Effect of solute ionization on chromatographic retention on porous polystyrene copolymers

Optimization of secondary chemical equilibria in liquid chromatography: theory and verification

“…Specific examples of equilibrants are given in Table I. The SCE-LC retention model has been experimentally verified for n = 1 and n = 2 previously by other workers (2,5 ) and is also verified later in this report for n = 1. An equation obtained by using retention times instead of capacity factors has also been verified (3).…”

“…Thus SCE-LC is a very powerful complement to conventional LC, and it is no surprise that SCE-LC has received considerable attention in the past (1)(2)(3)(4)(5)(6)(7)(8)(9).…”

Systematic purification of polydatin, resveratrol and anthraglycoside B from Polygonum cuspidatum Sieb. et Zucc.

“…As Horváth et al, Pietrzyk et al and other investigators [16][17][18][19][20] have demonstrated, the chromatographic behavior of the solutes are basically controlled by two major effects, a hydrophobic effect and a reversible ionization of the solute in the mobile phase. The behavior of iongenic solutes in the columns of non-polar stationary phases is controlled by two main events, the dissociation of the solutes in the mobile phase and the interaction between the solutes species and the stationary phase [20].…”

Determination of equilibrium constants from chromatographic and electrophoretic measurements

“…In chromatography, an effect of fast equilibria can be treated using a concept of limiting retention factors that has been used in reversed phase [17][18][19][20][21][22] as well as in ion-exchange [23] separation modes. Let's assume, for example, that fast equilibrium according to Eq.…”