BioBoard/Documentation/Oxygen - Revision history

Yesac: Protected "BioBoard/Documentation/Oxygen": Excessive spamming (‎[edit=autoconfirmed] (indefinite) ‎[move=autoconfirmed] (indefinite))

2013-09-13T01:38:57Z

Protected "BioBoard/Documentation/Oxygen": Excessive spamming (‎[edit=autoconfirmed] (indefinite) ‎[move=autoconfirmed] (indefinite))

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2013-09-12T11:51:26Z

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2013-09-11T22:16:16Z

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2013-09-07T00:49:43Z

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2013-09-06T22:45:34Z

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2013-07-18T17:13:08Z

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2013-07-18T15:45:41Z

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2013-04-11T18:44:12Z

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2013-04-11T17:42:38Z

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Turbclnt at 06:53, 4 May 2011

2011-05-04T06:53:21Z

← Older revision		Revision as of 23:53, 3 May 2011
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	[[File:Assembled.jpg\|center]]		[[File:Assembled.jpg\|center]]

	=~~Interfacing and measuring~~=		=Making it cooler=

	~~=Calibrating~~ a ~~home-built optode=~~		So, I do need to bring this up one more time: '''This optode did not work'''. I'm 90% sure it had to do with not being able to produce a film of uniform coverage in a reliable manner. Suggestions here are welcomed! So, undoubtedly, this would be the way to make it waaaaay cooler.

	~~=Making~~ it ~~cooler=~~		In addition, this probe was not made with any type of calibration, so it would only be useful for tracking relative changes in dissolved oxygen in a single system. Adding a calibrated system to the arduino code would make results transferable probe to probe.

	=Geeking out=		=Geeking out=

			There is more than 1 way to use fluorescence to measure oxygen. Instead of using intensity of light produced (easiest to implement, but hardest to calibrate), you could instead measure the decay rate - i.e. the amount of time it takes for the film to go from illuminated to non-illuminated in the presence of no light. If you couple this with a '''red''' LED (which the film will not absorb), you have an internal standard that need not be calibrated for a very, very long time. Awesome! The problem is, this decay rate is very fast - on the nanosecond order, so the backend electronics would need to be more sophisticated. In addition, the red LED would likely not be properly filtered out by the phototransistor, thus requiring the need for a bandpass filter, raising complexity and cost.

	=Links=		=Links=
			* I promise people have gotten this to work - [http://www.pco.de/fileadmin/user_upload/db/download/GHoBGr_SAB74_78_90.pdf check this out!]