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environmental impact
Proper dissolved oxygen is essential for good water quality and all forms of life require oxygen. The natural stream purification process requires proper oxygen content to supply aerobic life forms. If the oxygen content in the water is less than 5.0 mg/L, it is difficult for aquatic organisms to survive, and the lower the concentration, the more difficult it is. If the oxygen content is less than 1-2 mg / L and lasts for several hours, it will cause a large number of deaths of aquatic organisms.
Application
Dissolved oxygen electrodes can be used to measure processes that affect the rate of reaction, process efficiency or the environment, such as aquaculture, biological reactions, environmental testing (lakes, streams, oceans), water/wastewater treatment, wine production.
Temperature compensation
For standard dissolved oxygen measurements, temperature affects the solubility and diffusion rate of oxygen, so temperature compensation must be performed.
Salinity correction
The presence of dissolved salts limits the amount of oxygen that is soluble in the water. The relationship between oxygen concentration and partial pressure varies with the salinity of each sample solution, so most instrument manufacturers offer artificially adjusted salinity to correct for changes due to different ion concentrations.
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