how do I remove lead from brass plumbing fittings?-?

I've heard that there are ways to treat brass fittings to remove most of the lead, so that less will leach out into drinking water - anyone know how?

Heat them to 328C (622F) and the lead will melt and drip away. Lead would only be on used fittings in the solder used. Now silver solder is supposed to be used instead
I think you've heard wrong. brass is copper and zinc and a few other trace elements. not lead. Most modern homes are plumbed with copper pipe and fittings with low lead solder. older homes were built with lead pipes. see here http://www.filterdirect.com/leadfqa.htm I suppose if you have pipe and fittings that are soldered with high lead solder and it tests out as a problem, then you could take the pipe apart, clean the joint, and resolder it with low lead solder if you have a soldered fitting and you heat it, the solder will melt and drip away and you will have a water leak! update: lead solder was called 50:50. 50% tin, 50% lead it has been replaced with tin antimony and tin silver solders 95% tin + 5% antimony and 96.5% tin + 3.5% silver solders. the silver solder is >2x the price of the antimony one so I doubt you have it in your home plumbing. probably in your computer though on the PCB's so don't go melting the solder out of your pipes to collect the silver and get rich....
there's no lead in brass
in case its lead its usually in the form of leadsulphide....! so what u got to do is react it with dil hydrogen peroxide and its got to come off