Gold Recovery from Gold Plated Pins and Connector Pins
#0183;#32;Dip 1 kg connector pins in five litter HCl (hydrochloric acid or muriatic acid). Then add 1liter water. Approximately 1 to L nitric acid will use for I kg gold plated connector pins. But add nitric acid 200 ml every time. When reaction will end then again add more nitric acid until all metals dissolve.