Plate Theory and Extensions - The Gaussian Form of the Elution Equation > Page 43

Thus, expanding (Xm(n)) as a series ,

   

                     

As (n) is large and the whole elution curve for any solute is virtually 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 so,  and all higher terms can be ignored.

         Therefore