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：《广东化工》2014年第10期63-64,共2页Guangdong Chemical Industry

摘　　要：文章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-0.51 V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× 10-3 g/L的标准溶液吸附,Pb2＋最大吸附量为0.299 mg/g,吸附率为99.94％.通过采用1.6 mol/L HNO3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.The article uses the anodic stripping valtammetry to measure the cadmium and the lead, and has studied the synthesis polyaniline which is combined by chemistry oxo-process as the absorbent, besides, it also studies the absorption and desorption condition of the synthesis polyaniline to heavy metal Pd^2＋. The research discovered that electric potential - 0.51 V separately produced the lead, the linearity range is 0.008-0.08 μg/L respectively, and picks out limits is 2.0×10^-9/L respectively. It adsorpted the standard solution ,whose preliminary test is1.0×10^-3 g/L while the biggest adsorptive capacity of Pb^2＋ is 0.299 mg/g, and the adsorption rate is 99.94 % by polyaniline. By adopting the desorption with 1.6 mol/L HNO3, the returns-ratio is 97 %, and the multiple for original 10 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：O65[理学—分析化学]