Extraction and GLC Determination of Mixed Sulfonamides in Feeds

Abstract
Seven sulfonamides added to feed samples were extracted with DMF and hydrolyzed to the amines with sulfuric acid. After alkalization, the extracts were analyzed by GLC, using a Carbowax 20M column. Recoveries averaged between 94 and 104%. The described method is rapid and requires a minimum of manipulations.

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