正交设计—TPPS_4分光光度法测定微量铅的研究  

DETERMINATION OF TRACE-AMOUNTS OF LEAD BY ORTHOGONAL DESIGN-SPECTROPHOTOMETRY

作　　者：侯旭[1] 李方[1] 汪必琴[2] 

机构地区：[1]四川大学化学学院,四川成都610064 [2]四川师范大学化学与生命科学学院,四川成都610066

出　　处：《化学研究与应用》2001年第2期184-186,共3页Chemical Research and Application

摘　　要：Orthogonal design methocl,based on the formation of a yellow complex of lead(Ⅱ) with α、β、γ、δ Trtra(p sulfopheny 1) Porphine in the pH10.2 H 3BO 3 NaOH buffer selution,has been proposed.The maximum absorption wavelength (λ max ) is 464nm.The molar absorption coefficient(ε max ) is 2.5×10 5L·mol -1 ·cm -1 .The detection limit is 4μg·L -1 .Beer’s law is applicable in the rang of 0.1～10.4μg/25ml for lead.The method has been used for determination of trace lead in synthetic sample with satisfactory result.Orthogonal design methocl,based on the formation of a yellow complex of lead(Ⅱ) with α、β、γ、δ Trtra(p sulfopheny 1) Porphine in the pH10.2 H 3BO 3 NaOH buffer selution,has been proposed.The maximum absorption wavelength (λ max ) is 464nm.The molar absorption coefficient(ε max ) is 2.5×10 5L·mol -1 ·cm -1 .The detection limit is 4μg·L -1 .Beer's law is applicable in the rang of 0.1～10.4μg/25ml for lead.The method has been used for determination of trace lead in synthetic sample with satisfactory result.

关 键 词：正交设计法 分光光度法 铅 微量分析 meso-四(4-磺酸苯基)叶啉 显色剂 

分 类 号：O614.433[理学—无机化学] O657.32[理学—化学]