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化学学报
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化学学报 ›› 1982, Vol. 40 ›› Issue (5): 419-423. 上一篇    下一篇

论文

在溴化十六烷基三甲基铵存在下Bi(Ⅲ)与邻苯三酚红络合反应的研究

徐其亨, 许琇钧   

  1. 云南大学化学系, 昆明
  • 投稿日期:1981-01-22 发布日期:2013-06-03
  • 通讯作者: 徐其亨

THE INVESTIGATION OF COMPLEX FORMATION BETWEEN BISMUTH (Ⅲ) AND PYROGALLOL RED IN THE PRESENCE OF CETYLTRIMETHYLAMMONIUM BROMIDE

XU QI-HENG, XU XIU-JUN   

  1. Department of Chemistry, Yunnan University, Kunming
  • Received:1981-01-22 Published:2013-06-03

PDF

791

被引次数

9

本文报道在溴化十六烷基三甲基铵(CTAB)存在下,Bi(Ⅲ)与邻苯三酚红(PR)的络合反应.在pH2的KNO3-HNO3缓冲溶液中,Bi(Ⅲ)与PR和CTAB形成蓝色三元络合物,λmax615nm,ε2.O×104.用摩尔比法、连续变化法、斜率比法和Asmus直线法测得Bi:PR:CTAB=1:1:2,并推测其结构可能为[Bi(OH)PR(CTAB)2].计算得表观稳定常数为1.4×1015.还研究了测定矿石中微量铋的各种条件和测定方案,铋在O～300μg/50mL范围内符合比尔定律.用合成样和标准样进行了方法考验,结果良好.

The complex formation between Bi (Ⅲ) and pyrogallol red (PR) in the presence of cetyltrimethylammonium bromide (CTAB) has been studied. The blue ternary complex (λmax615 nm) has a composition of 1:1:2 (Bi:PR:CTAB) at pH 2.0±0.2. Beer's law is obeyed over the range 0~300 μg of Bi/50 mL. The molar absorptivity is 2.0×104L·mol-1·cm-1 at 615 nm. A tentative structure for the ternary complex is suggested. The apparent stability constant has been calculated to be 1.4·1015. A simple method is suggested for the determination of bismuth in ores.