THIN-LAYER CHROMATOGRAPHIC STUDY OF THE LIPOPHILICITY OF TRIAZINE HERBICIDES - INFLUENCE OF DIFFERENT ORGANIC MODIFIERS

The R(M) values of a series of triazine herbicides were measured using a reversed-phase TLC system with acetone, methanol or acetonitrile as the organic modifier of the mobile phase. The overlapping of the extrapolated R(M) values from three different systems shows that they are not dependent on the nature of the organic solvent. However, a more interesting point arises from a comparison of the b values of the TLC equations. The slopes of the straight lines describing the relationship between R(M) values and composition of the mobile phase are related to the solvent strength of the solvents.