Instructional Video
NOAA

Noaa: Estuary Education: Water Quality Specifics: Using a Colorimeter

9th - 10th
Watch students use classroom tools to measure estuarine water quality. Students sample estuary water for salinity and dissolved oxygen using a low-end colorimeter. [2:21]
Instructional Video
Bozeman Science

Bozeman Science: Ap Biology Lab 12 Dissolved Oxygen

9th - 10th
Mr. Andersen demonstrates the azide-winkler method of dissolved oxygen analysis.