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本文研究了溴化 5- [4 - (3-吡啶丙氧基苯基 ) ]- 10 ,15,2 0 -三苯基卟啉 ,在 p H=4 .0时与 Cu2 + 的显色反应条件 ,其络合物最大吸收波长为 4 13nm。在相同条件下 ,试剂最大吸收波长为 4 4 4nm,对比度大约30 nm。试剂与铜络合比为 1∶ 1,表观摩尔吸光系数为 2 .9× 10 5L· mol-1·cm-1,铜含量在 0— 6 0 μg/ L范围内符合比耳定律 ,可用于痕量铜的测定。
In this paper, the color reaction of 5- [4 - (3-pyridylpropoxyphenyl)] - 10,15,2,2-triphenylporphyrin with bromine at pH = 4.0 was studied Conditions, the maximum absorption wavelength of its complex 4 13nm. Under the same conditions, the maximum absorption wavelength of the reagent is 4 4 4nm and the contrast is about 30 nm. The molar ratio of reagent to copper was 1: 1, the apparent molar absorptivity was 2.9 × 10 5 L · mol-1 · cm-1, and Beer’s law was obeyed in the range of 0-6 0 μg / L Determination of trace amounts of copper.