Flow-injection analysis of oxidizable species with reverse-pulse amperometric detection.
The technique of reverse-pulse amperometry is applied for the detection of oxidizable organic species at a solid-electrode flow detector. Exploiting the reverse-pulse amperometric waveform gives better sensitivity than d.c. amperometric detection. Species (e.g., phenols) giving responses that are poorly separated from background are easily monitored. Reducible species can be monitored without deaeration of the solution. The effects of flow-rate, waiting time between pulses, precision, and linearity of response are reported. At a flow-rate of 1.0 ml/min injection rates of 180 samples per hour and detection limits of a few tenths of a nanogram are obtainable.
Wang
J
J
Department of Chemistry, New Mexico State University, Las Cruces, NM 88003, U.S.A.
Dewald
H D
HD