Previous experiments to separate the amylase and "invertase" of honey by 
chromatography on sephadex-gels were unsuccesful. It was shown that 
honey-amylase, -like amylases form other sources -- has hydrophobic properties. 
Therefore it was possible to separate amylase-activity from other activities by 
means of hydrophobic affinity chromatography on phenyl-butylamine-Sepharose 4B.