Electrophoretic separation of environmentally important phenolic compounds using montomorillonite‐coated fused‐silica capillaries
- 2 April 2007
- journal article
- ce and-cec
- Published by Wiley in Electrophoresis
- Vol. 28 (8), 1197-1203
- https://doi.org/10.1002/elps.200600493
Abstract
This paper reports a simple procedure for coating fused-silica capillaries with poly(diallyldimethyl ammonium chloride) and montmorillonite. The coated capillaries were characterized by performing EOF measurements as a function of buffer pH, number of layers of coating, and number of runs (stability). The coated capillaries showed a highly stable μEOF (run-to-run RSD less than 1.5%, n = 20), allowing continuous use for several days without conditioning. The coated capillaries were then used for the effective separation of nine environmentally important phenolic compounds showing a significant improvement in the resolution, when compared to bare fused-silica capillaries. The EOF of the coated capillaries was constant in alkaline solutions (pH ≥ 7), allowing the optimization of the separation conditions of phenolic compounds without significantly affecting the μEOF.Keywords
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