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合成了新荧光试剂 2 ,3,4 三羟基苯乙酮缩 2 羧基苯胺 (TAFA)。详细研究了试剂与铜的荧光反应新体系的最佳适宜条件。在 pH 9.0的乙醇 /水 (3.5∶6 .5 ,V/V)溶液中 ,该试剂与铜离子形成稳定的络合物 ,组成比为 1∶1(金属∶试剂 ) ,λex/em=4 2 2 .4 / 5 6 1.6nm。所建立的铜的荧光分析方法的线性范围为 0 .5～ 12 0 .0μg/L ;检出限为 0 .2 6 μg/L。方法成功地应用于矿泉水和水中痕量铜的测定。
A new fluorescent reagent 2, 3,4-trihydroxyphenylacetophenone 2-carboxyanilide (TAFA) was synthesized. The optimal conditions for the new system of reagents and copper fluorescence were studied in detail. This reagent forms a stable complex with copper ions in a solution of ethanol / water (3.5: 6.5, V / V) at pH 9.0 with a compositional ratio of 1: 1 (metal: reagent), λex / em = 4 2 2 .4 / 5 6 1.6 nm. The established method of fluorescence analysis of copper has a linear range of 0.5 ~ 120 μg / L and a detection limit of 0.226 μg / L. The method was successfully applied to the determination of trace copper in mineral water and water.