Binary Langmuir Isotherms

In a binary system, a nonlinear regression to these last five equations can be performed using the values of Vj determined by measuring the retention volumes of breakthrough curves in frontal analysis experiments. This method affords the determination of the parameters of the binary Langmuir isotherms fl/ and fej of the two components of the mixture. Jacobson and Frenz [108] have used this approach to develop two new methods. 

In the MMC method, a non-linear regression of the values of the mezzanine concentrations measured during the FA experiments is made to Eqs. 4.80 to 4.86. This regression gives estimates of the parameters of the binary Langmuir isotherm, Sj and bi, for each component of the mixture. 

Using this method, Jacobson et al. [14] showed that the competitive isotherms of pairs of simple solutes, like phenol and p-cresol, on alkyl-bonded silica stationary phases can be well fitted with a binary Langmuir isotherm. 

Single component isotherm of T and P were measmed using the ECP method and fitted to single component Langmuir isotherms in order to determine the column saturation capacity of each solute, qs,T arid qg,p. The binary Langmuir isotherms were written as ... 

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