中华医学超声杂志

应用化学 ›› 1995, Vol. 0 ›› Issue (5): 50-53.

• 研究论文 • 上一篇    下一篇

三阶导数分光光度法同时测定铜、钴与镉

肖新亮1, 刘瑞贤1, 张淑芬1, 沈含熙2, 杨俊佼2   

  1. 1. 天津大学化学系, 天津 300072;
    2. 南开大学化学系, 天津
  • 收稿日期:1994-12-31 修回日期:1995-04-20 出版日期:1995-10-10 发布日期:1995-10-10
  • 基金资助:
    国家自然科学基金资助课题

Third Derivative Spectrophtometric Simultaneous Determination of Copper,Cobalt and Cadmium

Xiao Xinliang1, Liu Ruixian1, Zhang Shufen1, Shen Hanxi2, Yang Junjiao2   

  1. 1. Department of Chemistry, Tianjin University, Tianjin 300072;
    2. Department of Chemistry, Nankai University, Tianjin
  • Received:1994-12-31 Revised:1995-04-20 Published:1995-10-10 Online:1995-10-10

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摘要： 采用三阶导数光谱技术,以meso-四(4-三甲铵基苯基)卟啉作显色剂分光光度法同时测定了微量的铜、钴与镉.方法中以铅离子掩蔽过剩试剂的吸收峰,然后进行三级微分求导,可以使铜、钴、镉吸收峰完全分开,于415nm、434nm及438nm处同时测定3元素含量,由三阶导数光谱的吸光值可求算出配合物的三阶导数摩尔吸光系数分别为:1.11×106、3.95×105及6.47×105L·mol-1·cm-1.

关键词: 铜, 钴, 镉, 同时测定, 导数光谱, meso－四(三甲铵基苯基)卟啉

Abstract: A method of third derivative spectrophotometric simultaneous determination ofmicro amount of copper,cobalt and cadmium with meso-tetrakis[4-(trimethylammonium)phenyl]porphine has been established.The absorption maxima of the third derivative spectrafor copper,cobalt and cadmium complexes were localed at 412nm,434nm,438nm,respec-tively,They could be used for simultaneous determinatlon of copper,cobalt and cadmium.The molar absorptivities of third derivative spectra were 1.11?10 6(Cu),3.95?10 5(Co)and 6.47?105(Cd)L· mol-1· cm-1,respectively,The method has been used to determine syn-thetic mixtures of copper,cobalt and cadmium,and satisfactory results were obtained withrelative errors<4%.

Key words: copper, cobalt, cadmium, simultaneous determination, derivative spectropho-tometry, meso-tetrakis[trimethylammonium phenyl]porphine

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