mg of oxygen per liter to percent of oxygen in air

[Unregistered]

Does anyone know this conversion?

Thank you.

[JohnS]

Re: mg of oxygen per liter to percent of oxygen in air

Does anyone know this conversion?

Thank you.

No, the density(mass of a liter) of air changes with temperature and pressure, so you would have to define those.

In "normal" air, it is 21% O2 on a mole fraction basis, or
21 mol O2 per 100 mol of air.

Since O2 has a moleculare weight of 32, and air 29, on a mass/mass basis, this is 0.21 x 32/29 = 0.232 kg O2/ kg air. That will be independent of temperature and pressure.

Divide by density of air at your temp. and pressure; you'll have mass of O2 per volume of air.

[BabylonBob]

Re: mg of oxygen per liter to percent of oxygen in air

I don't see any correction for the amount of water vapor in the air (gr/lb), which would affect the oxygen content.

[Unregistered]

Re: mg of oxygen per liter to percent of oxygen in air

lpm*4+20=FiO2