The enhanced electrogenerated chemiluminescence of Ru(bpy)3(2+) by glutathione on a glassy carbon electrode modified with some porphine compounds.
It has been found that the electrochemical activity of glutathione was increased greatly at the glassy carbon electrodes modified with 5,10,15,20-tetraphenylporphine ruthenium(II) carbenyl (RuTPP), meso-tetraphenylporphine copper(II) complex (CuTTP) and hemin. It has been also found that glutathione would enhance the electrogenerated chemiluminescence (ECL) of Ru(bpy)3(2+) at a hemin glassy carbon electrode; the enhanced ECL intensity was linear with the concentration of glutathione in the range of 1 x 10(-7)-1 x 10(-4) mol l-1, based on which method for determination of glutathione has been developed. The detection limit of glutathione was 2 x 10(-8) mol l-1, and the relative standard deviation for 1 x 10(-6) mol l-1 glutathione was 2.7%. The mechanism for this ECL system has been proposed.
Nana
C G
CG
Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China. gnchen@fzu.edu.cn
Jian
W
W
Xi
C
C
Pinga
D J
DJ
Feng
Z Z
ZZ
Qing
C H
CH
D004566:Electrodes; D005978:Glutathione / Q000032:analysis*; D006801:Humans; D008163:Luminescent Measurements
D005978:Glutathione