Sorry, I don't know the direct answer to your question, but I will throw in that we tested cigarette smoke for mercury when we rented the mercury meter, and we got readings of well over 100 ug /m3 when measuring exhaled smoke about 10 feet away on a windy day. We have this all on video and will eventually post it here. This amount is about 3 times the amount we found in the mouths of 75% of persons with amalgam fillings.