【摘要】 根据在邻菲罗啉的活化下Ｆｅ３＋对ＫＩＯ４氧化罗丹明Ｂ褪色的催化作用，利用流动注射技术，建立了一个痕量铁的在线监测的新方法．该方法Ｆｅ３＋的浓度在０～８×１０－５ｇ／Ｌ和８×１０－５～２．８×１０－４ｇ／Ｌ范围内分段与褪色效应呈良好线性相关，检出限为：１×１０－７ｇ／ＬＦｅ３＋（３δ）；ＲＳＤ≤１．６％（ｃ＝５×１０－５ｇ／Ｌ，ｎ＝１１）．利用该方法对水样中铁进行在线监测，效果满意更多还原

【Abstract】 A new FIACatalytic Kinetic Spectrophotometric method for the determination of trace iron(Ⅲ) on line is described. The method is based on catalytic effect of iron(Ⅲ) on the oxidation of Rhodamine B by KIO 4 in the presence of OPhenanthroline as an activator. The linear range of the concentration for iron ion(Ⅲ) related to fading reaction is from O to 8×10 -5 g/L and from 8×10 -5 g/L to 2 8×10 -4 g/L. The detection limit (3σ) for iron (Ⅲ) is 1 0×10 -7 g/L. The method has been used to the determination of trace iron(Ⅲ) in water samples on line with satisfactory results.更多还原