Cu00c9lula for secondary mediu00c7u00e7o pH of a fluid and process for the mediu00c7u00e7o

摘要

Cu00c9lula for secondary mediu00c7u00e7o pH of a fluid and process for the mediu00c7u00e7o.The present invention is directed to a cell for measuring the pH of a secondary fluid comprising a first and a second column (a ') which communicate by a first junction of porous material (c), in which each column (a') is connected to a gas inlet tube (a); each C Oluna (a ') has an upper region (E), an intermediate region (f) and a lower region (g).And these regions are separated from one another by a second junction of porous material (d), columns (a ') communicate with a first junction of porous material (c) through the upper region (E); each tube (a) communicates with each column (a') through the lower region (g); and The upper region (E) for each column (a ') presents in its upper end with an aperture (b); and a provisionStudy of measurement of potential difference is provided in the upper region (E) in contact with the medium of pH to be determined.Also refers to a process for measuring secondary pH comprising the following steps: (1) to fill the regions (E) and (f) of the first column (a ') with a buffer solution of pH known; (II) to fill the regions (E) and (f) of the second column (") with a buffer solution of pH to be Determined; (III) to inject gas continuously through the tube (a); (IV) to measure the potential difference between theBuffer solutions contained in the higher regions (E); (V) to obtain the pH of buffer solution of pH to be determined.