Relation between chromatographic and thermodynamic characteristics of hydrocarbons

Retention index system, adsorption characteristics, and structure correlations of polycyclic aromatic hydrocarbons in fuels

“…The only exception is the well known relationship between retention and the boiling point and molecular refraction. The relation of retention on evaporation characteristics [45] and on free energy of formation has been reported earlier for hydrocarbons [59]. On the Carbopack surface a linear correlation ( R = 0.9882) has been found between the calculated heat of formation [57] and the Henry's adsorption constants (Figure 4).…”

Chromatography

“…A theoretical study has been made of the coupled transfer of two independent components in a fixed bed with instantaneous equilibrium (1443)• Peak heights can be estimated from the volume of the sample and the molecular weight of a compound in a homologous series (1366). The dependence of the partition coefficient and the retention volume on the molar refraction of the stationary phase has been established when stationary phases are substances of one homologous series (1274)• The separation speed of chromatographic columns has been studied (1171). High separation speeds are achieved on short columns with high permeability and with high inlet pressures.…”