【摘要】 合成了荧光试剂水杨醛缩邻氨基苯酚,在NH4Cl-NH3·H2O缓冲溶液介质中,铅离子能使其荧光强度增强,荧光增强的程度随铅离子含量的增加而增大。据此建立了测定痕量铅离子的直接荧光分析方法。并研究此试剂与铅荧光反应的最佳条件,在λex/λem=386/502nm处,铅离子含量在0.0—200.0μg·L-1范围内与ΔF呈良好的线性关系,方法的检出限为1.62μg·L-1。该方法操作简便快速,具有极高的灵敏度。用于蓄电池废水中铅含量的测定,结果与火焰原子吸收光谱法基本一致,效果令人满意。更多还原

【Abstract】 Fluorescence reagent Salicylaldehyde-o-Aminophenol was synthesized.In the buffer solution medium of ammonium chloride and ammonia, fluorescent intensity Salicylaldehyde-o-Aminophenol was enhanced by lead ion.A direct fluorescence analytical method was proposed to determine the trace lead ion based on the increase of fluorescent intensity with the increase of concentration of lead ion.On optimal conditions,λ_ ex /λ_ em =386/502nm,the detection limit is 1.62μg/L and the linear range of determination is 0.00—200.0μg/L.The method is simple and highly sensitive,and was applied to the determination of lead (Ⅱ) in the waste water of storage battery. The results are in agreement with those by atomic absorption spectrometry.更多还原