摘要
报道了1-(4-硝基苯基)-3-(5-溴-吡啶)三氮烯(NPBPDT)的合成及其与铜的显色反应.在NP-10的存在下,pH11.0的Na2B4O7-NaOH缓冲溶液中,该试剂能与铜发生显色反应,铜与NPBPDT形成摩尔比为1∶2型的黄色配合物,在440nm处有一最大正吸收峰,在540nm处有一最大负吸收.以440nm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1.91×105L·mol-1·cm-1,铜的浓度在0～12μg 25mL范围内遵守比尔定律.用拟定方法测定铝合金中的微量铜,结果满意.
This paper reports the synthesis of the new regent 1-(4-nitrophenyl)-3-(5-bromopyridyl)-triazene(NPBPDT) and its color reaction of NPBPDT with copper . In the presence of the surface active agent NP-10 and in the Na2B4O7-NaOH medium of pH 11.0,the reagent forms a yellow complex with copper in the molar ratio of 1:2.The molar absorptivity is 1.91×105L·mol-1·cm-1 by dual-wavelengh of 440nm and determination wavelength of 540 nm. Beer's law is obeyed in the range of 0～12μg/25mL.The method has been applied to the direct determination of copper in aluminum alloy with satisfactory results.
出处
《海南师范学院学报（自然科学版）》
2005年第1期63-65,共3页
Journal of Hainan Normal University:Natural Science
基金
丽水学院重点课题(KZ04006)
