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在非离子表面活性剂Triton X-100(聚乙二醇辛基苯基醚)存在下,用PAN分光光度法测定微量锌已有报导。随后吴诚等人将此法用于有色合金中微量锌的无氰分析。该法用于铁矿分析时,铁、锰、镍、钴、铜、镉等干扰元素仍需用三正辛基膦化氧(TOPO)-苯萃取分离。本文着重在用氯化铵-氨水分离铁的过程中加入过氧化氢和丁二酮肟,使大量锰及镍与铁一起沉淀分离。再结合使用硫脲-硫代硫酸钠-抗坏血酸和丁二酮肟混合掩蔽剂,以消除铜、钴、镉的干扰,免除了萃取分离。本法操作简便,灵敏度较高,稳定性好,符合质量要求,从而扩大应用范围,使铁矿、铜
The determination of trace zinc by PAN spectrophotometry in the presence of the non-ionic surfactant Triton X-100 (polyethylene glycol octylphenyl ether) has been reported. Then Wu Cheng et al. Used this method for cyanide-free analysis of trace zinc in non-ferrous alloys. When the method is applied to the analysis of iron ore, the interference elements such as iron, manganese, nickel, cobalt, copper and cadmium still need to be separated and extracted with tri-n-octylphosphine oxide (TOPO) -benzene. This article focuses on the use of ammonium chloride - ammonia separation of iron in the process of adding hydrogen peroxide and dimethylglyoxime, so that a large amount of manganese and nickel together with iron precipitate separation. Combined with thiourea - sodium thiosulfate - ascorbic acid and dimethylglyoxime mixed masking agent, in order to eliminate the interference of copper, cobalt and cadmium, eliminating the need for extraction and separation. This method is simple, high sensitivity, good stability, in line with quality requirements, thereby expanding the scope of application, so that iron ore, copper