伏安法对聚苯胺溶液中铅的检测与分析  

Polyaniline Solution for Detection and Analysis of Lead in Voltammetry

作　　者：刘勇[1] 

机构地区：[1]贵州工业职业技术学院化学与材料工程学院,贵州贵阳550008

出　　处：《贵州工业职业技术学院学报》2014年第3期15-17,56,共4页GUIZHOU SCIENCE AND TECHNOLOGY PROFESSIONAL COLLEGE

摘　　要：本文利用化学氧化法合成的聚苯胺作为吸附剂，研究了伏安法测定痕量经聚苯胺吸附后溶液中的铅离子。研究发现：在电位－0．51V能产生铅的灵敏溶出峰，线性范围分别为0．008-0．08μg／L，检出限分别为2．0×10^-9g／L。利用聚苯胺，对初始浓度为1．0×10^-3g／L的标准溶液吸附，Pb^2＋最大吸附量为0．299mg／g，吸附率为99．94％。通过采用1．6mol／LHNO3解吸，得到回收率为97％，富集倍数为10倍。可用于水中痕量铅的富集与测定，结果满意。In this paper, polyaniline combined by chemistry oxo -process is used as absorbent; it studies voltammetry to measure the lead in solution which is absorbed by rahammetry. The research discovered that electric potential - 0.51V separately produced the sensitive stripping peak of lead; the linearity range is 0.008 -0.08 g/L respectively; and the picking out limit is 2.0 × 10^-9g/L respectively. It adsorpted the standard solution, whose preliminary test isl. 0×10^-3 g/L while the biggest adsorptive capacity of Pb^2＋ is 0.299mg/g, and the adsorption rate is 99.94% by polyaniline. By adopting the desorption with 1.6mol/L HNO3, the returns - ratio is 97%, and the multiple for original 10 is times. The result is satisfied, because they can concentrate and measure the cadmium and lead.

关 键 词：溶出伏安法 聚苯胺 吸附 解吸 

分 类 号：TQ062[化学工程]