1521-4109/asset/2049_left.gif?v=1&s=d971976ddd1fb423bc0ed04ac08d79fc2a6500de)
1521-4109/asset/olbannerright.gif?v=1&s=0b6a8a49b6b75dacb1a70c2d738ec5c7ab594864)
Short Communication
Carbon Paste Electrode Modified with Carbamoylphosphonic Acid Functionalized Mesoporous Silica: A New Mercury-Free Sensor for Uranium Detection
Article first published online: 3 MAR 2004
DOI: 10.1002/elan.200302868
Copyright © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
1521-4109/asset/cover.gif?v=1&s=209b447dcf920ba3fb44f2b08a87a6b586320422 "Electroanalysis")
Additional Information
How to Cite
Yantasee, W., Lin, Y., Fryxell, Glen E. and Wang, Z. (2004), Carbon Paste Electrode Modified with Carbamoylphosphonic Acid Functionalized Mesoporous Silica: A New Mercury-Free Sensor for Uranium Detection. Electroanalysis, 16: 870–873. doi: 10.1002/elan.200302868
Publication History
- Issue published online: 21 MAY 2004
- Article first published online: 3 MAR 2004
- Manuscript Accepted: 5 MAY 2003
- Manuscript Received: 1 APR 2003
- Abstract
- References
- Cited By
Keywords:
- Uranium;
- Sensor;
- Modified electrode;
- Mesoporous silica
Abstract
This study reports a new approach for developing a uranium electrochemical sensor that is mercury-free, solid-state, and has less chance for ligand depletion than existing sensors. A carbon-paste electrode modified with carbamoylphosphonic acid self-assembled monolayer on mesoporous silica was developed for uranium detection based on an adsorptive square-wave stripping votammetry technique. Voltammetric responses for uranium detection are reported as a function of pH, preconcentration time, and aqueous phase uranium concentration. The uranium detection limit is 25 ppb after 5 minutes preconcentration and improved to 1 ppb after 20 minutes preconcentration. The relative standard deviations are normally less than 5%.