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  2. Winkler titration - Wikipedia

    en.wikipedia.org/wiki/Winkler_titration

    The amount of dissolved oxygen is a measure of the biological activity of the water masses. Phytoplankton and macroalgae present in the water mass-produce oxygen by way of photosynthesis. Bacteria and eukaryotic organisms (zooplankton, fish) consume this oxygen through cellular respiration. The result of these two mechanisms determines the ...

  3. Oxygen saturation - Wikipedia

    en.wikipedia.org/wiki/Oxygen_saturation

    Dissolved oxygen levels required by various species in the Chesapeake Bay (US). In aquatic environments, oxygen saturation is a ratio of the concentration of "dissolved oxygen" (DO, O 2), to the maximum amount of oxygen that will dissolve in that water body, at the temperature and pressure which constitute stable equilibrium conditions.

  4. Lajos Winkler - Wikipedia

    en.wikipedia.org/wiki/Lajos_Winkler

    In 1888, while still a doctoral student, Lajos Winkler discovered a much safer, and more precise, method of dissolved-oxygen analysis, which is still widely used today. [5] The Winkler method uses the dissolved oxygen to convert manganese(II) hydroxide into manganese(III) species, and then analyzing for the latter by titration .

  5. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Most aquatic habitats are occupied by fish or other animals requiring certain minimum dissolved oxygen concentrations to survive. Dissolved oxygen concentrations may be measured directly in wastewater, but the amount of oxygen potentially required by other chemicals in the wastewater is termed as oxygen demand. Dissolved or suspended oxidizable ...

  6. Analysis of water chemistry - Wikipedia

    en.wikipedia.org/wiki/Analysis_of_water_chemistry

    Nephelometers are used to measure solids concentrations as turbidity. These methods are generally robust and well tried and inexpensive, giving a reasonable degree of accuracy at modest sensitivity. Electro chemistry including pH, conductivity and dissolved oxygen using oxygen electrode. These methods yield accurate and precise results using ...

  7. Biochemical oxygen demand - Wikipedia

    en.wikipedia.org/wiki/Biochemical_oxygen_demand

    BOD test bottles at the laboratory of a wastewater treatment plant. Biochemical oxygen demand (also known as BOD or biological oxygen demand) is an analytical parameter representing the amount of dissolved oxygen (DO) consumed by aerobic bacteria growing on the organic material present in a water sample at a specific temperature over a specific time period.

  8. Microphysiometry - Wikipedia

    en.wikipedia.org/wiki/Microphysiometry

    The primary parameters assessed in microphysiometry comprise pH and the concentration of dissolved oxygen, glucose, and lactic acid, with an emphasis on the first two. Measuring these parameters experimentally in combination with a fluidic system for cell culture maintenance and a defined application of drugs or toxins provides the quantitative ...

  9. Water testing - Wikipedia

    en.wikipedia.org/wiki/Water_testing

    Participants learn how to conduct simple water quality tests, analyze common indicators of water health, specifically dissolved oxygen, pH, temperature, and turbidity. The program was originally called "World Water Monitoring Day" and later "World Water Monitoring Challenge", and was established in 2003.

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