Sulfonic acids, detection paper chromatography

For the separation of aliphatic and aromatic acids, especially from substances of nonionic character, paper electrophoresis can be applied successfully. With a potential drop of lOV/cm and with 2n ammonia or 1 N acetic acid as a buffer, the separation can be carried out in 2 hr. Mono-, di-, and polysulfonated derivatives are also separated, but not isomeric sulfonic acids. Detection is carried out as in paper chromatography. 

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