对三氟甲基偶氮氯膦与铁(Ⅲ)显色反应及在离子膜制碱质量控制中的应用  

Color Reaction of Fe(Ⅲ) with p-Trifluoromethyl-chlorophoshonazo and Application to the Quality Control in Alkali Production by Ion Membrane

作　　者：庞文生[1] 胡娟 张华山[3] 

机构地区：[1]平顶山工学院环工系,河南平顶山467000 [2]平顶山师专化学系,河南平顶山467002 [3]武汉大学化学化工学院,湖北武汉430074

出　　处：《化学世界》2003年第4期188-190,共3页Chemical World

摘　　要：研究了新合成试剂对三氟甲基偶氮氯膦与 Fe3+离子的显色反应 ,在 p H=1 .0的 HCl介质中 ,对三氟甲基偶氮氯膦与 Fe3+离子生成紫红色的配合物 ,其最大吸收波长的位置在 6 6 9nm,摩尔吸光系数为 1 .7× 1 0 5,铁离子浓度在 0～ 0 .3 mg/L范围内符合比尔定律 ,将之用于离子膜制碱过程精制盐水中铁的测定 ,方法灵敏度、准确度高 ,测定干扰少 ,其结果令人满意。The color reaction of iron (Ⅲ) with a new reagent p-trifluoromethyl-chlorophophonazo has been studied. Results show that iron (Ⅲ) reacts with the color reagent to form 1∶3 stable redpurple complex in HCl medium of pH1.0. The absorption maximum is at 669 nm, the apparent molar absorptivity is 1.7×10 5 L/(mol·cm). Beer's law is obeyed in the range of 0～0.3 mg/L. The method is highly sensitive. It has been applied to the analysis of iron in the refined salt water of alkali processing by ion membrane, and there are no ions to interfere with the determination. The results are satisfactory.

关 键 词：对三氟甲基偶氮氯膦 铁 分光光度法 离子膜制碱 质量控制 应用 显色反应 中控分析 

分 类 号：TQ114[化学工程—无机化工] O614.811[理学—无机化学]