Abstract
Eighteen pesticides have been separated by two-dimensional thin-layer chromatography on a moderate polarity CN-modified silica gel. CN-silica is widely used as a adsorbent in both normal- and reversed-phase chromatography. Large selectivity differences are obtained by combination of both NP and RP modes on cyanopropyl-bonded polar adsorbents. The greatest spread of points was obtained by combining nonaqueous normal-phase mobile phases (tetrahydrofuran or ethyl acetate in n -heptane) and aqueous reversed phases (a polar solvent (methanol or acetonitrile) in water), both on thin layers of cyanopropyl-bonded polar adsorbent. Correlations of R F values in NP and RP systems were used for practical separation of a mixture of eighteen pesticides by 2D TLC on this adsorbent. Plates were scanned and videoscanned to show the real pictures of the 2D TLC separation.
Published Version
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.
