Nitrate enhanced electrochemiluminescence determination of tris (2,3-dibromopropyl) isocyanurate with a gold nanoparticles-modified gold electrode

作者：Zhao, Peng; Cao, Guangming; Zhou, Lifen; Liu, Qian; Guo, Manli; Huang, Yan; Cai, Qingyun^*; Yao, Shouzhuo

来源：Analyst, 2011, 136(9): 1952-1956.

DOI：10.1039/c1an15035a

Tris(2,3-dibromopropyl) isocyanurate (TBC) is a heterocyclic hexabrominated flame retardant, which cannot be degraded even over a long time and may be a potential environmental pollutant. In this paper, TBC is for the first time as far as we know determined by silver nitrate-enhanced electrochemiluminescence (ECL) using a gold nanoparticles (AuNPs)-modified gold electrode. In our experiments, TBC was found to have the characteristics of increasing the ECL intensity of Ru(bpy)(3)(2+), and the ECL signal was proportional to the concentration of TBC. Based on this, we have successfully developed a novel, fast and sensitive method for the analysis of TBC. The main influencing factors including the volume ratio of acetonitrile and water, and the concentration of Ru(bpy)(3)(2+) were investigated in detail. Compared with using a bare gold electrode in MeCN without AgNO(3), the limit of detection is remarkably lowered by 20 times and the linear range is expanded by 5 times by using the AuNPs-modified gold electrode and AgNO(3). Under the optimal conditions, a limit of detection of 5.0 x 10(-8) M (S/N = 3) is achieved with a linear range of 1.0 x 10(-7) to 5.0 x 10(-5) M. The mechanism of the ECL enhancement of the system is also investigated.

• 出版日期2011
• 单位湖南大学