A new strategy for the preparation of mixed-mode chromatographic stationary phases based on modified dialdehyde cellulose.

A new strategy for the preparation of mixed-mode chromatographic stationary phases based on modified dialdehyde cellulose was proposed. Two novel mixed-mode chromatographic stationary phases, dicarboxyl cellulose-modified silica (DCC/SiO2) and (S)-α-phenylethylamine-bonded DCC/SiO2 ((S)-α-PEA/DCC/SiO2), were prepared by utilizing the easy functionalization characteristics of dialdehyde cellulose. The chromatographic evaluation showed that DCC/SiO2 column could be used in hydrophilic interaction liquid chromatography (HILIC) and ion exchange chromatography (IEC) modes, (S)-α-PEA/DCC/SiO2 column could be used in HILIC, IEC and chiral separation modes. The DCC/SiO2 column and (S)-α-PEA/DCC/SiO2 column exhibited excellent chromatographic performance by separating strongly polar compounds, phenylamines and chiral compounds in the above separation modes. The preparation method of modified dialdehyde cellulose-based mixed-mode chromatographic stationary phases was simple, and also provided a new idea for the development of the subsequent novel mixed-mode chromatographic stationary phases.