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Abstract
The theoretical basis of choice of optimal composition of the binary mixed stationary phase for a given separation problem is described; a number of practical applications is presented. The possibility of the application of binary solvent systems in gas chromatography is considered for the investigation of the energy effect due to deviations from ideality of binary liquid mixtures. In the experimental part a method of calculation of excess free enthalpies of mixing solvents g E ( m) is given, together with an experimental illustration. The values of g E ( m) have been calculated from the deviations from linearity of the relationship log Xk ′ = mixed phase). The values of partition numbers ( k′) determined from retention times have been used for the calculation of partition coefficients ( K) of solutes at column temperature. The results obtained are compared with partition coefficients calculated from other retention data.
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