|Document Type:||Journal Article|
|Title:||Impact of stirring on the luminescent optical dissolved oxygen optode|
|Author:||John Edwin Colt|
|Journal:||North American Journal of Aquaculture|
|Keywords:||dissolved oxygen,luminescent optode,stirring,|
The impact of stirring on the response of the YSI ProODO luminescence dissolved oxygen sensor or optode was measured in a 250 mL BOD with a magnetic stirrer on or off. With a water sample from a simulated fish transport experiment, the dissolved oxygen dropped by 2-3 mg L-1 when the magnetic stirrer was turned off for 11 minute. The dissolved oxygen returned to a value projected from the oxygen uptake rate when the stirrer was turned on. A much smaller impact was observed for 18.2 M high purity water (mean: -0.11 mg L-1). Acid washing the BOD bottle/stir bar and cleaning the optode cap reduced the decrease to -0.08 mg L-1. Based on t-tests between pairs of stirring-on and stirring-off, the lack of stirring had a significant impact on measured dissolved oxygen. The source of this effect and its potential impact on the accuracy of the optical probe under typical operating conditions remains to be determined.
|Theme:||Recovery, Rebuilding and Sustainability of Marine and Anadromous Species|
Maximize effectiveness and minimize impacts of artificial propagation in recovery, rebuilding and stock sustainability