向红菲啰啉已广泛应用于水、血清、高纯ZnO和Cu、Co、Ni、Pt等纯金属中痕量Fe的萃取光度测定,但操作手续较为复杂,并使用了苯等有毒溶剂。为此,有文献将Triton X-100引入向红菲啰啉测Fe体系实现水相测定。本文采用吐温-40作增溶剂,在水相中测定Fe,灵敏度为邻菲啰啉的2倍。方法用于白云石、长石、粘土、萤石、石膏等矿石中Fe的测定,结果满意。 The red phenanthroline has been widely used in the determination of trace Fe in pure water such as water, serum, high purity ZnO, Cu, Co, Ni, Pt and so on. However, the operating procedures are complicated and the toxic solvents such as benzene are used. For this reason, there is literature to introduce Triton X-100 into red phenanthroline Fe system for water phase determination. In this paper, Tween-40 as a solubilizer, Fe in the aqueous phase, the sensitivity of phenanthroline 2 times. The method was applied to the determination of Fe in dolomite, feldspar, clay, fluorite, gypsum and other ores with satisfactory results.