A polar-copolymerized method to prepare silica-based anion exchanger for ion chromatography

Strong cation exchange column allow for symmetrical peak shape and increased sample loading in the separation of basic compounds

“…The slopes of the hyoscyamine, propranolol, scopolamine and amitriptyline plots are −0.9198, −0.8843, −0.9148 and −0.8573, respectively. These slopes are close in value to the theoretical slope of −1.0 for the cationexchange elution of a singly charged cation [30].…”

A reversed-phase/hydrophilic interaction mixed-mode C18-Diol stationary phase for multiple applications

“…The enhanced attention was paid on the preparation of RPLC/HILIC MMC packing to expand the applications of this kind of stationary phase, e.g. "click β-cyclodextrin" stationary phase [15], imidazoline polymerized silica (SiO 2 ) [6], polymethacrylate with sulfobetaine groups immobilized capillary column [16], humic acid bonded aminopropyl SiO 2 [17], poly(acrylic acid-co-butyl acrylate) grafted SiO 2 [18], M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 poly-L-Lysine modified SiO 2 [8], peptide Boc-Phe-Aib-Phe-OH immobilized SiO 2 [9], etc.. Liang's group developed the "polar-copolymerized" approach for preparation of polar-modified RPLC stationary phases with various embedded polar or ion groups [19][20][21][22]. Moreover, a commercialized RPLC/HILIC MMC stationary phase was available as Acclaim Mixed-Mode HILIC-1 LC column [10].…”

Comparative Study of Duolite A-378 and Duolite A-143 Anion Exchange Resins by Application of <SUP>131</SUP>I and <SUP>82</SUP> Br as a Tracer Isotopes

“…The final activity (A f ) of the solution was also measured after 3h wh ich was sufficient time to attain the equilibriu m [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The activ ity measured at various time intervals was corrected for background counts.…”

“…Preliminary studies show that the above exchange reactions are of first order [27,28]. Therefore logarith m of activity when plotted against time gives a co mposite curve in which the activity initially decreases sharply and thereafter very slowly giving nearly straight line (Figure 1), evidently rapid and slow ion-isotopic exchange reactions were occurring simu ltaneously [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Now the straight line was extrapolated back to zero time.…”