Qualitative enzymatic detection of organophosphate and carbamate insecticides

J Environ Sci Health B. 2020;55(11):951-958. doi: 10.1080/03601234.2020.1797425. Epub 2020 Jul 22.

Abstract

In this study, new polymers containing amides (TrisPS-Ntaa, and TrisPS-Ntaa-Fc) were synthesized by condensation reaction for qualitative identification of insecticides. The synthesized polymers, including amides were investigated by infrared spectroscopy (IR), scanning electron microscopy-energy dispersion X- ray spectrometry (SEM-EDX), and gel permeation chromatography (GPC). Then, acetylcholinesterase enzyme (AChE) was covalently immobilized on these polymers to improve properties (including activity, reusability, and storage stability). Accordingly, organophosphate (malathion, acephate, chlorpyrifos methyl) and carbamate (carbofuran, methiocarb, methomyl), which are used to prevent harmful organisms in some agricultural products were enzymatically determined based on their inhibitory activity on AChE.

Keywords: carbamate; organophosphate; Acetylcholinesterase; polymers containing azomethine; tris(2-aminoethyl)amine polymer-bound.

MeSH terms

  • Acetylcholinesterase / chemistry
  • Acetylcholinesterase / metabolism
  • Amides / chemistry
  • Carbamates / analysis*
  • Carbofuran / analysis
  • Chlorpyrifos / analogs & derivatives
  • Chlorpyrifos / analysis
  • Cholinesterase Inhibitors / analysis
  • Cholinesterase Inhibitors / pharmacology
  • Enzymes, Immobilized / chemistry
  • Enzymes, Immobilized / metabolism
  • Insecticides / analysis*
  • Insecticides / pharmacology
  • Malathion / analysis
  • Methomyl / analysis
  • Organophosphates / analysis*
  • Organothiophosphorus Compounds / analysis
  • Phosphoramides
  • Polymers / chemistry*
  • Spectrometry, X-Ray Emission
  • Spectrophotometry, Infrared

Substances

  • Amides
  • Carbamates
  • Cholinesterase Inhibitors
  • Enzymes, Immobilized
  • Insecticides
  • Organophosphates
  • Organothiophosphorus Compounds
  • Phosphoramides
  • Polymers
  • Methomyl
  • acephate
  • Acetylcholinesterase
  • Chlorpyrifos
  • chlorpyrifos-methyl
  • Carbofuran
  • Malathion