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继铬天青S和漂兰6B为显色剂的稀土四元络合物显色反应的研究之后,本文又系统地研究了稀土-铬菁R(ECR)-5-硝基邻菲罗啉(5-N-Phen)—溴化十二烷基吡啶(DPB)体系的络合显色反应。结果表明,该体系也具有较高的灵敏度,四元络合物的摩尔吸光系数(‘)最高达1.85×10~5(Lu),按双波长求出的c最高为2.36×10~5(Dy)。利用加入竞争配位体(NaF,NaHCO_3),扩大了轻重稀土之间的差异性,提高了选择性,在轻稀土存在下测定了重稀土,得到了较好的结果。
Following the chromogenic reaction of chrome azurol S and bromine blue 6B as the reagent of the rare earth quaternary complex, this paper systematically studied the color reaction of rare earth-chromium cyanine R (ECR) -5-nitro-phenanthroline (5-N-Phen) - dodecylpyridinium bromide (DPB) system. The results show that the system also has high sensitivity. The molar absorption coefficient ()) of the quaternary complex is up to 1.85 × 10 ~ 5 (Lu), and the highest c is 2.36 × 10 ~ 5 ( Dy). By adding competitive ligands (NaF, NaHCO 3), the difference between light and heavy rare earths is enlarged and the selectivity is enhanced. The heavy rare earths are measured in the presence of light rare earths and good results are obtained.