Capillary electrophoresis/electrochemical detection system with on-line deoxygenation.
A capillary electrophoresis (CE)/electrochemical detection system with on-line deoxygenation was developed, consisting of a deoxygenation injector, a deoxygenation protector, and an electrochemical detection cell. When the system was utilized for 60 min, the steady-state current of oxygen detected could be dropped to 3% of the original value for the gold/mercury amalgam electrode and to 8% of the original value for the gold electrode, and the limit of detection could be decreased two orders of magnitude for the reducible analytes such as TI+ (from 3.1 x 10-5 mol/L to 8.0 x 10-7 mol/L) and metronidazole (from 3.8 x 10-5 mol/L to 4.0 x 10-7 mol/L).
Jin
W
W
Laboratory of Analytical Science, School of Chemistry, Shandong University, Jinan, China. wenrujin@jn-public.sd.cinfo.net
Dong
Q
Q
Yu
D
D
Ye
X
X
Li
W
W
D004563:Electrochemistry; D019075:Electrophoresis, Capillary / Q000379:methods*; D016014:Linear Models; D010100:Oxygen
D010100:Oxygen