I work in a physiology lab and need to buy around 4-5 liters of a mixed gas containing O2, CO2, and N2 in very exact percentages. Does anyone know where I can get this around Kunming?

Thank you!!

as far as i know,i think you can find what you need near the back street of kunming NO1 Middle school, my tutor used to buy chemical materials for LAB over there

Hi, I didn't want to spoil your forum post. But I think if you stand along a street and breathe in deeply, you have already got a very specific combination of the gasses you are looking for.

But seriously, maybe speak to a lab professor at one of the universities. They may be able to order your supplies at the same time.