electroanalytical method Clark-type oxygen electrode method 2013-06-07T17:18:36Z A polarographic method for measuring oxygen (O2), the chemical element with atomic number 8 which is the essential agent in the respiration of plants and animals, in which a voltage is applied to a platinum electrode covered by a semipermiable membrane specific for oxygen resulting in the reduction of O2 according to the reaction [O2 + 4e- + 2 H2O --> 4 OH-] and the production of a measurable current in proportion to the oxygen tension in the measured sample. Clark electrode method JSmith MMO:0000387 dissolved oxygen electrode method measurement_method_ontology oxygen membrane polarographic detector method oxygen sensor method pO2 electrode method