Liquid adsorption chromotography (LAC) on an analytical scale, as well as on a semi-preparative scale is used for the analysis of polypropylene glycols), (PPG), and its performance for the determination of molecular mass distributions was compared with that of size-exclusion chromatography (SEC). Semi-preparative LAC provides monodisperse standards of PPG up to a molecular mass of 1400, which are used to establish an accurate SEC calibration. The influence of preferential solvation in LAC is studied and a correction method using two universal detectors (density and refractive index) is presented.
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Trathnigg et al. (1995) studied this question.
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