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本文研究了利用亚硝基Ｒ盐螯合形成的树脂、分离富集试液中痕量贵金属元素铱的实验条件。并利用ＪＰ－１Ａ型示波极谱仪，在１．５０ｍｏｌ／Ｌ盐酸＋５．０×１０~（－５）ｍｏｌ／Ｌ硫脲＋０．２ｍｏｌ／Ｌ碘化钾＋碲（ρ（Ｂ）＝０．４ｍｇ／Ｌ）的混合底液中，对铱进行极谱催化波测定。在示波极谱仪上峰电位约－０．５５Ｖ（银汞齐为参比电极），可测定试液中５．０×１０~（－８）～１．０×１０~（－９）ｍｏｌ／Ｌ的痕量铱，检出限可达１．０×１０~（－１０）ｍｏｌ／Ｌ，回收率在９５％～１１０％之间，相对标准偏差为３．５％，本方法可用于测定矿石中痕量铱。
In this paper, the experimental conditions for the separation and enrichment of trace precious metal element iridium with the resin formed by chelation of nitroso R salt were studied. In the presence of 1.50mol / L HCl + 5.0 × 10 -5 mol / L thiourea + 0.2mol / L potassium iodide + tellurium (ρ (B) = 0) by using the JP-1A oscilloscope. 4mg / L) of the mixed base solution of iridium polarographic catalytic wave measurement. In the oscillopolarography peak potential of about -0.55V (silver amalgam reference electrode), the test solution can be measured 5.0 × 10 -8 -8 1.0 × 10 -9, mol / L trace iridium, the detection limit of up to 1.0 × 10 ~ (-10) mol / L, the recovery of 95% ~ 110%, the relative standard deviation of 3.5%, the method available Determination of trace amounts of iridium ore.