The characterization of silica microparticles by electrophoretic mobility measurements
- Cite this article as:
- Dietrich, P.G., Lerche, K.H., Reusch, J. et al. Chromatographia (1997) 44: 362. doi:10.1007/BF02466311
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Electrophoretic mobility measurements in the pH 2‐10 range are described for several commercial HPLC silica microparticles and a laboratory-produced product. The content of metal impurities for the silicas was also determined by AAS. An acidic/hydrothermal treatment was used to generate a more homogenous surface for some of the silicas. The zero points of charge (zpc) for both a native and a treated silica plus several commercial HPLC silicas were compared. The electrophoretic mobility method may be useful in predicting the utility of certain types of silica supports for chromatographic separations.