阳离子型微乳液对铅-二溴羟基苯基 荧光酮增敏作用的研究

Study on Senstized Reaction of Cationic-Microemulsion on the Plumbum-2,3,7-Trihydrioxy-9 Dibromo-Hydroxyphenylftuorone

研究了在溴化十六烷基三甲铵／正戊醇／正庚烷／水组成的阳离子型微乳液介质中铅与二溴羟基苯基荧光酮（ＤＢＨ－ＰＦ）的显色。在 ＰＨ９．５ ＮＨ３－ＮＨ４Ｃl缓冲体系中， Ｐb2+与 ＤＢＨ－ＰＦ形成 １：２紫红色配合物，＝１．０１１０５Ｌ／mol／Ｃm， ｐb2+浓度在０－９ ｇ／２５ml范围内服从比尔定律／方法用于牙膏、人发以及粮食中铅的测定，结果令人满意。

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.