高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (2): 180.

• 论文 • 上一篇    下一篇

标准加入双波长光度法用于锰的选择测定

林辉概, 李梦龙, 石乐明, 李志良, 俞汝勤   

  1. 湖南大学化学化工系, 410082
  • 收稿日期:1989-01-17 出版日期:1991-02-24 发布日期:1991-02-24
  • 通讯作者: 李志良
  • 基金资助:

    国家自然科学基金

Standard Addition Dual Wavelength Spectrophotometry Used for Selective Determination of Manganese

Lin Hui-gai, Li Meng-long, Shi Learning, Li Zhi-laing, Yu Ru-qin   

  1. Department of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082
  • Received:1989-01-17 Online:1991-02-24 Published:1991-02-24

摘要: 提高灵敏度与改善选择性一直是光度分析研究的重要课题。为此近年提出了许多方法。但部分改善选择性的方法如双波长及三波长法等往往导致灵敏度下降。本文基于等吸收双波长法原理及标准加入法的特点,设计了标准加入双波长分光光度法,可消除干扰、改善选择性且不致降低灵敏度。方法用于5-Br-PADAP/TritonX-100显色体系选择测定锰可消除锌的干扰。

关键词: 标准加入双波长法, 5-Br-PADAP/Triton X-100显色反应, 锰, 锌, 选择测定

Abstract: The two-model standard addtion method was developed for the improvement of selectivity of spectrophotometry. Based on the combination of dual wavelength spectrophotometry and standard addtion method, the standard addtion-dual wavelength spectrophotometry was designed to estimate the concentration of analyte and to eliminate the interference of coexisting species, which could remedy some defects for the two original methods. The proposed method was applied to the determination of manganese(Ⅱ) in the presence of zinc(Ⅱ), with no separation, using the 5-Br-PADAP/triton X-100 chelating system.

Key words: Standard addtion-dual wavelength spectrophotometry, 5-Br-PADAP/triton X-100 system, Manganese, Zinc, Selective determination

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