INFLUENCE OF METAL IMPURITIES SORPTION ONTO A SILICA BASED C18 STATIONARY PHASE ON THE HPLC OF METAL CHELATING ANALYTES
- 1 January 1999
- journal article
- Published by Taylor & Francis in Journal of Liquid Chromatography & Related Technologies
- Vol. 22 (3) , 429-440
- https://doi.org/10.1081/jlc-100101670
Abstract
The chromatographic performance of metal chelating analytes on a C18 silica based stationary phase was studied. The influence of metal ions impurities on their peak shapes and the metal ions exchange properties of such a stationary phase were investigated. Evidence was obtained to support the proposition that sorption of metal ions onto the stationary phase base results in a chromatographic performance loss of the investigated metal chelating analytes. Since their retention is a function of strong complexing interactions and van-der-Waals forces, the mixed retention mechanism is best described as one of “metal interaction”.Keywords
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