Applications of the pure SPP, SA and SB scales

The SPP general solvent seale, and the SA and SB speeifie solvent scales, are orthogonal to one another, as can be inferred from the small correlation eoefficients obtained in mutual fittings involving the 200 solvents listed in Table 10.3.1 [r (SPPvs. SA) = 0.13, r (SPP vs. SB) = 0.10 and r (SA vs. SB) = 0.01]. These results support the use of these seales for the multi-parameter analysis of other solvent scales or data sets sensitive to the solvent effeet on the basis of the following equation  

Eaeh of these seales (SPP, SB and SA) has previously been compared with other reported solvent seales and found to be pure seales for the respective effects. However, eq. [ 10.3.15] is used below to perform a multi-parameter analysis of various reported scales and experimental data sets of interest. 

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