Correlation of Retention Parameters of Pesti- cides in Normal and RP Systems and their Utilization for the Separation of a Mixture of Ten Urea Herbicides and Fungicides by Two-Dimensional TLC on Cyanopropyl- Bonded Polar Stationary Phase and Two-Adsorbent-Layer Multi-K Plate

摘要: Ten urea herbicides and fungicides have been separated by use of two-dimensional thin-layer chromatography. The largest differences are obtained combination normal-phase (NP) system reversed-phase (RP) on cyanopropyl-bonded polar adsorbents two – adsorbent layer containing a narrow zone octadecyl silica adjacent wide (or vice versa). greatest spread points was for nonaqueous NP phases with ethyl acetate RP comprising solvent (methanol) in water wettable (RP-18W). A good also pairs systems heptane-ethyl mobile water-dioxane phases, both thin layers adsorbents. correlations R F values NP/RP were utilized practical separation mixture ten pesticides using 2D-TLC these plates scanned videoscanned showing the real pictures TLC chromatograms.