中华医学超声杂志

应用化学 ›› 1990, Vol. 0 ›› Issue (1): 49-52.

• 研究论文 • 上一篇    下一篇

分光光度法测定混合稀土中的重稀土

王乃兴1, 亓平2   

  1. 1. 山东大学应用化学系 济南 250100;
    2. 山东省测试中心 济南
  • 收稿日期:1989-04-28 修回日期:1989-07-07 出版日期:1990-02-10 发布日期:1990-02-10

SPECTROPHOTOMETRIC DETERIMNATION OF YTTRIUM SUBGROUP QF RARE EARTHS

Wang Naixing1, Qi Ping2   

  1. 1. Department of Applied Chemistry, Shangdong University, Jinan 250100;
    2. Shangdong Provincial Experimantal Centre, Jinan
  • Received:1989-04-28 Revised:1989-07-07 Published:1990-02-10 Online:1990-02-10

PDF

461

被引次数

6 | 1

摘要： 在HAc-NaAc缓冲溶液中,重稀土可与7-碘-8-羟基喹啉-5-磺酸及溴化十六烷基三甲铵形成稳定的三元配合物。配合物的最大吸收波长λmax=385nm,摩尔吸光系数为1.5×104L·mol-1·cm-1。含钇配合物的组成比为Y:Ferron:CTMAB=1:6:9,钇浓度在0—44μg/10mL符合比耳定律。 用以分析合成试样中的钇及钇组稀土,结果满意。

关键词: 钇组稀土, 分光光度法, 碘代羟喹啉磺酸

Abstract: Heavy rare earths can form a stable ternary complex with cetyltrimethylammonium bro-mide(CTMAB)and Ferron(7-iodo-8-hydroxyquinoline-5-sulfonic acid)in molar ratioof Y:Ferron:CTMAB=1:6:9 for yttrium. The maximum absorption wavelength of the Yternary complex was at 385nm at pH 3.2-3.8 of acetic acid-sodium acetate buffer.The apparent molar absorption coefficient was 1.5×104 L·mol·cm-1. The absorbance was linear tothe concentration of yttrium below 44μg/10mL. A method has been developed for the rapidand selective microdetermination of yttrium subgroup in mixed rare earths, using NaF asa masking agent.

Key words: Yttrium subgroup rare earth, spectrophotometry, ferron, quarternary ammonium bromide

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