Determining Dissolved Oxygen in Milk

Oxygen measurement in milk is vital for the quality of the product. The transfer of the sample into the portable oxygen meter is key for accurate and repeatable results. It varies depending on the package type used for the milk product.

To maintain the quality of packaged milk, its oxygen (O2) content should be low. Oxygen in milk can influence the milk’s composition such as the vitamin content. Bacterial contamination may influence the concentration of dissolved oxygen, but generally, bacterial growth in milk can be monitored simply, quickly, and functionally by determining the amount of dissolved oxygen in milk.

Depending on the desired measuring range, two different measurement ranges are available 0 ppm to 4 ppm and 0.015 ppm to 45 ppm. Sample can be filled into the measuring cell of the portable oxygen meters directly – without changing the amount of dissolved oxygen during sample transfer – from PET and glass bottles with a filling device and pressure control unit, and from cartons with a peristaltic pump and the measurement kit for Tetra Pak.

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