Enhanced aminophenols monitoring using in-channel amperometric detection with dual-channel microchip capillary electrophoresis
SCIE
SCOPUS
- Title
- Enhanced aminophenols monitoring using in-channel amperometric detection with dual-channel microchip capillary electrophoresis
- Authors
- Chen, C; Hahn, JH
- Date Issued
- 2011-12
- Publisher
- SPRINGER HEIDELBERG
- Abstract
- Improved techniques are needed to monitor toxic aminophenols in industrial wastewater. Microchip capillary electrophoresis (CE)-electrochemical detection (ECD) can be used to develop miniaturized system providing on-site monitoring. Here, a dual-channel microchip CE-ECD has been applied for the monitoring of aminophenols. The effect of conductance and capacitance between a working electrode and a reference electrode has been studied to minimize the noise that was generated in the amperometric detection. A mixture of aminophenols dissolved in a running buffer has been monitored. A separation efficiency with a plate number of 4770 and a high linear concentration dependence from 100 nM to 1 mM have been achieved for p-aminophenol. As a result, the analysis system has been applied for the monitoring of the pollutants with low detection limits of p-aminophenol (14.6 nM), o-aminophenol (10.6 nM) and m-aminophenol (15.3 nM). Here, we show that a wastewater sample from a natural gas refinery can be monitored using the microchip CE-ECD system.
- Keywords
- Aminophenol; Capillary electrophoresis (CE); Dual-channel; Electrochemical detection (ECD); Environmental monitoring; Microchip; MICELLAR ELECTROKINETIC CHROMATOGRAPHY; COLUMN ELECTROCHEMICAL DETECTION; MICROBAND ARRAY ELECTRODES; P-AMINOPHENOL; POLY(DIMETHYLSILOXANE) MICROCHIP; POLYELECTROLYTE MULTILAYERS; CHIP; POLLUTANTS; SEPARATION; SYSTEM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16973
- DOI
- 10.1007/S10311-010-0307-X
- ISSN
- 1610-3653
- Article Type
- Article
- Citation
- ENVIRONMENTAL CHEMISTRY LETTERS, vol. 9, no. 4, page. 491 - 497, 2011-12
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