N-(1-萘基)-乙二胺荧光光度法测定痕量亚硝酸根  

Highly Sensitive Spectrofluorimetric Determination of Trace Amounts of Nitrite with N-(1-Naphthyl) Ethylenediamine

作　　者：周运友[1] 佘世科[1] 卢琴[1] 朱昌青[1] 王伦[1] 

机构地区：[1]安徽师范大学化学与材料科学学院,安徽芜湖241000

出　　处：《光谱学与光谱分析》2005年第8期1318-1321,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(20375001)资助项目

摘　　要：研究了盐酸介质中N-(1-萘基)-乙二胺(NED)与亚硝酸根的反应. 基于NED的荧光强度被亚硝酸根猝灭的现象, 建立了一种荧光测定NO-2的新方法, 并对反应机理进行了讨论. 在优化实验条件下, NO-2在1.07～214.0 μg·L-1范围内与NED的荧光猝灭强度呈线性关系, 方法的检出限为0.069 μg·L-1. 该法用于测定水样中痕量亚硝酸根的含量, 结果令人满意.A simple and sensitive fluorescence quenching method for the determination of trace nitrite was developed. The method is based on the reaction of NED with nitrite in acidic medium to form a new compound, which has weak fluorescence. The linear range was 1.07-214.0 μg·L^-1 with a 3σ detection limit of 0.069 μg· L^-1 under the optimum experimental conditions. This proposed method has been applied to the determination of trace amounts of NO2^- in tap water and lake water without extraction.

关 键 词：N-(1-萘基)-乙二胺 亚硝酸根 荧光猝灭 

分 类 号：O657.3[理学—分析化学]