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Topic: How would you test for these gases?  (Read 10984 times)

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Offline jdurg

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Re: How would you test for these gases?
« Reply #15 on: June 07, 2006, 10:02:58 PM »
NO2 also has that "stuck in traffic behind an old beat up car with no catalytic converter" smell to it.  Kind of smells like bleach, but it distinctly different.
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Offline bramgo

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Re: How would you test for these gases?
« Reply #16 on: June 08, 2006, 11:40:41 AM »
Oooo cool :o! But isn't that cheating :P!? I think  jgaoxx06 wanted to know about a specific chemical test for NO2 and oxides of sulfur. My teachers wouldn't have been too impressed if I told them that a test for these gases was to test them with specific kits which test for the gas in question! ;)

- You are right, it is a bit cheating maybe. Allthough it was my prof who told me to do it like that. :)

- However I heard there's a more impressive way of doing it:
When reactions take place there are photons exchanged (Chemoluminescence). There is a cool theoretical function to know how much light is emitted. (People familiar with electronics will probably know something more about this. I think it's also related to the working of Light Emitting Diodes. I recall something like that from my earlier studies.)
In short... You could let NO react with ozon (O3) for instance. It will emit light. This can be measured with a photodetector.

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