I am currently working on metal oxide gas sensor fabrication. I came across several papers saying when they mix 10ppm of acetone with synthetic air and then tune it with mass flow control to obtain a variety of acetone gas concentrations. I am confused about how they mix the acetone with synthetic air. I am unable to find acetone gas been sold in Hong Kong therefore I assume the mixing of the acetone with synthetic air was from acetone solution. However, acetone does not turn into gas unless it is at 85 degrees C. It seems to me that it is unlikely for people to heat up a pressurized gas tank.
I tried to tackle this problem by setting up a bubbler setup as well with a diaphragm pump pumping air through a diffuser into acetone solution. However, I do not see any reliable way to calibrate the output gas without putting the bubbler in connection with a mass spectrometer. Please let me know if I am missing something here???
The paper I am trying to follow at the moment is from https://pubs.acs.org/doi/abs/10.1021/ac902695n?casa_token=v2tbdeZFsMkAAAAA:cuE3zxkrobr-pduwTvtHib0u8-VoGG0N2t_mW1v8pbf0gbaRJAd22-gfRoHNMLoFAR_hui-P8ECyXAvnMw
Aceton being a VOC has a high vapour pressure, meaning if you leave the bottle open, the liquid turns into gas so quickly (like perfume).
So what you can do, is to make a closed system (like attach a tube to the liquid aceton bottle), aceton gas will form above the liquid. Now having some fittings and ball valve, you can extract the gas/vapour and feed it in to your system (mixing with air or whatever).
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