Applications

The strong functional group is effective as a conventional ion exchange resin or scavenger. The relatively small pore size is optimal for small molecules and the resin will exclude large molecules like proteins or other large molecular complexes. 

Typical uses for strong anion exchangers are for binding to opposite charged ionic species in various types of solutions including pharmaceutical mixtures or biological extracts or plant-based extracts. 

SAX resins can bind and scavenge out the following compound types

• Phenolics
• Organic acids, phosphates
• Inorganic anions
• Biological molecules with acidic groups

One recent example of ours is on the reduction of undesired polyphenolic compounds in industrial potato fruit juice. Interestingly, the best performing resin was SAX002, even though other SAX resins in the collection with similar or higher capacity and with the same styrenic backbone were tested. Hence, resin architecture is an overlooked and important factor in separation science, but must be determined by experimental tests for each matrix. Ie, every complex solution may need to be screened with a library of promising resins to determine the best performing candidate for a given separation challenge.