A potentiometric electrochemical analysis method, which comprises placing by capillary action an aqueous sample liquid to be tested for the presence of a quantity of an analyte in the sample liquid, in each of two compartments of an electrochemical analysis cell, wherein the aqueous sample liquid so...http://www.google.com.au/patents/US4966671?utm_source=gb-gplus-sharePatent US4966671 - Method and apparatus for electrochemical analysis
