Danger varies with quanity strictly. Simply buy a metal camp cup,ascertain what direction the wind is blown',go upwind and burn it off in a campfire. You can use dangerous acids but then your talkn' real danger. For quanties of gold mercury mix a mercury press is best-no heat or acid just air pressure to remove the bulk of free liquid mercury and good to go to heat. You can retort also with heat but simple micron contamination does not require such extremes. Quanity of contamination is the predicationg factor in removal. This newfound econazi fanaticism on mercury is unwarranted as homes now crammed fulla lightbulbs of all kinds-mandatory in kalif-( that's 100s a times the amount of mercury found on gold )and it's vaporized in it's most dangerous form to make light in a thin fragile glass squiggly or long glass tube. But that's allright hahahaha. Mercury is a naturally occuring metal and the kalif state geo bulletin 191 shows the kalif coastal ranges dump tons a year into the air,water and sea.-John PS-err on the side a caution,wear gloves,be upwind and stay away from dangerous acids