β－环糊精对Pb（Ⅱ）－四（－3溴－4－磺酸基苯基）卟啉显色反应增敏作用的研究

^Sensitizing Effect of β-Cyclodextrin on the Reaction of Lead(Ⅱ) With Meso-Tetra (3-Bromo-4-Sulfonicphenyl) Porphyrin

本文研究了β－环糊槽（β－ＣＤ）对Ｐｂ（Ⅱ）－四（－３溴－４－磺酸基苯基）卟啉（ｍ－Ｂｒ－ＴｐｐＳ４）显色体系的增敏作用，提出了高灵敏度测定痕量铅的分光光度新方法。显色体系的表观摩尔吸光系数为２．５×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。铅在０－１０μｇ／２５ｍＬ范围内符合比耳定律。稳定性好，操作简便，快速。本方法适用于人发和白酒等试样中铅的测定。回收率在９４％－１０３％。

A reaction of lead(Ⅱ) with meso-tetra(3-bromo-4-sulfonicphenyl) porphyrin(m-Br-TPPS4) was stndied by spectrophotometry.β-cyclodextrin has a great sensitizing effect on the color system.The molar absorptivity is 2. 5×105L·mol-1·cm-1 at 465nm.Beer's law is obeyed for lend(Ⅱ) in the range of 0-10μg/25mL.This method has been applied to determinelead(Ⅱ) in human hair and aicohois.