Colloidal gas aphrons generated from the anionic surfactant AOT for the separation of proteins from aqueous solution

Colloidal gas aphrons are microbubbles 10-100 mu m in diameter created by i ntense stirring of a surfactant solution. They are composed of a gaseous in ner core surrounded by a surfactant film. They have a high surface area, ar e relatively stable and have the ability to interact with proteins through electrostatic interactions. These characteristics make colloidal gas aphron s ideally suited for use as a downstream processing technique. In this stud y the effect of different process parameters on the recovery of three prote ins (conalbumin, ribonuclease A and ol-chymotrypsinogen A) was studied for a protein-ACT (sodium bis-(2 ethylhexyl) sulfosuccinate) system. High enric hment ratios (up to 8) and high recovery of the protein (85%) are found und er optimum conditions. (C) 1999 Society of Chemical Industry.