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OceanGlidersCommunity / Nitrate_SOP

Standard Operating Procedure (SOP)
https://oceangliderscommunity.github.io/Nitrate_SOP/README.html
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NO3 vs NOx discussion #4

Open soerenthomsen opened 2 years ago

soerenthomsen commented 2 years ago

Copied over from gdoc!

@gkrahmann

"Somewhere we have to discuss the NO3 vs NOx issue. At the moment it's not handled well (at least for UV)."

gkrahmann commented 2 years ago

another complication:

NOx is typically used for NO + NO2 https://www.encyclopedia.com/earth-and-environment/ecology-and-environmentalism/environmental-studies/nox-nitrogen-oxides

in some parts of our community and also by myself and even the manufacturers it is also used for

N2O- + N3O-

which is of course something entirely different!!! Not being a chemist, I have never properly though this through, but now I am wondering why we (or anybody else) do not use NxO- ????

mpatey commented 2 years ago

Do you mean NO2- + NO3- (not N2O- + N3O-)?

gkrahmann commented 2 years ago

see, I am not a chemist ;-) Indeed you are correct and I should not try to understand things on a Friday late afternoon... Still it leaves the problem that NOx is used by another community for something else Would we then use NOx- ?

mpatey commented 2 years ago

I tend to avoid using NOx to mean NO2- + NO3-, because I first encountered it when studying atmospheric chemistry, and I consider it confusing to use it for something else. However, you are right that this usage is common (a quick google search seems to suggest that this is particularly the case in medical and biochemistry journals).

I sometimes use NO2+3- and I have occasionally seen NO2/3-, which I think are clearer but are not standardised.

If we need to use some shorthand, then whatever is chosen should be defined somewhere in the same document.