Abstract
A poly(4-vinylpridine-co-ethylene glycol dimethacrylate) monolith was synthesized in a capillary and constructed as a concentrator for the in-line polymeric monolith microextraction coupling with capillary electrophoresis. The integrated system was then used for the simultaneous determination of five trace phenols (2-nitrophenol, 3-nitrophenol, 4-nitrophenol, 2-chlorophenol, and 2,4-dichlorophenol) in water samples. The experimental parameters for in-line solid-phase extraction, such as composition and volume of the elution plug, pH of sample solution, and the time for sample loading were optimized. The sensitivity for the mixture of phenols (2-nitrophenol, 3-nitrophenol, 4-nitrophenol, 2-chlorophenol, and 2,4-dichlorophenol) enhanced to 615-2222 folds at the optimum condition was compared to the sensitivity for a normal hydrodynamic injection in capillary electrophoresis. Linearity ranged from concentration of 10-500 ng mL(-1) (R(2) > 0.999) for all five phenols with the detection limits of 1.3-3.3 ng mL(-1) . In tap, snow and Yangtze River water spiked with 20 ng mL(-1) and 200 ng mL(-1) , respectively, the recoveries of 84-105% were obtained. It has been demonstrated that this work has great potential for the analysis of phenols in genuine water samples.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.