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Gas phase oxygen measurements

Alejandro Rivero rivero at sol.unizar.es
Mon Jul 21 23:24:12 EST 1997


ccockell at mail.arc.nasa.gov wrote:
>
> Hello,
>
> I wondered if anyone could provide me with some advice. I am in the process
> of selecting a sensor to measure O2 production in the gas phase as a
> measure of photosynthesis. We have a given size of chamber and in order to
> select the right sensor I need to get some ballpark figures on rates of O2
> production/time for a few organisms. I appreciate that there will be great
> varaiability depending on conditions, but a general ballpark would be of
> great help if someone could throw some figures.

two comments from a novice:

Is all the O2 liberated to atmosphere, or some part is retained and
used by the plant?

As the production comes directly from water, plots would exist correlating
produced 02 and consumed water. BTW, even the consum of water will indicate
you the quantity of O2, then. Is it so easy, or is water used, at
noticeable quantities, for other purposes. ?

						Alejandro





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