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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (8): 808-811. 上一篇    下一篇

研究论文

催化动力学分光光度法测定痕量锰(II)的研究: 钙红-过氧化氢体系

张振辉;刘锦云;熊   

  1. 江西大学化学系
  • 发布日期:1989-08-15

Studies on the catalytic-kinetic spectrophotometric determination of trace amounts manganese (II) Cal.Red-hydrogen peroxide system

ZHANG ZHENHUI;LIU JINYUN;XIONG   

  • Published:1989-08-15

PDF

601

被引次数

131

本文筛选出锰的新指示反应, 用钙红-过氧化氢体系作指示剂, 据此建立了一个有高灵敏度和选择性的催化动力学分析法, 并就反应动力学中反应速度方程, 反应级数,活化能, 共存离子等问题作了讨论。

关键词: 分光光度法, 钠化合物, 催化, 反应动力学, 锰, 头发, 萘 P, 痕量分析, 萘酚 P, 磺酸盐

A very sensitive catalytic spectrophotometric method for the determination of trace amts. of Mn(II) is reported. The determination is based on the decrease of the absorbances of the indicator reaction of Calred (CR) with H2O2 which is catalyzed by Mn(II) with heat in Clark-Lubs buffer solution (pH 9.8). The reaction is first-order in CR or Mn(II) and the apparent activation energy of the catalytic reaction is 115.31 kJ/mol. This method was applied to the determination of trace amts. Mn(II) in human hair and tap water. The coefficient variations are 4.95 and 5.63%, resp.

Key words: SPECTROPHOTOMETRY, SODIUM COMPOUNDS, CATALYSIS, REACTION KINETICS, MANGANESE, HUMAN HAIR, NAPHTHALENE P, TRACE ANALYSIS, NAPHTHALENOL P, SULFONATE

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