HowStuffWorks "How Breathalyzers Work"
As the blood goes through the lungs, some of the alcohol moves across the membranes of the lung's air sacs (alveoli) into the air, because alcohol will evaporate from a solution -- that is, it is volatile. The concentration of the alcohol in the alveolar air is related to the concentration of the alcohol in the blood. As the alcohol in the alveolar air is exhaled, it can be detected by the breath alcohol testing device. Instead of having to draw a driver's blood to test his alcohol level, an officer can test the driver's breath on the spot and instantly know if there is a reason to arrest the driver.
Because the alcohol concentration in the breath is related to that in the blood, you can figure the BAC by measuring alcohol on the breath.
Will Crest mouthwash make me fail a breathalyzer?
Having been a police officer for eight years and administering hundreds of B.A.C. (Blood Alcohol Concentration) tests over the years, I can tell you it is POSSIBLE, but highly unlikely. When you use a mouthwash that contains alcohol, SOME of the alcohol will be absorbed by the skin cells inside your cheeks while you rinse. However, assuming you do not swallow the mouthwash, the amount will be very small, not even detectable in your breath. However, some of the alcohol will also "stick" to the inside of your mouth, and be detectable in your breath. The amount of time this is detectable is normally 7-8 minutes. This is known as "raw mouth alcohol". This is why police officers cannot do a breathalyzer test without waiting a required 15 minute wait period since a person's last drink. Of course, in practice, if a person is arrested on suspicion of DUI, the time period from when the person is pulled over and given the breath test is usually at least 30 minutes, and sometimes more, depending on the nature of the traffic stop, distance from the testing facility, etc..
"A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murder is less to fear"
Cicero Marcus Tullius
On the bright side this thread has determined who should never be listened to about anything, ever, ever, ever, ever.
Apdst, Excon, Muhammed, I'm looking at you.