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The lipophilicity of some emerging pesticides is investigated by reversed-phase high performance thin-layer chromatography (RP-HPTLC) on RP-18, RP-8 and CN stationary phases. The mobile phases were mixtures of methanol-water in different proportions of volume. The lipophilicity indices taken in consideration during this study are: RM0, mean of RF and RM, b, φ0, scores corresponding to the first principal components of RM and RF. The obtained results are compared with the computed lipophilicity indices (Log P) in order to evaluate the suitability of the involved method in the lipophilicity estimation for the pesticides. The comparison is performed through correlation matrices and profiles. The obtained correlations are indicating a high statistical significance.

Keywords: Pesticides, Lipophilicity, Log P, PCA