On Mon, 16 Jun 2008, Alan B. Pearce wrote: > But I suspect the OP is attempting to distinguish what he wants from other > compounds of mercury that come in powder form (I think mercury fulminate is > one, but it is a component of some explosives IIRC). You are correct. I should have said "elemental" mercury I suppose. :-) Trying to clean the scum off dirty mercury is 'fun' too. Distilling it is simply insanity outside a fully equipped lab. Disolving the impurities with nitric acid is less insane, but still dangerous. Best method I can see is dripping it slowly through a tiny hole until all the impurities are contained in the final drop. -- Ian Smith www.ian.org -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist