Distinguished SOTW Member, Forum Contributor 2015-
You know better than most here that the reason a study may not be yet published is because it does not stand credible peer review. Same thing with lawsuits - just because there is a suit does not substantiate a credible claim.I'm a physicist...
There are just now some studies being done, but they are not published and they are being used to try to prevent lead from being used in mouthpieces (after all, it is just a machining convenience) through lawsuits.
Now that you have shown that a qualitative tests gives a positive result, please show that detectable levels exist in biological solutions at credible exposure environments.
Meanwhile, if you don’t want the potential of exposure, please throw away your brass mouthpiece that has proven to contain lead. If you believe it is a risk for you - and I do respect your right to make personal choices, don’t play a metal mouthpiece. Even a stainless steel mouthpiece may have had a surface treatment that leaves chemical residue.