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在一定酸度和温度条件下，用过量ＫＳＣＮ将铂族金属离子的氟络合物转变为硫氰酸络合物，最后调至～３ｍｏｌ／ＬＨＣ１酸度，用ＭＩＢＫ可将铂族金属离子的硫氰酸络合物（除Ｉｒ（Ⅳ）外）定量萃取（≥９５％）。Ｉｒ（Ⅳ）只有７４．３％被萃取，在ＭＩＢＫ中加入少量叔胺（ＴＯＡ或Ｎ＿（２３５））或氯化三正辛基甲基铵（９：１体积比）则可将Ｉｒ（Ⅲ）的异配络合物萃取９８％以上。
Under certain acidity and temperature conditions, excess KSCN is used to convert the fluor complex of the platinum group metal ions to a thiocyanate complex, and finally to ~ 3 mol / L HC1 acidity, and MIBK can convert the platinum group metal ion thiocyanate Acid complex (except Ir (IV)) Quantitative extraction (> 95%). Only 74.3% of Ir (Ⅳ) was extracted. A small amount of tertiary amine (TOA or N_ (235)) or trioctylmethylammonium chloride (9: 1) ) Isosorbide complex extracted more than 98%.