On the Importance of Purification of Sodium Polystyrene Sulfonate. (7th March 2012)

• Record Type: Journal Article
• Authors: Sen, Akhil K.; Roy, Sandip; Juvekar, Vinay A.
• Other Names: Kingshott P. Academic Editor.; Volny M. Academic Editor.
• Is Part Of: ISRN analytical chemistry. Volume 2012(2012)
• Publication Date: 2012-03-07
• Subjects: Chemistry, Analytic -- Periodicals; Chemistry, Analytic; Electronic journals; Periodicals; Electronic journals; 543
• DOI: 10.5402/2012/514509
• Languages: English
• ISSNs: 2090-7311

Abstract

Abstract : Ion exchange is commonly employed for purification of sodium polystyrene sulfonate (NaPSS), a molecule widely used as a model polyelectrolyte. However, the present work demonstrates that the ion exchange process itself may introduce some extraneous species into NaPSS samples by two possible mechanisms: (i) chemical transformation of polystyrene sulfonic acid (HPSS), a relatively unstable intermediate formed during ion exchange and (ii) release of small amount of "condensed" acid from cationic resins during the elution of NaPSS molecules. Based on these observations, it is proposed that simple dialysis is adopted as a standard protocol for the purification of primary NaPSS sample.