Summary
Ten pesticides have been completely separated by two-dimensional (2D) development on TLC plates coated with coupled layers of octadecyl silica (reversed-phase, RP) and plain silica (normal-phase, NP). The binary mobile phases, aqueous-organic for RP chromatography and nonaqueous for NP chromatography, were chosen from plots ofR F against mobile-phase composition and graphicalR F(RP)-R F(NP) correlations. The different selectivity of the RP and NP systems enabled dispersion of spots over the plate area and good separation.
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Tuzimski, T., Soczewinski, E. Use of a database of plots of pesticide retention (R F) against mobile-phase composition.Part I. Correlation of pesticide retention data in normal- and reversed-phase systems and their use to separate a mixture of ten pesticides by 2D TLC. Chromatographia 56, 219–223 (2002). https://doi.org/10.1007/BF02493215
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DOI: https://doi.org/10.1007/BF02493215