Apparatus, system, sensor and method for determining dissolved oxygen content in a medium

A method for determining dissolved oxygen content in a medium, comprising:

• submerging a moving device comprising a dissolved oxygen sensor in the medium such that the dissolved oxygen sensor is in contact with the dissolved oxygen content in the medium, wherein the dissolved oxygen sensor is positioned at an edge portion of the moving device;
• fixing a light irradiation source at a central portion of the moving device which is independent from the edge portion of the moving device, thereby defining an optical path between a light irradiation source and the dissolved oxygen sensor through the medium;
• controlling the irradiation source to irradiate the dissolved oxygen sensor at a predetermined wavelength for a predetermined period of time;
• irradiating at least one photo-oxidizable compound deposited over a solid support surface of the dissolved oxygen sensor using the light irradiation source to facilitate generation of singlet oxygen, wherein an irradiation reacting with the at least one photo-oxidizable compound functions to convert the photo-oxidizable compound into a photosensitizer arranged to react with the dissolved oxygen in ground state to generate the singlet oxygen;
• determining the dissolved oxygen content of the medium based upon the irradiation of the at least one photo-oxidizable compound, using the light irradiation source by irradiating the at least one photo-oxidizable compound using a UV irradiation source to generate the singlet oxygen in a presence of dissolved oxygen in the ground state in the medium, wherein the at least one photo-oxidizable compound is a derivative of anthracene selected from at least one of 9,10-dimethylanthracene, and 9-carboxymethyl-10-methylanthracene;
• and
• generating an impedance response on an interdigitated conducting electrode patterns disposed on the solid support surface, wherein the impedance response is in accordance with a content of the dissolved oxygen in the medium in which the dissolved oxygen sensor is submerged;
• wherein the at least one photo-oxidizable compound is arranged to receive the irradiation from the light irradiation source having a predetermined light intensity for a predetermined time;
• and
• wherein the at least one photo-oxidizable compound changes its luminescent properties based upon a reaction with the singlet oxygen, and wherein the singlet oxygen is generated upon irradiation of the photo-oxidizable compound when the photo-oxidizable compound is in contact with the dissolved oxygen in the medium.