新显色剂NPHMPDT的合成及其与镉的显色反应  

Synthesis of NPHMPDT and its color reaction with cadmium

作　　者：张春牛[1] 郑云法[1] 王慕华[1] 

机构地区：[1]丽水学院化学系,丽水323000

出　　处：《分析试验室》2009年第2期107-110,共4页Chinese Journal of Analysis Laboratory

摘　　要：报道了1-(4-硝基苯基)-3-(4-羟基-6甲基-嘧啶)-三氮烯(NPHMPDT)的合成及其与镉的显色反应研究。在表面活性剂OP存在下,pH11.0的Na2B4O7-NaOH缓冲溶液中,该试剂能与镉发生显色反应,镉与NPHMPDT形成摩尔比为1∶3型的淡黄色配合物,在450nm处有一最大正吸收,在540nm处有一最大负吸收。以450nm为参比波长,540nm为测量波长进行双波长测定,表观摩尔吸光系数为4.88×105L.mol-1.cm-1,镉的质量浓度在0～480μg/L范围内符合比尔定律。This paper reports the synthesis of a new reagent 1-（4-p-nitrophenyl）-3-（4-hydroxyl-6-methyl-pyrimidine）- Triazene （NPHMPDT） and the color reaction of NPHMPDT with cadmium. In the presence of the surfactant OP and in the Na2 B4O7-NaOH medium of pH 11.0, the reagent form a complex with cadmium in the molar ratio of 1 ： 3. The apparent molar absorptivity is 4.88 ×10^5L·mol^-1·cm^-1 by double wavelength spectrophotometry. The measuring wavelength is 450 nm and the reference wavelength is 540 nm. Beer＇s law is obeyed in the range of 0 - 480 μg/L. The method has been applied to the direct determination of cadmium in waster water with satisfactory results.

关 键 词：1-(4-硝基苯基)-3-(4-羟基-6甲基-嘧啶)-三氮烯 镉 显色反应 

分 类 号：O657.3[理学—分析化学]