Dissolved Oxygen Determination: Detection Methods

What Does Dissolved Oxygen in Water Mean? Why is Dissolved Oxygen Determination Done?

What is Dissolved Oxygen?

Oxygen molecules dissolved in a body of water are referred to as dissolved oxygen (DO). Dissolved oxygen is an important parameter for the survival of underwater creatures and for the aquatic ecosystem to remain in balance. Oxygen can be mixed into the water through contact with the atmosphere, photosynthesizing plants and algae.

What Does Dissolved Oxygen in Water Mean?

Dissolved oxygen levels in water allow us to see whether the water is suitable for living life, the quality of the water body and ecosystem health.

• High dissolved oxygen values indicate that the water can support the ecosystem and that fish and other aquatic life live in a healthy environment.
• Low dissolved oxygen values indicate pollution, an overload of organic matter, or oxygen-depleting processes (e.g. decay).

Why Dissolved Oxygen Determination?

The reasons for the determination of dissolved oxygen can be listed as follows:

• Assessing water quality,
• Monitoring the health of the aquatic ecosystem,
• To check whether oxygen levels support living life.

Fish, plants and other aquatic organisms need certain levels of oxygen to survive. This determination is also used to measure the level of water pollution, as factors such as water pollution, industrial waste and agricultural activities can affect dissolved oxygen levels. It can also be applied in water pollution prevention processes.

What are Dissolved Oxygen Determination Methods?

Commonly used methods for the determination of dissolved oxygen are as follows:

• Winkler Method: It is one of the most classical and common methods generally used in the laboratory environment. It chemically determines the dissolved oxygen level by titration method.
• Electrochemical Method (Oxygen Probe Method): This method is suitable for field measurements and gives fast results. With the help of an oxygen probe placed in the water, the amount of dissolved oxygen is measured directly.
• Fluorescence Method: It enables the measurement of dissolved oxygen with fluorescence technology. It is a highly sensitive and accurate method.

Nanolab Laboratories Group continues to provide services within the scope of Dissolved Oxygen Determination in Water. We also provide services in Water Analysis.

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