The relation of the electrochemiluminescence(ECL) intensity with the shape of perforated and imperforated platinum electrodes has been investigated. ICCD(Intensified charge coupled device) was used to get the images o...The relation of the electrochemiluminescence(ECL) intensity with the shape of perforated and imperforated platinum electrodes has been investigated. ICCD(Intensified charge coupled device) was used to get the images of ECL of Ru(bpy) 3 Cl 2 ·6H 2 O and tripropylamine(TPA) on the electrodes. The results showed that the ECL was concentrated on the edge of the electrode. For the perforated platinum electrode, the ECL intensity was found to be dependent both on the electrode edge and the edge of the holes on the disk electrode. The ECL intensity of Ru(bpy) 3 Cl 2 ·6H 2 O measured on the four hole disk electrode was double higher than that measured on the simple disk electrode and the detection limit was increased approximately by three orders of magnitude from 1 fmol/L to 1 amol/L.展开更多
Ru（bpy）3^2＋ electrochemiluminescence （ECL） was applied to determination of rutin. ECL intensity of Ru（bpy）3^2＋ could be enhanced in the presence of rufin in basic solution on platinum electrode. At pH 9.9, lig...Ru（bpy）3^2＋ electrochemiluminescence （ECL） was applied to determination of rutin. ECL intensity of Ru（bpy）3^2＋ could be enhanced in the presence of rufin in basic solution on platinum electrode. At pH 9.9, light emission intensity was found to be linear with rutin in the range of 1-50μmol/L.展开更多
The unique cathodic electrochemiluminescence（ECL） emission of Ru（bpy）3^2＋（bpy=2,2′-bipyridine） was observed via Nation film at Au electrode[Au/Nafion/Ru（bpy）3^2＋] at about 0.20 V（vs. Ag/AgCl） and applied ...The unique cathodic electrochemiluminescence（ECL） emission of Ru（bpy）3^2＋（bpy=2,2′-bipyridine） was observed via Nation film at Au electrode[Au/Nafion/Ru（bpy）3^2＋] at about 0.20 V（vs. Ag/AgCl） and applied to the determination of several amino acids without prior derivatization with high sensitivity. The cathodic electrochemiluminescence（ECL） exhibits the detection limits and linear ranges of several amino acids comparable to or better than those of capillary electrophoresis with conventional ECL detection method（at 1.10-1.20 V vs. Ag/AgCl） based on precolumn derivatization. The results suggest that the cathodic ECL is promising for the detection of amino acids in bioanalysis.展开更多
文摘The relation of the electrochemiluminescence(ECL) intensity with the shape of perforated and imperforated platinum electrodes has been investigated. ICCD(Intensified charge coupled device) was used to get the images of ECL of Ru(bpy) 3 Cl 2 ·6H 2 O and tripropylamine(TPA) on the electrodes. The results showed that the ECL was concentrated on the edge of the electrode. For the perforated platinum electrode, the ECL intensity was found to be dependent both on the electrode edge and the edge of the holes on the disk electrode. The ECL intensity of Ru(bpy) 3 Cl 2 ·6H 2 O measured on the four hole disk electrode was double higher than that measured on the simple disk electrode and the detection limit was increased approximately by three orders of magnitude from 1 fmol/L to 1 amol/L.
基金This work was supported by the National Natural Science Foundation of China （No. 20475004）；Instrumental Analysis Fund of Peking University.
文摘Ru（bpy）3^2＋ electrochemiluminescence （ECL） was applied to determination of rutin. ECL intensity of Ru（bpy）3^2＋ could be enhanced in the presence of rufin in basic solution on platinum electrode. At pH 9.9, light emission intensity was found to be linear with rutin in the range of 1-50μmol/L.
基金Supported by the National Natural Science Foundation of China(No.20605020)the Distinguished Young Scholars of Jilin Province, China(No.20060112)the Fundamental Research Funds for the Central Universities(No.DL09BB25)
文摘The unique cathodic electrochemiluminescence（ECL） emission of Ru（bpy）3^2＋（bpy=2,2′-bipyridine） was observed via Nation film at Au electrode[Au/Nafion/Ru（bpy）3^2＋] at about 0.20 V（vs. Ag/AgCl） and applied to the determination of several amino acids without prior derivatization with high sensitivity. The cathodic electrochemiluminescence（ECL） exhibits the detection limits and linear ranges of several amino acids comparable to or better than those of capillary electrophoresis with conventional ECL detection method（at 1.10-1.20 V vs. Ag/AgCl） based on precolumn derivatization. The results suggest that the cathodic ECL is promising for the detection of amino acids in bioanalysis.
