流动注射化学发光法测定水体中联苯胺  

FI-chemiluminescence determination of benzidine in surface water

作　　者：余萍[1] 王迁[1] 高凤[1] 黄希[1] 

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159

出　　处：《分析试验室》2014年第1期113-115,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了水体中联苯胺的化学发光行为，结合流动注射-化学发光分析方法，建立了用酸性KMnO。一甲醛一罗丹明B体系测定水体中联苯胺的方法。在酸性条件下，KMn04与甲醛氧化联苯胺产生化学发光，加入罗丹明B后有增敏作用，化学发光强度随联苯胺浓度的增大而增强，由此建立亍测定联苯胺的流动注射化学发光法。在优化的实验条件下，化学发光强度与联苯胺的浓度呈线性相关，方法的线性范围为5～1000μg／L，检出限（3S／N）为4．16μg/L，对50μg／L联苯胺溶液进行11次平行测定，相对标准偏差（RSD）为1．5％。方j去用于测定水中联苯胺含量的测定，回收率在97．5％～104．0％之间。This paper studied the chemiluminescence behavior of benzidine in water with flow injection-chemilu- minescence analysis method and a new method of acidic potassium permanganate - formaldehyde - rhodamine B system for the determination of benzidine in water has been proposed. Based on the fact that rhodamine B chlo- ride can remarkably enhance the chemiluminescence of the KMnO4 - HCHO - benzidine system in acidic media, a method of FI-CL determination of benzidine was proposed. The chemiluminescence intensity was found to increase with the concentration of benzidine. Various factors influenced the CL system were studied carefully. Linear relationship between the CL intensity and mass concentration of benzidine was obtained in the range of 5 ~ 1000 μg/L and the detection limit （3S/N） was 4. 16 μg/L. The relative standard deviation （n = 11 ） was 1.5%. for determination of 50 μg/L benzidine. The proposed method has been applied successfully to the deter- mination of benzidine in surface water, and recoveries were in the range of 98.0% - 104. 3%.

关 键 词：流动注射 化学发光 联苯胺 

分 类 号：O657.3[理学—分析化学]