高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (1): 27.

• 论文 • 上一篇    下一篇

用8－氨基喹啉高选择性分光光度法测定痕量锇的研究

李玲颖1, 桂明德1, 赵亚秋1, 张淑荣2   

  1. 1. 南开大学化学系, 天津, 300071;
    2. 天津核工业部理化工程研究所
  • 出版日期:1994-01-24 发布日期:1994-01-24

Studies on the Highly Sensitive and Selective Spectrophotometric Determination of Trace Osmium

LI Ling-Ying1, GUI Ming-De1, ZHAO Ya-Qiu1, ZHANG Shu-Roog2   

  1. 1. Department of Chemistry, Nankai University, Tianjin, 300071;
    2. Physics and Chemistry Engineering Research Institute of Ministry of Nuclear Industry, Tianjin
  • Online:1994-01-24 Published:1994-01-24

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摘要： 研究了用8-氨基喹啉在pH3.62的HAc-NaAc缓冲溶液中测定痕量Os(Ⅳ)的分光光度法。常见的非贵金属和贵金属离子不干扰测定,并且选择性较好。Os(Ⅳ)与8-氨基喹啉的组成比为1:3,表观摩尔吸光系数ε600=1.3×105L/mol·cm.在0～10μg/10mL范围内符合比耳定律。合成样品分析结果良好。

关键词: 8－氨基喹啉, 锇, 分光光度法

Abstract: A new sensitive colour reaction of Os(Ⅳ) with 8-amino quinoline has been studied.The complex has an absorption peak at 600 nm and the reagent exhibits maximum absorptivity in the ultraviolet region,so that they show a strong colour contrast.The apparent molar absorptivity was found to be 1.32×105L/mol,cm.Beer's law is obeyed in the range of 0-10 μg of Os (Ⅳ)per l0 mL.It was also found that the complex reaction can be completed in 15-20 min,at 80-90℃ and pH 3.62 kept in a HAc-NaAc buffer solution,The colour of solution is stable at least 24 h.The molar ratio of Os(Ⅳ) to 8-amino quinoline was establislied to be 1:3 by two methods, All other noble metals except Ru(Ⅳ) which gives a slight absorption at 600 nm do not give colour reaction with 8-amino quinoline,even so 20 times amount of Ru(Ⅳ) can be tolerated.All common base metals reacting with 8-amino quinoline give no absorption at 600 nm,This paper is considered superior in terms of simplicity,stability,sensitivity and selectivity.

Key words: Amino quinoline, Osmium, Spectrophotometry

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