I made a breathalyzer using a MiCS-5524 gas sensor. I would like to calibrate it so it can be close to accurate. e2v technologies — MiCS Application Note 4, Using MiCS Sensors for Alcohol Detection (PDF) shows a method of heating an alcohol/water solution and testing the air that has been bubbled through the mixture.
If I was to heat a liter of alcohol/water solution to 37 °C, what ratio of alcohol to water would I need to make the air have 10 ppm of alcohol? I don't have much experience with chemistry so please keep that in mind when you explain the solution.