Abstract: The senstized reaction of cationic-microemulsion CTMAB-n-C5H11.OH-n-C7H16-H2O as a medium on the Plumbum2.3.7-trihydroxy-q-dibromo-hydroxyphenylftuorone(DBH-PF) complex was studied.In the medium of NH,-NH.CI (pHg.5 ) plumbum reacts with DBH-PF and forms a 1 :2 complex The maximum absorption is at 570 nm and the molar absorptivity is 1 .01 x 1 05L/mol/cm. Beer’s law is obeyed in the range of0-9 g/L for pb2+.The method has been applied to the determination of plumbum in the toothpaste. hair and food with satisfactory results.

Key words: Plumbum Microemulsion 2, 3.7-trihydroxy-9-dibromo-hydroxyphenylftuorone Determination