A METHOD OF PREPARING A LIQUID MIXTURE

摘要

A method of preparing a liquid mixture of controlled pH comprising (i) one or more buffering species, (ii) an acid or alternatively a base, (iii) optionally a salt; and (iv) a solvent wherein the proportions of the different components ((i) to (iv)) of the mixture are concomitantly varied in such a way as to take account of the interrelationship of the ionic strength and the pH of the mixture. The method is based on the use of the Debye-Hückel equation in an interative procedure. The invention also relates to a method of preparing a liquid flow and an apparatus used in such a method.