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Topic: Is there a way to test old NaNO2?  (Read 2549 times)

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Offline kemia_magyar

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Is there a way to test old NaNO2?
« on: October 01, 2023, 03:01:35 AM »
As the subject goes, can you test old NaNO2 to check if it oxidized to NaNO3? How would you go about it?
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Offline Borek

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Re: Is there a way to test old NaNO2?
« Reply #1 on: October 01, 2023, 03:21:51 AM »
Testing for NO3- is not easy in general, but you should be able to find a method for NO2-, and compare result with the expected, stoichiometric value.

This is not very accurate if the amount of NO3- present is very small, but still can give you a rough idea of what the situation is.
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Offline Babcock_Hall

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Re: Is there a way to test old NaNO2?
« Reply #2 on: October 06, 2023, 11:05:08 AM »
The Griess test is positive (gives a color change) in the presence of nitrite ions.  However, you might need a quantitative version of this test, and I am only familiar with qualitative versions.  As an aside, the modified Griess test is a presumptive test for some explosives.
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