Plate Theory and Extensions - Temperature Changes During the Passage of a Solute Through a Theoretical Plate in Gas Chromatography > Page 86

Now, .

In addition, (n) is large and the whole elution curve of a given solute is practically contained between w = - and w =  (i.e., contained within four standard deviations of the Gaussian curve) thus  will always be very much greater than  and, thus,  and all higher terms can be ignored with respect to .

Thus, and substituting for in equation (73),

    

Thus, integrating from (-) to the point of measurement (w),

Now, as (n) is large when v=0, w=-n and q = 0 Thus, E=0, and