Abstract: A method for recovering precious metals from ore is disclosed. Ore is treated in an acidic slurry with an activated oxygen mixture obtained from an ultraviolet light ozone generator. The activated oxygen frees chemically bonded precious metals creating an expanded, hydrated ore so that the metals may be oxidized and leached out using standard leaching techniques. In addition, the activated oxygen aids in the leaching process. Substantial increases in the amount of precious metal recovered from a given amount of ore result.

Abstract: A method for plating metallic leads or terminals of integrated circuits having a leaded glass component with a plating composition that avoids dentrite growth, can be soldered, and is corrosion resistant is disclosed. According to the method, the metallic element is electroplated with lead and tin simultaneously. An aqueous plating solution comprising water, sulphate ion, tin, and chelated lead, where the lead is chelated with either ethylene diamine or ethylene diamine gluconate, is formed. The metallic element with a leaded glass portion is placed in the solution and an electrical current is passed through this solution to deposit lead and tin on the metallic element to form a plating comprising at least about 90 percent by weight tin, and at least about 2 percent by weight lead. The plating solution and the plated substrate produced by the method of the present invention are also novel.