ChristiaanJ & M.Mouse
Looks as though posts have been removed to a new thread in Tech Log called Calculating Alcohol Levels, which IMHO is where they should have been in the first place. If one's livelihood depends upon staying 'sober' then, nomatter how that sobriety is 'tested', the only 100% safe route is abstinence. If this creates a problem for an individual, it is 'a drink problem' and, again IMHO, should be dealt with by seeking help, not by taking degree courses in chemistry and higher maths to 'beat the system'.
rts