高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (6): 581.

• 研究论文 • 上一篇    下一篇

溴代二甲氨基苯基荧光酮的合成及其与铁显色反应的研究

杨代菱1, 余席茂1, 余晓梅2   

  1. 1. 武汉大学化学系;
    2. 江苏省商品检验局
  • 收稿日期:1987-07-14 出版日期:1989-06-24 发布日期:1989-06-24
  • 通讯作者: 杨代菱

Studies on the Synthesis of Bromodimethylaminoaniline-fluorone and Its Colour Reaction with Iron

Yang Bailing1, Yu Ximao1, Yu Xiaomei2   

  1. 1. Department of Chemistry, Wuhan University, Wuhan;
    2. Examination Bureau of Commodities, Jiangsu Province
  • Received:1987-07-14 Online:1989-06-24 Published:1989-06-24

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被引次数

16

摘要： 报道了溴代二甲氨基苯基荧光酮(简称BDMAF)的合成及鉴定;研究了在第二配体及表面活性剂存在下,BDMAF与微量铁的显色反应。在乙酰丙酮及CTMAB存在下,铁与显色剂形成蓝色配合物,其表观摩尔吸光系数达1.61×105L/mol·cm。以EGTA作为掩蔽剂可不经分离直接测定某些纯金属及合金中的微量铁。

关键词: 溴代二甲氨基苯基荧光酮, 铁, 乙酰丙酮, 溴代十六烷基三甲铵

Abstract: Ahighly sensitive colour reagent bromodimethylaminoaniline-fluorone (BDMAF) was synthesized and identified. The colour reaction of BDMAFwith iron in the presence of auxiliary complexing ligands and surfactants was studied systematically. The blue quaternary complex of Fe-acetylacetone-BDMAF-CTMABexhibits absorption maximum at 608 nm with an apparent molar absorptivity of 1 .6 × 105 L.mol-1 .cm-1 in the medium of NH3-NH4C1 buffer of pH 9.5～10.5. Its apparent stability constant is 6.8×1012. Beer's law is obeyed for iron of 0～5.5 mg/25 L. The composition of this complex was found to be Fe( Ⅲ):BDMAF = 1:2. The method has a high selectivity in the presence of 'EGTA, it has been applied to the determination of trace amounts of Fe3+ in zinc alloys without separation. The variation coefficients are 3.2%～3.9% for the four standard samples of zinc alloys measured (7 times).

Key words: Bromodimethylaminoaniline-fluorone, Iron, Acetylacetone, Cetyltri- methylammonium bromide

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