| abstract |
The present invention provides an electrode arrangement for the electrochemical analysis of components of a liquid, having a base body (7; 53; 85; 103; 139; 155; 175; 193), made of an insulating material with at least one measurement electrode (21; 57; 89; 111; 143; 157; 195) held on the base body, adapted to be brought into phase boundary contact with the liquid to be analysed, said measurement electrode being selective for a predetermined kind of ion in the liquid, and with at least one reference electrode (19; 55; 87; 109; 141; 153; 173; 197; 199) held on the base body and adapted to be brought into phase boundary contact, together with the measurement electrode, with the liquid, wherein the base body carries a removable closure part (45; 61; 91; 107; 137; 163; 187; 203) which, together with the base body, forms a closed hollow chamber (11; 52; 86; 104; 135; 159; 177; 201), the closed hollow chamber containing a standard electrolyte, especially one containing the predetermined kind of ion, defining, with the ion-selective measurement electrode, a predetermined half cell potential, said standard electrolyte being in phase boundary contact not only with the or each measurement electrode but also with the or each reference electrode. |