Abstract
The use of siliceous supports (controlled-porosity glass or silica gel) with thermally immobilized Carbowax 20M as sorbents for the separation of benzodiazepines by high-performance liquid chromatography (HPLC) was studied. The physico-chemical and chromatographic properties of these sorbents were compared with those of LiChrosorb DIOL and LiChrosorb RP-18. The results indicate that normal-phase HPLC chromatography of benzodiazepines using sorbents with thermally immobilized Carbowax 20M is a simple and effective method characterized by a simple binary mobile phase, very short column equilibration, high selectivity and a short time of analysis.
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