Palladium is used in palladium-hydrogen electrodes in electrochemical studies. Examples include gold, platinum, silver, rhodium, iridium and palladium. Most other metals like copper, lead, palladium and rhodium were precipitated with zinc. Diluted nitric acid dissolved all but palladium and rhodium. Hallmarks for gold, palladium, platinum and silver from Poland. The precious metals inside the converter, including platinum, palladium, and rhodium, are extracted. Dimethylglyoxime forms complexes with metals including Nickel, Palladium, and Cobalt. Similar to these are ETFS Physical Palladium () and ETFS Physical Platinum (). Various catalytic uses of metals other than palladium (especially nickel) have been developed. At anions have been reported to form astatides with silver, thallium, palladium and lead. DmgH is used in the analysis of palladium or nickel. Similar to these are (palladium) and (platinum). The rate at which organostannanes transmetalate with palladium catalysts is shown below. This helps to remove palladium from drugs or precursors synthesized by palladium-catalyzed coupling reactions. Ethylene undergoes oxidation by palladium to give acetaldehyde.