| NO2-对乳酸-丙酮-BrO3--Mn2+-H2SO4化学振荡反应的影响 |
| Influence of NO2- on Lactic Acid-Actone-BrO3--Mn2+-H2SO4 Chemical Oscillation Reaction |
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| 摘要: 研究NO2-对乳酸-丙酮-BrO3--Mn2+-H2SO4化学振荡反应的影响时发现,NO2-对振荡反应的诱导期tin、周期tp有显著的影响。NO2-的浓度CNO2-与诱导期倒数的对数ln(1/tin)、NO2-浓度的对数lnCNO2-与周期的对数lntp均有良好的线性关系,线性范围为7.46×10-5～2.99×10-3mol·L-1。在此浓度范围内,NO3-无影响,是一重现性好,灵敏度高,操作简单的NO2-动力学分析测试体系。获得诱导期、周期的表观活化参数Ein、Ep分别为56.82kJ·mol-1、64.51kJ·mol-1。结合被动采样法,测得室外大气中NO2日平均浓度值为1.59×10-9mol·L-1,最后对NO2-共存时的振荡反应诱导期机理进行了初步探讨。 |
| 关键词: 亚硝酸根 化学振荡反应 机理 |
| 基金项目: |
| Abstract: The influence of NO2- on CH3CHOHCOOH-CH3COCH3-BrO3--Mn2+- H2SO4 chemical oscillation reaction has been studied. ln(1/tin) has good linear relationship with CNO2-, so does lntp with lnCNO2-, the linear range is 7.46×10-5～2.99×10-3mol·L-1.Within the range, NO3- has no influence. Therefore it’s a dynamic analytic measure system with good reappearance, high sensitivity and simple operating condition. The apparent activation parameter of inductory phase(Ein) and oscillatory period(Ep) are obtained, Ein=56.82kJ·mol-1, Ep=64.51kJ·mol-1. By the passive sampling method, the average concentration of NO2 outdoor is measured(CNO2-=1.59×10-9mol·L-1). Also the possible mechanism of the oscillatory reaction with existing NO2- has been discussed. |
| Keywords: nitrite chemical oscillation reaction mechanism |
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| 杨波,安从俊,郑丹,丁宗洲.NO2-对乳酸-丙酮-BrO3--Mn2+-H2SO4化学振荡反应的影响[J].无机化学学报,2002,18(9):874-878. |
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