期刊
ANALYST
卷 140, 期 12, 页码 3996-4000出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5an00292c
关键词
-
资金
- National Natural Science Foundation of China [21175126, 21475123]
Most electrochemiluminescence (ECL) systems require high concentrations of quencher to totally quench ECL. In this study, we found that ozone can quench tris(2,2'-bipyridyl)ruthenium(II) ECL using formaldehyde, methylglyoxal, or glyoxalate as co-reactants at a glassy carbon electrode with remarkable efficiencies even when the concentration of ozone is merely 0.25% of that of the co-reactant. The strongest quenching is observed with the tris(2,2'-bipyridyl)ruthenium(II)/formaldehyde ECL system. The tris(2,2'-bipyridyl)ruthenium(II)/formaldehyde ECL intensities decrease linearly with the ozone concentration over the range of 0.025-25 mu M (r = 0.9947) with a limit of detection of 8 nM. The method is more sensitive and faster than most methods. It shows high selectivity in the presence of other ROS or oxidants and some metal ions, such as H2O2, ClO-, Mg2+, Ni2+, etc. The method exhibits high recoveries for the detection of ozone in a ventilated photocopy room.
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