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Updated: Jul 8, 2026

Extraction and Characterization of Surfactants from Atmospheric Aerosols
Published on: April 21, 2017
New hydrophilic interaction/reversed-phase mixed-mode stationary phase and its application for analysis of nonionic
Xiaodong Liu1, Christopher Pohl
1Dionex Corporation, Sunnyvale, CA 94088, USA. xiaodong.liu@dionex.com
Abstract:
We have developed a new stationary phase that combines both hydrophilic interaction and reversed-phase characteristics. The new phase is based on high-purity, porous and spherical silica gel functionalized with a silyl ligand consisting of both hydrophilic and hydrophobic functionalities. This phase can be operated in both HILIC mode (high organic solvent) and RPLC mode (low organic solvent). An optimal balance of hydrophilic and hydrophobic moieties on the silica surface provides unique chromatographic properties that make it useful for determination of alkyl chain distribution and degree of ethoxylation (EO number) of nonionic ethoxylated surfactants.
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