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capacity factor
Furthermore, this procedure for predicted performance achieves eminence in the estimation of the capacity factor.
      
The influence of temperature and composition of the eluent on the retention time, the retention volumes of the glycosides, the selectivity and the capacity factor of the column were studied.
      
Higher temperature and a higher ethanol content in the eluent reduce the retention time, the selectivity and the capacity factor but the efficiency of the column increases.
      
Operation characteristics of the microcolumns were evaluated by plate height versus linear velocity and plate height versus capacity factor plots.
      
It is shown that the concentration of an organic modifier not only affects the capacity factor, but also the selectivity of separation.
      
The logarithm of the capacity factor is assumed to vary linearly with the composition of isoeluotropic ternary mixtures formed by mixing the two limiting binaries.
      
In HPLC the capacity factor is determined by the activity coefficients in the stationary and mobile phases.
      
Knowing the free energy of mixing, the capacity factor can be computed.
      
The log k' values, where k' is the solute capacity factor, were found to be linear functions of the logarithm of the mole fraction of acetonitrile (Nb) in the respective mobile phases.
      
The logarithm of the capacity factor is derived as a sum of logarithms of the structural fragments.
      
The contribution of the molecule fragments to the capacity factor value is discussed.
      
Optimum packing conditions were determined and column performance was then critically evaluated in terms of the reduced plate height as a function of both reduced velocity and solute capacity factor.
      
The correlations between the logarithm of capacity factor (log k') and several descriptors, which show the molecular size, shape and physical property of a solute, were determined.
      
The correlations between the logarithm of the capacity factor and several descriptors indicating the molecular size, shape and the physical properties of a solute were determined.
      
The comparison is based on the variation of the phase ratio and the capacity factor, and includes column efficiency (HETP, theoretical plate number), resolution, retention time, and sample capacity.
      
Retention measurements were performed in the capacity factor, k', range 1-30 with organic solvent-water eluents using acetone, acetonitrile, ethanol, methanol, 1-propanol and 2-propanol.
      
A series of model substances with known solubility parameter were chromatographed and from the temperature dependence of the capacity factor, some of the thermodynamic parameters influencing solute retention were determined.
      
Resolution, column performance, extra-column variance, capacity factor, and column length are incorporated into these algorithms.
      
The use of large packing materials indicated that the capacity factor for a sample solute is almost constant under a given pump pressure regardless of the flow rate of the supercritical fluid.
      
The possibilities of influencing and adjusting the range in which the capacity factor is changed by the proper selection of column parameters are outlined and the observed changes in the retention index demonstrated.
      
 

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