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The influence of temperature on the ECL behavior of the benzhexol hydrochloride -Ru(bpy)32+ system ongraphite electrode

Cheng Hao, Jiang Shaotong, Yanqing Li

The influence of temperature on the electrochemiluminescence (ECL) behavior of the benzhexol hydrochloride -Ru(bpy)3 2+ system was studied by means of electrochemistry, chemiluminescence and fluorescence on graphite electrode. The results showed that the temperature has a significant impact on the ECL behavior of the benzhexol hydrochloride - Ru(bpy)3 2+ system from 0ô€”¨ to 70ô€”¨, the current intensity was enhanced with the increase of temperature, and the chemiluminescence intensity of the benzhexol hydrochloride-Ru(bpy)3 2+ system increased from 0ô€”¨ to 30ô€”¨ and then decreased. Under the optimum conditions, the linear range for benzhexol hydrochloride from 1×10-8-1×10- 4mol•L-1 and the detection limit (S/N=3) of 6.0×10-9 mol•L-1 were obtained, and the satisfactory reproducibility, relative errors and recoveries were gained. These results indicated that the testing temperature had an significant influence on the ECL behavior of the Ru(bpy)3 2+ system.