Patent ID: 8475639

Claim:
A titration apparatus comprising: (a) a titration reservoir for a non-flowing sample solution to be titrated, (b) an ion source reservoir comprising an ion source solution of selected ions, positive or negative, (c) an ion exchange membrane barrier capable of passing ions of one charge, positive or negative, from said ion source solution to said titration reservoir, but of blocking essentially all bulk liquid flow, (d) a first electrode in electrical communication with said ion source reservoir, and (e) a second electrode in electrical communication with said titration reservoir, said first and second electrodes being inert when a current is applied between said first and second electrodes, said second electrode being in contact with said ion exchange barrier, wherein, when current is applied between said first and second electrodes, the titrant concentration generated in said titration reservoir is generated with 100% faradaic efficiency according to the formula: C= 60 I/F , wherein I is the current in amperes; F is Faraday's constant (96, 500 coulombs/eqiv.); and C is the concentration of titrant generated expressed in equivalents.