T(4-AP)P的合成及与镉反应的分光光度法研究

The Synthesis of MesoTetra(4Aminophenyl) Porphyr in and Spectrophotometry Study of its Colour Reaction with Cadmium

合成了非水溶性显色剂ｍｅｓｏ－四（４－氨基苯基）卟啉（简称Ｔ（４－ＡＰ）Ｐ），研究了Ｃｄ（Ⅱ）－Ｔ（４－ＡＰ）Ｐ－Ｔｗｅｅｎ－８０－８－羟基喹啉体系的最佳形成条件，在ｐＨ１２．５～１２．８的强碱性介质中，沸水浴加热２０ｍｉｎ反应进行完全．Ｃｄ（Ⅱ）与Ｔ（４－ＡＰ）Ｐ的摩尔比为１２，在配合物最大吸收波长４４６ｎｍ处的表观摩尔吸光系数是３．０８×１０５Ｌｍｏｌ－１ｃｍ－１，镉量在０～６．０μｇ／２５ｍＬ范围内遵守比尔定律．方法应用于废水和黑米试样中痕量Ｃｄ（Ⅱ）的直接测定，结果满意．

The synthesis of a waterinsoluble colour reagent mesotetra(4aminophenyl) porphyrin (T(4AP)P) was reported.The optimum formation condition of Cd(Ⅱ)T(4AP) PTween808hydroxyquinoline system were studied.In the alkaline medium at pH 12.5～12.8 the reaction was completed by heat boiling water bath for 20 min.The molar ratio of Cd(Ⅱ):T(4AP)P was found to be 1∶2.The apparent molar absorptivity of the complex is 3.08×105 L·mol-1·cm-1 at 446 nm,Beer's law is obeyed in the rang of 0～6.0 μg Cd(Ⅱ)/25mL.The method has been applied to the direct determination of trace cadmium(Ⅱ) in the industrial waste water,black rice sample with satisfactory results.