高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (12): 1237.

• 论文 • 上一篇    下一篇

双显色双波长分光光度法研究——铌和钽的高灵敏同时测定

史慧明, 李金和, 奚长生   

  1. 南开大学化学系
  • 收稿日期:1987-07-10 出版日期:1988-12-24 发布日期:1988-12-24
  • 通讯作者: 史慧明
  • 基金资助:

    国家自然科学基金

Studies on the Dual-system and Double-wavelength Spectrophotometry ——Simultaneous Determination of Nb and Ta

Shi Huiming, Li Jinhe, Xi Changsheng   

  1. Department of Chemistry, Nankai University, Tianjin
  • Received:1987-07-10 Online:1988-12-24 Published:1988-12-24

摘要: 本文选择SAF和5Br-PADAP两个显色体系构成显色体系对,建立双显色双波长分光光度法。可不经分离,同时高灵敏地测定铌和钽,应用在合金钢分析中获得满意的结果。

关键词: 双显色双波长分光光度法, 铌,

Abstract: Asensitive and selective method for the simultaneous determination of Nb and Ta in alloy steel, which is based on the basic principle of the dual-system and double-wavelength spectrophotometry, has been developed. SAPand 5Br-PADAP were chosen for constructing "the pair of coloured system", and Nb and Ta were quantified by the formulas: △ANb =A5Br-PADAP,604 - 0.28ASAF,513 △ATa=ASAF,513 -A5Br-PADAP,615 respectively. The present method has a high sensitivity (△εTa = 1.35 ×105, △εNb =1.33×105), and most of common ions do not disturb the determination of Nb and Ta.

Key words: Dual-system and Double-wavelength Spectrophotometry, Niobium, Tantalum

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