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Simple determination of dichlorvos in cases of fatal intoxication by gas Chromatography-Mass spectrometry.
J Chromatogr B Analyt Technol Biomed Life Sci
January 2023
Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia.
Dichlorvos (DDVP) is an organophosphorous insecticide which is classified as "highly hazardous" Class 1B chemical by World Health Organization (WHO) and largely misused for the purpose of self-poisoning in developing countries. Forensic toxicology laboratories are routinely encountering cases of pesticide poisoning due to their fatal intoxication. Herein; a method is described based on vortex-assisted dispersive liquid-liquid microextraction (VA-DLLME) coupled with Gas Chromatography-Mass Spectrometry (GC-MS) for the determination of an organophosphorous insecticide; dichlorvos (DDVP) in human autopsy samples (blood, stomach content and liver).
View Article and Find Full Text PDFNanostructured polyaniline SPME fiber coating for chemical warfare agents analysis.
Anal Chim Acta
April 2022
Institute of Chemistry, Military University of Technology, Kaliskiego 2, 00-908, Warsaw, Poland. Electronic address:
Nanostructured polyaniline (PANI) was electrochemically obtained as a fiber coating of solid-phase microextraction (SPME) and then used in the analysis of selected organoarsenic and organophosphorus compounds in soil samples. Also, comparative studies of the obtained PANI fibers with seven commercially available fibers for varying miscellaneous polarity, and various absorption and/or adsorption natures, were carried out. Quantitative analysis of environmental samples was performed using a gas chromatograph coupled with a tandem mass spectrometer.
View Article and Find Full Text PDFCountercurrent Salting-out Homogenous Liquid-Liquid Extraction and Dispersive Liquid-Liquid Microextraction Based on the Solidification of Floating Organic Drop Followed by High-Performance Liquid Chromatography for the Isolation and Preconcentration of Pesticides from Fruit Samples.
J AOAC Int
April 2022
Research Center for Environmental Determinants of health (RCEDH), Research Institute for Health, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Background: Pesticides are widely used to control pests and prevent diseases in crops, including cereals, vegetables, and fruits. Due to factors such as the persistence of pesticides, bioaccumulation, and potential toxicity, pesticide residue monitoring in foodstuffs is very important.
Objective: In the current research, we proposed a novel approach using countercurrent salting-out homogenous liquid-liquid extraction combined with dispersive liquid-liquid microextraction based on the solidification of floating organic droplets (DLLME-SFO) for isolation and preconcentration of pesticides from aqueous samples for analysis by high-performance liquid chromatography-ultraviolet detection (HPLC-UV).
Combination of dispersive solid phase extraction with solidification organic drop-dispersive liquid-liquid microextraction based on deep eutectic solvent for extraction of organophosphorous pesticides from edible oil samples.
J Chromatogr A
September 2020
Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address:
A dispersive solid phase extraction method was combined with deep eutectic solvent-based solidification of floating organic drop-dispersive liquid-liquid microextraction and used for the extraction/preconcentration of some organophosphorus pesticides residues from edible oil samples. The extracted analytes were quantified with gas chromatography-nitrogen phosphorous detector. In this procedure, the sample lipids are saponified with a sodium hydroxide solution and then the analytes are adsorbed onto a primary secondary amine sorbent.
View Article and Find Full Text PDFSolid-phase microextraction of organophosphorous pesticides from food samples with a nitrogen-doped porous carbon derived from g-CN templated MOF as the fiber coating.
J Hazard Mater
February 2020
Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China. Electronic address:
A nitrogen-doped metal organic framework (MOF) based porous carbon (C-(CN@MOF)) was produced by the carbonization of a graphitic carbon nitride (g-CN) templated MOF (NH-MIL-125). The C-(CN@MOF) was then coated on a stainless steel wire by sol-gel technique to serve as a solid-phase microextraction (SPME) fiber coating. The coated fiber was studied for the extraction of fourteen organophosphorous pesticides (OPPs) from different fruit and vegetable samples followed by gas chromatography-mass spectrometer (GC-MS) detection.
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