Dissolved Oxygen

Dissolved Oxygen (DO) is a key measurement for understanding how well marine life can survive in the marine environment, as oxygen is necessary for aerobic organisms. Dissolved oxygen in the ocean decreases as marine life consume it, so oxygen measurements can identify the age of water bodies, and allow distinguishing of different water masses. DO measurements are vital to oceanographers studies of the ocean and observing variability due to the changing climate.

Dissolved oxygen is measured by UV titration. We use an instrument built by SCRIPPS Institution of Oceanography. The method our analysis uses is based on a whole-bottle modified Winkler titration of Carpenter (1965) with modifications by Culberson et al. (1991).

Concentration range: 0 – 400 µmol L-1

Method Detection Limit: 0.2 µmol L-1


‘Winkler Method’ Dissolved Oxygen Titration