Electrochemiluminescence analysis of chromium(Ⅵ) based on PEI/SiO2 nanoparticles self-assemble modified electrode
WANG Yan1， ZHANG Jianhuai2， GUO Zhihui1*, ZHENG Xingwang 1
(1 School of Chemistry and Chemical Engineering, Shannxi Normal University, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Xi′an 710119, Shaanxi, China；2 The Middle School Affiliated to Northwest Polytechnical University，Xi′an 710072, Shaanxi, China）
Abstract:
PEI/SiO2 nanoparticles were synthesized by the reverse micromulsion method, and the particles were characterized by TEM and Zeta potential. By self-assembling of the as-prepared composite nanoparticles on the Nafion/CNT film coated grapite electrode, a functional modified electrode could be obtained. Based on the strong enrichment ability of the functional modified electrode to CrO2-4and strong enhancement of Cr (Ⅲ) to chemiluminescence signal of luminol-H2O2 system, a highly selective ECL method for detecting Cr (Ⅵ) was developed.
KeyWords:
PEI/SiO2 nanoparticles modified electrode; chromate (CrO2-4) detection; luminol; electrochemiluminescence (ECL)
