Abstract
The HPTLC behavior of closely related N-phenylamide derivatives of phenoxyacetic acid has been studied on silica gel and diol-modified silica gel layers developed with binary non-aqueous mobile phases (ethyl acetate, dioxane, or methyl ethyl ketone in n-heptane or dichloromethane). The influence of the different polar modifiers on the retention was illustrated as linear plots of RM = f(log c). The separation selectivities of the investigated compounds on silica gel and diol phases were compared as RM(silica) vs. RM(diol) relationships.
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