromatography with electron-capture detection. The ...

Supercritical fluid extraction and quantification of chlorpyrifos insecticides in fresh vegetables by Gas Chromatography with Electron Capture Detection (GC-ECD) 1Mohammad Arifur Rahman*, 2Dzolkhifli Omar, 3Md Zaidul Islam, 2M.M.Morshed and 3K.N.H bin Rashid Toxicology lab., Horticulture Research Centre (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh. Departme...