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Topic: How to standardise sodium nitrite?  (Read 6629 times)

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Offline Spink

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How to standardise sodium nitrite?
« on: December 12, 2006, 01:40:38 PM »
I want to use sodium nitrite (NaNO2) to do a titration, but I guess I first have to standardise the sodium nitrite with another compound. Which compound can I use for this purpose?

Thank you in advance!
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Offline Alberto_Kravina

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Re: How to standardise sodium nitrite?
« Reply #1 on: December 12, 2006, 02:51:48 PM »
Quote from: Spink on December 12, 2006, 01:40:38 PM
I want to use sodium nitrite (NaNO2) to do a titration, but I guess I first have to standardise the sodium nitrite with another compound. Which compound can I use for this purpose?

Thank you in advance!
For which titration do you need the sodium nitrite, just out of curiosity?
You could standardize it with a KMnO4 solution (which you must standardize with oxalic acid dihydrate before using it)
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Offline Spink

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Re: How to standardise sodium nitrite?
« Reply #2 on: December 12, 2006, 04:53:19 PM »
Thank you! I also read about sulfanilic acid to standardise NaNO2, maybe that will work too?

I'm going to use it to titrate caffeine (diazotation reaction).
Are there maybe better methods for determining the concentration of caffeine in farmaceutical samples?

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Offline Spink

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Re: How to standardise sodium nitrite?
« Reply #3 on: December 13, 2006, 04:13:40 PM »
Sorry, I was wrong. I'm going to titrate phenacetin with it (diazotation reaction), not caffeine of course. Caffeine is the other compound I have to analyse.
Are there maybe better ways to quantify these compounds?  ???
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