Abstract
Thin-layer chromatographic-enzymatic identification of organophosphorus insecticides. Activation of weak esterase inhibitors. 1. R F values of 20 insecticide esterase inhibitors, determined in solvent systems consisting of benzene and acetone in various ratios, are presented. 2. Employment of different activation techniques considerably improves the detection sensitivity of the initially not, or only weakly, inhibiting thiono- or dithiophosphoric acid esters, as well as of the phosphonic acid ester trichlorphon. 3. For the thionophosphoric acid esters parathion, methylparathion and bromophos, oxidation with an aqueous bromine solution proved superior to the hitherto commonly used treatment with bromine vapour. 4. An increased detection sensitivity of dimethoate can only be achieved by means of ultraviolet irradiation. The other thionophosphoric acid esters can also be detected with high sensitivity in this way. 5. Treatment with ammonium hydroxide improves the detection sensitivity of trichlorphon, whereby it is converted into DDVP.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
