Journal of Chromatography A 1991-01-01

Insight into the stability of PDADMAC and polybrene poly cationic coatings in capillary electrophoresis

Lei Pei, Charles A. Lucy

Index: J. Chromatogr. A. 1365 , 226-33, (2014)

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Abstract

• Higher molecular weight polycations forms more stable coatings. • Adsorbed polycation coatings are less stable at high pH. • Instability was caused by surface catalyzed alkaline conversion of quaternary amines. • Successive multiple ionic layer coatings show greater alkaline stability by distancing the polycation from the surface.