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