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阴离子表面活性剂参与形成的多元络合物显色反应的研究,目前尚不多;特别是对金属离子-三苯甲烷酸性染料配位络阴离子在一定条件下的增敏作用,一直未见报导。笔者在对资料研究基础上,进一步探讨了钇-铬天青S-邻菲绕啉-羟基(聚氧乙烯)_3磺酸钠多元络合物的显色反应,得到十分有意义的结果。在乙二胺及其同系物存在下,该体系在pH7.2—8.4范围内形成绿色络合物,最大吸收波长在645nm处,表观摩尔吸光系数达1.98×10~5,氧化钇含量在0—12微克/25毫升内符合比尔定律。利用轻重稀土络合物吸光度有较大差异的特性,进行了氧化
There are not many studies on the color reaction of the multi-complex formed by the anionic surfactants. However, it has not been reported that the sensitization of coordination anion of the metal ion-triphenylmethane acid dyes under certain conditions . On the basis of the data, the author further discussed the color reaction of yttrium-chromium azure S-phenanthroline-hydroxy (polyoxyethylene) _3 sodium sulfonate multivalent complex, and obtained very significant results. In the presence of ethylenediamine and its homologues, the system formed a green complex in the pH range of 7.2-8.4. The maximum absorption wavelength was at 645 nm with an apparent molar absorptivity of 1.98 × 10 ~ 5. The yttrium oxide content was Beer’s law is 0-12 μg / 25 ml. The use of light and heavy rare earth complexes have a larger absorbance characteristics of the oxidation