高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (6): 749.

• 论文 • 上一篇    下一篇

催化反应-示波极谱测定痕量亚硝酸根——NO2--MR-BrO3-催化体系

蒋治良, 梁爱惠, 戴国忠   

  1. 广西师范大学化学系, 桂林, 541004
  • 收稿日期:1991-07-15 出版日期:1992-06-24 发布日期:1992-06-24
  • 通讯作者: 蒋治良
  • 基金资助:

    广西师范大学青年自然科学基金

Catalytic Reaction-Oscillopolarographic Method for the Determination of Trace Amounts of Nitrite——Studies on the Catalytic System of NO2--BrO3--Methyl Red

JIANG Zhi-liang, LIANG Ai-hui, DAI Guo-zhong   

  1. Department of Chemistry, Guangxi Normal University, Guilin 541004
  • Received:1991-07-15 Online:1992-06-24 Published:1992-06-24

PDF (PC)

摘要： 基于在0.016mol/LH2SO4中及加热条件下,NO2-对BrO3-氧化甲基红有强烈的催化作用,籍自来水冷却中止反应,以NaOH作示波极谱测量指示组分甲基红(Ep=-0.56V,vs.SCE)的支持电解质,建立了NO2-的第一个催化反应-示波极谱分析法。该法检出限为0.035ng/mL,测定范围为0.1～50ng/mL。

关键词: 亚硝酸盐, 甲基红, 催化法, 示波极谱法

Abstract: The present paper covers a novel and highly sensitive catalytic method for the determination of nitrite as low as 0.1 ng/mL, It is based on the fact that the nitrite ion catalyses the slow redox reaction between methyl red and BrO3- in 0.016 mol/L H2SO4 at 100℃.Cooling by tap water was chosen to quench the reaction.And oscillopolarography was used as detection technique for methyl red in NaOHmedium which exhibits a sensitive oscillopolarographic wave at -0.56 Vvs.SCE.Nitrite in water samples was analysed by this method with excellent results.

Key words: Nitrite, Methyl red, Catalytic method, Oscillopolarography

TrendMD: