β-CD存在下TPPS_4测定岩矿中痕量铅的分光光度研究  

Spectrophotometric Determination of Lead in Rocks and Minerals with TPPS_4 in the Presence of β-CD

作　　者：朱利中[1] 何晓峰[1] 戚文彬[1] 

机构地区：[1]杭州大学化学系

出　　处：《岩矿测试》1990年第1期22-24,共3页Rock and Mineral Analysis

基　　金：国家自然科学基金资助;浙江省自然科学基金资助课题

摘　　要：pH9.8—11.2条件下,β-环糊精(β-CD)对Pb^(2+)-TPPS_4-Phen显色反应有一定的增敏作用,显色体系的表观摩尔吸光系数为2.81×10~5l·mol^(-1)·cm^(-1),铅量在0—30μg/50ml范围内符合比尔定律。拟订了分光光度测定岩矿中痕量铅的新方法。The reaction of Pb^(2+)-TPPS_4-Phen in the presence of β-cyclodextrin at pH 9.8-11.2 has been investigated in detail. The wavelength of maximum absor-bance for the complex is 464nm. The molar absorptivity is 2.81 × 105l·mol^-11· cm-1. Beer's law is obyed up to 0.6μg/ml Pb2+ concentration. A new sensitive and selective method for determining lead in rocks and minerals is presented.

关 键 词：矿物 铅 分光光度 岩石 TPPS4 

分 类 号：P575.3[天文地球—矿物学]