四(4-甲氧基-3-磺酸苯基)卟啉分光光度法测定微量铅  

Study on T(4 MOP) PS 4 for the Spectrophotometric Determination of Micro Amounts of Lead in Dust

作　　者：陈建荣[1,2] 金炳尧 吴小华 缪吉根 汤福隆[1,2] 

机构地区：[1]浙江师范大学化学系 [2]杭州大学环境科学系

出　　处：《分析试验室》1998年第4期64-66,共3页Chinese Journal of Analysis Laboratory

基　　金：浙江省自然科学基金

摘　　要：研究了水溶性卟啉５，１０，１５，２０－四（４－甲氧基－３－磺酸苯基）卟啉［Ｔ（４－ＭＯＰ）ＰＳ４］与铅的显色反应。在ｐＨ１１和酒石酸钾存在下，铅与Ｔ（４－ＭＯＰ）ＰＳ４在室温时形成１∶１的配合物，其最大吸收波长位于４６４．４ｎｍ，摩尔吸光系数为２．３×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。铅量在０～２０μｇ／２５ｍＬ范围内符合比尔定律，工作曲线回归方程Ａ＝０．０２６２＋０．０４３５ｃ，相关系数ｒ为０．９９９２。用本法通过离子交换分离后测定了尘土中铅，结果满意。water soluble porphyrin,5,10,15,20 tetrakis(4 methoxyl 3 sulphophenyl) porphine [T(4 MOP)PS 4],for the spectrophotometric determination of micro amounts of lead(Ⅱ) has been studied.In the presence of potassium tartrate at pH11.0,lead forms a stable coordination compound with the reagent with a molar ratio of 1∶2 at room temperature.The molar absorptivity is 2.3×10 5L·mol -1 ·cm -1 at 464.4nm.Beer's law is obeyed in the range of 0～20μg/25mL.The equation of working curve is A =0 0262+0 0435 c with r =0.9992.The proposed method has been applied to the determination of lead in dust by separation with ion exchange resin.The result is satisfactory.

关 键 词：卟啉衍生物 铅 分光光度法 测定 

分 类 号：O614.433[理学—无机化学]