研究了用锑作捕集剂富集铱的火试金法，此法分为捕集和灰吹两部分。当样品同含有氧化锑、碳酸钠、碳酸钾、硼砂和面粉的熔剂混合，在950℃熔融时，铱被捕集在熔融的锑中。然后灰吹此锑合金可得到含铱的试金合粒。结果表明，锑试金与ICP-AES法结合，能准确测定冶金富集渣中的铱。铱的回收率96.35%~98.93%，相对标准偏差小于3%。方法简便、快速，准确。
The fire assay is studied with antimony as a collector for enrichment of iridium. The method is divided into trapping and ash blowing. When the sample is melted at 950℃ with a mixture containing flour antimony oxide, sodium carbonate, potassium carbonate, borax and flour, the iridium is trapped in a molten antimony. Then ash blowing the antimony alloy can be obtained an assay bead with iridium. The results showed, antimony assaying method combined with ICP-AES, can determine iridium in metallurgical enriched slag accurately. The standard recovery is 96.35%~98.93%, the relative standard deviation is less than 3%. The operation of the method is simple, rapid and accurate.
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