Analysis System for the Determination of Ions in an Ion-Containing Liquid Medium, and an Analysis Process Performed with the Analysis System

Analysis system for the qualitative and/or quantitative determination of ions in an ion-containing liquid medium, wherein the ions are cations (K) and/or anions (A), the analysis system comprising:

• a measuring cell (1) comprising:
• a first measuring chamber, a second measuring chamber, and a sample chamber arranged between the first measuring chamber and the second measuring chamber, wherein the sample chamber is designed to accommodate the ion-containing liquid medium,
• wherein a first electrode is arranged in the first measuring chamber and a second electrode is arranged in the second measuring chamber, and wherein a voltage can be applied between the first and second electrodes, whereby the first electrode can be positively polarized and the second electrode can be negatively polarized, and whereby the anions (A) can be transported towards the first electrode and the cations (K) can be transported towards the second electrode,
• wherein an anion-selective membrane is arranged between the first measuring chamber and the sample chamber, and a cation-selective membrane is arranged between the second measuring chamber and the sample chamber, wherein the anion-selective membrane is designed to enable a passage of anions (A) out of the sample chamber into the first measuring chamber, and wherein the cation-selective membrane is designed to enable a passage of cations (K) out of the sample chamber into the second measuring chamber,
• wherein the first measuring chamber is filled with a first liquid measuring chamber medium and wherein optionally a first detection substance (E-1) is contained in the first liquid measuring chamber medium, in order to form anion detection substance associates (A-E-1) when anions (A) pass into the first measuring chamber, and
• wherein the second measuring chamber is filled with a second liquid measuring chamber medium and wherein optionally a second detection substance (E-2) is contained in the second liquid measuring chamber medium, in order to form cation detection substance associates (K-E-2) when cations (K) pass into the second measuring chamber,
• and
• a measuring arrangement that is designed
• a. to measure the anions (A) and/or anion detection substance associates (A-E-1) present in the first measuring chamber photometrically by way of a photometric measurement, and to determine the anions (A) qualitatively and/or quantitatively on the basis of this/these measurement(s), and/or
• b. to measure the cations (K) and/or cation detection substance associates (K-E-2) present in the second measuring chamber photometrically by way of a photometric measurement, and to determine the cations (K) qualitatively and/or quantitatively on the basis of this/these measurement(s).