We have characterized Atlantis ethylene-bridged hybrid C anion-exchange, a mixed-mode reversed-phase/weak anion-exchange stationary phase designed to give greater retention for anions (e.g., ionized acids) compared to conventional reversed-phase materials. The retention and selectivity of this stationary phase were compared to that of three benchmark materials, using a mixture of six polar compounds that includes an acid, two bases, and three neutrals. The compatibility of the ethylene-bridged hybrid C anion-exchange material with 100% aqueous mobile phases was also evaluated. We investigated the batch-to-batch reproducibility of the ethylene-bridged hybrid C anion-exchange stationary phase for 27 batches across three different particle sizes (1.7, 2.5, and 5 μm) and found it to be comparable to that of one of the most reproducible C stationary phases. We also characterized the acid and base stability of the ethylene-bridged hybrid C anion-exchange stationary phase and the results show it to be usable over a wide pH range, from 2 to 10. The extended upper pH limit relative to silica-based reversed-phase/weak anion-exchange materials is enabled by the use of ethylene-bridged hybrid organic/inorganic particles. The improved base stability allows Atlantis ethylene-bridged hybrid C anion-exchange to be used with a wider range of mobile phase pH values, opening up a greater range of selectivity options.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7986357 | PMC |
| http://dx.doi.org/10.1002/jssc.202001136 | DOI Listing |
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