作　　者： ; ; ; ;

机构地区： 商丘师范学院化学化工学院

出　　处： 《应用化学》 2008年第3期326-329,共4页

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.

关 键 词： 流动注射 化学发光传感器 铅

领　　域： [理学] [理学]