Hi Ode,

The Farber nitric acid process is arcing in air, and this is why so many HVAC
people that use the arc method must use either a CO2 or Argon ambient in the 
brew
sell. But I do measure NO3 in a lot of LVDC. Generally it is about 0.90 PPM.

All HVAC process generate NO3 in excess of about 2 PPM.

"Ole Bob"

Ode Coyote wrote:

>   Doesn't it take an actual atmospheric electric arc to make nitric acid
> which then forms silver nitrate when it reacts with silver?
>  I don't recall seeing any arcing in a LVDC setup.


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