depends on machine and operator I suppose. These are quite expensive tools, and I just discovered them a few days ago. They are used in mineral prospecting, and will do elemental composition in ppm I think.
Bill Hall ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list