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研究了在阳离子型微乳液：CTMAB／n－C5H11OH-n－C7H16／H2O介质中，Pb（Ⅱ）－5’-硝基水杨基荧光酮（5’－NSF）的显色反应。在oH9．0NH3·H2O-NH4Cl缓冲体系中，Pb（Ⅱ）与5’－NSF形成1：2紫色络合物，ε575=1．14×105L·mol－1·cm－1，Pb（Ⅱ）浓度在0－0．52mg／L范围内服从比尔定律。方法用于样品中微量铅的测定，结果令人满意。
The color reaction of Pb (Ⅱ) -5’-nitro salicylfluorone (5’-NSF) in cationic microemulsion: CTMAB / n-C5H11OH-n-C7H16 / In the buffer system oH9.0NH3 · H2O-NH4Cl, Pb (Ⅱ) forms a 1: 2 purple complex with 5’-NSF and ε575 = 1.14 × 105L · mol- Beer’s law was obeyed at concentrations ranging from 0 to 0.52 mg / L. The method is applied to the determination of trace lead in samples with satisfactory results.