Question....
The mass spectrometer is reading a percent; what is its approximate equivalent in mmHg?

Just started in the program... haven't had gas machines/instrumentations, pharm or clinicals yet.. I've read through Basic Physics and Measurement in Anaesthesia, chapters in Barash & Nagelhout about mass spectrometers.... but am stumped.

Mass spectrometers identifies compounds by their mass numbers.. I get the physics of it. (getting the compound through and charging them and then seeing how much it bends away, lighter ions bending more than heavier ones, blah blah blah)

So with a mass spectrometer reading I can determine how much of the stuff that's going in is actually my agent... right? Gives me the concentration of my agent as a percentage. But how do I get pressure (mmHg) from that???

So confused..........