摘要
将鲁米诺（luminol）和高锰酸根同时固定在阴离子交换树脂柱中，磷酸盐缓冲溶液既作为洗脱剂洗脱树脂中的离子，又作为碱性介质，引起KMnO4氧化Luminol产生化学发光，在铅的作用下在样品池中产生后续化学发光，建立了一种测定铅的流通式化学发光传感器。传感器的线性响应范围为5．0×10^-8～1．0×10^-5 g/mL，检出限为3×10^-8 g/mL（3σ）。整个分析过程可以在1min内完成。对2．0×10^-6 g/mL的样品进行9次平行测定，其相对标准偏差为3．2％。传感器在200h内可以重复使用300次。应用于汽油中铅（Ⅱ）的测定结果令人满意。
Chemiluminescence（CL） reagent luminol and permanganate were electrostatically immobilized on anion exchange resin separately, and a continuous flow sensor for the determination of lead ions combined with controlled-reagent-release technology in a FIA-CL-system was constructed. Lead ions were sensed by their enhancing effect on the follow-up CL reaction of luminol-KMnO4, which were eluted from the anion exchange column. The calibration curve was linear in the range of 5.0×10^-8 - 1.0×10^-5 g/mL, and the detection limit was 3×10^-8 g/mL for lead（3σ）. A complete analysis could be performed wthin 1 min with a relative standard deviation of 3.2% （2. 0×10^-6 g/mL, n =9）. The sensor showed remarkable stability and could be easily reused over 300 times during 200 h. The sensor has successfully been applied to the determination of lead in gasoline samples.
出处
《应用化学》
CAS
CSCD
北大核心
2008年第3期326-329,共4页
Chinese Journal of Applied Chemistry
基金
河南省自然科学基金项目(0511022300)
河南省教育厅自然科学基金项目(200410483002)
商丘师范学院中青年骨干教师项目资助
关键词
流动注射
化学发光传感器
铅
flow injection, chemiluminescence sensor,lead
