铍（Ⅱ）与对碘偶氮氯膦的显色反应及其应用研究  

Study on the Colour Reaction of Be(Ⅱ)p-Iodochlorophosphonazo and Its Applica-tion

作　　者：夏心泉[1] 赵书林[1] 马厚蓉 李昌盛 

机构地区：[1]沈阳化工学院

出　　处：《分析试验室》1995年第3期56-58,共3页Chinese Journal of Analysis Laboratory

摘　　要：本文研究了铍（Ⅱ）与对碘偶氮氯膦的显色反应。在０．１ｍｏ１／ＬＮａＡｃ溶液中，铍（Ⅱ）与显色剂生成蓝色配合物。最大吸收波长为６２０ｎｍ，其摩尔吸光系数ε＿６２０＝３．３６×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。铍（Ⅱ）含量在０～５．０μｇ／２５ｍＬ范围内符合比尔定律。配合物中Ｂｅ（Ⅱ）与显色剂的摩尔比为１：２。该方法可应用于铍青铜、铝合金及水样中微量铍的测定。方法灵敏、快速、简便。he colour reaction of Be(Ⅱ)with p-iodochlorophosphonazo(pI-CPA)has beenstudied.It is shown that the blue complex isformed in 0. 1mol/L NaAc solution. Itsmaximum absorption is located at 620mm.The molar absorptivity at 620nm is 3. 36×10￣4L·mol￣(-1).cm￣(-1). Beer’s law is obeyed inthe range of 0～5.0μg/25mL for Be(Ⅱ)。The composition of the complex is Be(Ⅱ):pI-CPA=1:2. This method is rapid andhas been applied to the determination oftrace amounts of Be(Ⅱ)in practical sam-ples,with favorable sensitivity and accura-cy.

关 键 词：对碘偶氨氯膦 分光光度法 铍 铍青铜 铝合金 

分 类 号：O614.21[理学—无机化学] O657.32[理学—化学]