04-24-2008, 10:35 AM
Yes, quite right. Rotten eggs is the wrong thing to be smelling for. Also...
Some additional research indicates that the odor threshold for SO2 is 500 ppb to 1200 ppb or even as high as more than 2000 ppb. 500 ppb is in the "warning" range and 1200 ppb is in the "unhealthy" range so it's quite likely, given the variability of peoples' olfactory sense, that by the time you smell it, you're already in trouble.
In other worlds, "if you can't smell it, you're OK" is false.
ArtM
Some additional research indicates that the odor threshold for SO2 is 500 ppb to 1200 ppb or even as high as more than 2000 ppb. 500 ppb is in the "warning" range and 1200 ppb is in the "unhealthy" range so it's quite likely, given the variability of peoples' olfactory sense, that by the time you smell it, you're already in trouble.
In other worlds, "if you can't smell it, you're OK" is false.
ArtM