铂族金属的化学稳定性按以下次序递增:钯、铂、锇、铑、钌、铱。除了钯及铂可被单一酸或王水溶解外,其余的则难溶于各种酸或王水中,特别是铱及其合金在通常条件下更是难溶。在化学分析中,特别是在进行高纯分析时,为了防止杂质引入,对铂族金属及其合金的溶解更会遇到一些困难。过去,在化学及冶金工作中对铂族金属的溶解采取了各种间接方法。这些方法皆会引入大量杂质,且麻烦费时。为了避免引入大量杂质有用 The chemical stability of the platinum group metals increases in the following order: palladium, platinum, osmium, rhodium, ruthenium, iridium. In addition to palladium and platinum can be a single acid or aqua regia dissolved, the rest is difficult to dissolve in a variety of acids or aqua regia, especially iridium and its alloys under normal conditions is more insoluble. In chemical analyzes, especially when performing high purity analyzes, some difficulties are encountered with the dissolution of platinum group metals and their alloys in order to prevent the introduction of impurities. In the past, various indirect methods have been adopted for the dissolution of platinum group metals in chemical and metallurgical work. These methods will introduce a lot of impurities, and the trouble time-consuming. Useful to avoid the introduction of large amounts of impurities