Characterization of quaternary ammonium oligomers by paired-ion reversed-phase liquid chromatography-mass spectrometry.


The separation of novel permanently charged oligomers was studied using paired-ion reversed-phase liquid chromatography. The polyionene studied is less than 5 kDa in size, but contains three oligomer series with different end-group chemistries. The complexity of this polyionene makes development of a single-dimension separation quite challenging. Separation… (More)