Narcosis

[igotoofar]

I was thinking about this last night.

O2 has a toxicicity issue at ATA1.6 Max with most using ATA1.4

Does Nitrogen have a similar value? kind of a MND (Max Nitrogen Depth)
Example:
Air at 100ft would have PPN 3.16393939ATA

Many feel diving air to a depth of 100ft is a good limit.

Could one then say Trimix with 40% Nitrogen would give the same Nitrogen Narcosis at 229ft as air would at 100ft ? I understand I have simplified the #'s by not including the Helium or Oxygen in the mix with regard to their narcotic effects. But the idea is the same.

Thoughts?