【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NO2-的新方法,并对反应机理进行了讨论。在优化实验条件下,NO2-在1.07~214.0μg.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0.069μg.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。更多还原

【Abstract】 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 NO^-₂ in tap water and lake water without extraction.更多还原