首页 | 本学科首页   官方微博 | 高级检索  
     


Development of polyaniline microarray electrodes for cadmium analysis
Authors:Marta Oliveira  Subramanian Viswanathan  Simone Morais  Cristina Delerue-Matos
Affiliation:1. Requimte, Instituto Superior de Engenharia do Porto, Rua Dr. Ant??nio Bernardino de Almeida 431, 4200-072, Porto, Portugal
Abstract:Disposable screen-printed electrodes (SPCE) were modified using a cosmetic product to partially block the electrode surface in order to obtain a microelectrode array. The microarrays formed were electropolymerized with aniline. Scanning electron microscopy was used to evaluate the modified and polymerized electrode surface. Electrochemical characteristics of the constructed sensor for cadmium analysis were evaluated by cyclic and square-wave voltammetry. Optimized stripping procedure in which the preconcentration of cadmium was achieved by depositing at ?1.20 V (vs. Ag/AgCl) resulted in a well defined anodic peak at approximately ?0.7 V at pH 4.6. The achieved limit of detection was 4 × 10?9 mol dm?3. Spray modified and polymerized microarray electrodes were successfully applied to quantify cadmium in fish sample digests.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号