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新Ｓｃｈｉｆｆｓ试剂糠醛缩７－氨基－８－羟基喹啉－５－磺酸（简称Ｆ７Ｎ８Ｑ５Ｓ）在碱性条件下不稳定，缓慢分解，Ｍｎ（Ⅱ）对该反应具有强烈的催化作用，生成强荧光物质，由此建立了催化荧光测定痕量锰的新方法。实验表明，体系在λex／λem=３２２／３８２（ｎｍ）处，最佳的实验条件为：２５ｍＬ总体积中，有０．０３％Ｆ７Ｎ８Ｑ５Ｓ ３．０ ｍＬ；ｐＨ １０．４的ＮＨ４Ｃｌ／ＮＨ３·Ｈ２Ｏ缓冲溶液 ５．０ｍＬ，反应温度 １００℃；反应时间 ２５ ｍｉｎ。Ｍｎ（Ⅱ）含量在 ０～６０．０ μｇ／Ｌ范围内有良好的线性；检测下限为２．６μｇ／Ｌ。本方法用于实际样品的测定，结果满意。本文还探讨了动力学方程及反应机理。
The new Schiffs reagent furfural 7-amino-8-hydroxyquinoline-5-sulfonic acid (F7N8Q5S) is unstable under alkaline conditions and decomposes slowly. Mn (Ⅱ) strongly catalyzes the reaction and produces strong fluorescence Thus, a new method for the determination of trace manganese by catalytic fluorimetry was established. The experimental results show that the best experimental conditions are: λex / λem = 322/382 (nm), the best experimental conditions are as follows: 3.0 mL of F7N8Q5S 3.0 mL in the total volume of 25 mL; NH4Cl / NH3 · H2O Buffer solution 5.0mL, reaction temperature 100 ℃; reaction time 25 min. The content of Mn (Ⅱ) in the range of 0-60.0 μg / L had a good linearity with the detection limit of 2.6 μg / L. The method is applied to the determination of actual samples with satisfactory results. This article also discusses the kinetic equation and reaction mechanism.