Pressurized capillary electrochromatographic assay of trimethoprim impurities using 1 microm particle-based columns.


One micrometre silica particles, derivatized with C18, were electrokinetically packed into a 75-microm-i.d. capillary. The resulting column was evaluated for the separation of trimethoprim (TMP) and its impurities using pressurized capillary electrochromatography (pCEC), starting from a capillary liquid chromatographic (CLC) separation. These samples… (More)


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