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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (6): 563-567. 上一篇    下一篇

研究论文

铕(或其他稀土)-二价金属离子-二甲酚橙配合物吸光度的加和性

刘承敏;王雅辉;迟锡增;梁树权   

  1. 北京师范大学;中国科学院化学研究所
  • 发布日期:1989-06-15

The additivity of the absorbances of Europium (or other Lanthanides)-Bivalent metal ions-xylenol orange

LIU CHENGMIN;WANG YAHUI;CHI XIZENG;LIANG SHUQUAN   

  • Published:1989-06-15

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566

被引次数

1

本文继Eu-Xo, Zn-Xo配合物加和性研究进而证实铕(或其他稀土), 二甲酚橙(Xo或H6L)和M^2^+-Xo(M^2^+=Mn, Co, Ni, Cu, Zn, Cd, Pb)混合液的吸光度加和性误差<±2%, 只有Cu-Xo的误差略大(<±2.5%), 用市售Xo, 误差也在此范围内。本文从配合物的键合和结构, 探讨产生加和性的依据。

关键词: 紫外分光光度法, 分子结构, 酸度, 二甲酚橙, 稀土金属络合物, 铕络合物, 吸光度减

The absorbance of a mixture of europium-xylenol orange (XO), or other members of lanthanides-XO, and the bivalent metal ions M2+-XO (M2+ = Mn, Co, Ni, Cu, Zn, Cd, and Pb) complexes in slightly acidic media (pH ~ 6) is equal to the sum of the individual absorbances measured alone, within ?, only Cu-XO shows greater deviation (within ?.5). With both purified and com. XO reagent, good additivity can be obtained. This may be due to similar visible change in the spectrum or sharp color change when the metal ions combine with phenolic oxygen of XO at 4

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, MOLECULAR STRUCTURE, ACIDITY, XYLENOL ORANGE, RARE EARTH METAL COMPLEX, EUROPIUM COMPLEX, ABSORBANCE SUBTRACTION

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