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Liquid exclusion adsorption chromatography

Trathnigg, B., Kollroser, M., Rappel, C. (2001). Liquid exclusion adsorption chromatography, a new technique for isocratic separation of nonionic surfactants. III. Two-dimensional separation of fatty alcohol ethoxylates. J. Chromatogr. A 922(1-2), 193-205. [Pg.445]

Trathnigg B. Liquid exclusion—adsorption chromatography new technique for iso-cratic separation of nonionic surfactants, 11. Quantitation in the analysis of fatty alcohol ethoxylates. J Chromatogr A 2001 915 155. [Pg.122]

Modern liquid chromatography can be carried out in any of the classical modes, e.g., liquid-solid adsorption chromatography, liquid-liquid partition chromatography, reversed-phase chromatography, ion-exchange chromatography, and gel-permeation (size exclusion) chromatography. [Pg.258]

LSC is liquid-solid chromatography. Strictly speaking, any type that utilizes a solid stationary phase, namely, adsorption, ion exchange, and size exclusion, can be referred to as LSC. However, adsorption chromatography is the only one of this group that is routinely referred to as LSC. [Pg.532]

Although the overwhelming majority of theoretical papers in liquid chromatography are dealing with the various aspects of RP-HPLC separation, theoretical advances have also been achieved in some other separation modes. Thus, a theoretical study on the relation between the kinetic and equilibrium quantities in size-exclusion chromatography has been published, hi adsorption chromatography the probability of adsorbing an analyte molecule in the mobile phase exactly r-times is described by... [Pg.38]

The principle of the liquid chromatography under critical conditions (LC CC) was elucidated in Section 16.3.3. The mutual compensation of the exclusion—entropy and the interaction—enthalpy-based retention of macromolecules can be attained when applying in the controlled way the interactions that lead to either adsorption or enthalpic partition. The resulting methods are called LC at the critical adsorption point (LC CAP) or LC at the critical partition point (LC CPP), respectively. The term LC at the point of exclusion-adsorption transition (LC PEAT) was also proposed for the procedures employing compensation of exclusion and adsorption [161]. It is anticipated that also other kinds of enthalpic interactions, for example the ion interactions between column packing and macromolecules can be utilized for the exclusion-interaction compensation. [Pg.478]

Adsorption Chromatography 25-4 Liquid-Liquid Chromatography 25-5 Gel and Exclusion Chromatography 25-6 Thin-Layer and Paper Chromatography 25-7 Gas Chromatography 25-8 Identification and Measurement References Problems... [Pg.623]

Typical thin-layer separations are performed on a glass plate that is coated with a thin and adherent layer of finely divided particles this layer constitutes the stationary phase. The particles are similar to those described in the discussion of adsorption, normal- and reversed-phase partition, ion-exchange, and size-exclusion column chromatography. Mobile phases are also similar to those employed in high-performance liquid chromatography. [Pg.1001]

The first step in the characterization of polymers is to fractionate the unknown sample, and then to determine the stmctures of the separated fractions. Separation is best performed by modem liquid chromatographic methods. Depending on the kind of heterogeneity it is necessary to select the most suitable chromatographic method, i.e. either Size-Exclusion Chromatography (SEC) or Liquid Adsorption Chromatography (LAC). Furthermore, the meanwhile well-established Liquid Adsorption Chromatography at Critical Conditions (LACCC) is also used. A separation system that operates near critical conditions sometimes has to be applied. [Pg.406]


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