Welch Ultisil ® ion exchange columns are available for both Strong Anion Exchange (SAX) and Strong Cation Exchange (SCX) columns. The SCX/SAX columns are silica based with high resolution and high efficiency. Ultisil® SAX is a polar bonded phase, consisting of an ammonium-functionalized silane, while Ultisil® SCX is a classical strong cation exchange, consisting of a covalently bonded aromatic sulfonic acid moiety.
