Making CO2 Gas Concentrations: 50ppm, 100ppm, 1000ppm

[strokebow]

Hi,

I have a gas cylinder 99.999% CO2.

I want to apply the CO2 to my sample at different concentration. e.g.) 50ppm, 100ppm, 1000ppm.

How do I make these concentrations of CO2 from my gas cylinder? Any practical advice would be truly appreciated.

cheers

 

[russ_watters]

Mixed with what? Those first two concentrations are lower than the concentration of CO2 in air...

 

[strokebow]

Hi

thanks for replying.

I don't know what to mix with.

For example, if I wanted to make up a solution of a liquid or powder to low concentration I would just dissolve in deionized water of the correct amounts to give the desired conc.

But for gases I am not sure.

What gas to mix with? I don't know?

To get 10ppm of CO2 how would this be done? Would you mix CO2 with argon? How can you control the amount you release?

I can't find a procedure for this on the internet altough I would expect this would be common practise in some fields?

Any ideas?