本文研究了用硼氢化钾(KBH_4)在氮气流下还原锑离子为SbH_4气体,可以用少量硝酸汞硫酸溶液吸收.亚锑离子在碘离子存在下,可直接与5-Br-DEPAP萃取比色.经过富集与分离从而更加提高了方法的灵敏度与选择性,扩大了应用范围。本法锑的回收率达92%以上;锑含量在0.04—1微克/毫升呈直线,检测下限为0.02微克/毫升。 In this paper, KBH4 was used to reduce Sb (superscript 3+) in SbH4 gas under a nitrogen gas flow, which can be absorbed by a small amount of mercury nitrate sulfate solution.The strontium sulfide ions can be directly extracted by 5-Br-DEPAP in the presence of iodide ions. After enrichment and separation so as to further improve the sensitivity and selectivity of the method, expanding the scope of application. The antimony recovery rate of this law is above 92%; antimony content is 0.04-1 microgram per milliliter is straight line, the detection limit is 0.02 micrograms / milliliter.