New polar-embedded stationary phase for surfactant analysis. 2006

Xiaodong Liu, and Christopher A Pohl, and Joachim Weiss
Dionex Corporation, Sunnyvale, CA 94088, USA.

The separation and identification of surfactants is a challenge due to the diversity of surfactants, the complex composition of surfactant raw materials, and the complexity of the sample matrices. High-performance liquid chromatography (HPLC) is the preferred analytical technique, because it allows the characterization of surfactant raw materials according to their composition and the quantitation of individual surfactants in complex mixtures. Although many HPLC columns are available for surfactant analysis, none of these columns provide optimal selectivity for the simultaneous analysis of anionic, non-ionic, and cationic surfactants using the same mobile phase system. In this paper, we describe a new polar-embedded stationary phase for the simultaneous analysis of anionic, non-ionic, and cationic surfactants with a simple and volatile mobile phase system containing ammonium acetate buffer and acetonitrile, utilizing evaporative light-scattering detection (ELSD). Mobile phase ionic strength and pH are important for optimizing chromatographic conditions. The column offers ideal selectivity for different types of surfactants, excellent peak shapes, especially for cationic surfactants, improved resolution for oligomers in ethoxylated surfactants, and compatibility with highly aqueous mobile phases. Thus, it can be used not only for quality assurance of individual surfactants, but also for the analysis of a variety of surfactant-containing formulations.

UI MeSH Term Description Entries
D002851 Chromatography, High Pressure Liquid Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D006863 Hydrogen-Ion Concentration The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D012542 Scattering, Radiation The diversion of RADIATION (thermal, electromagnetic, or nuclear) from its original path as a result of interactions or collisions with atoms, molecules, or larger particles in the atmosphere or other media. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Radiation Scattering,Radiation Scatterings,Scatterings, Radiation
D012997 Solvents Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed) Solvent
D013501 Surface-Active Agents Agents that modify interfacial tension of water; usually substances that have one lipophilic and one hydrophilic group in the molecule; includes soaps, detergents, emulsifiers, dispersing and wetting agents, and several groups of antiseptics. Surface Active Agent,Surface-Active Agent,Surfactant,Surfactants,Tenside,Amphiphilic Agents,Surface Active Agents,Tensides,Active Agent, Surface,Active Agents, Surface,Agent, Surface Active,Agent, Surface-Active,Agents, Amphiphilic,Agents, Surface Active,Agents, Surface-Active
D013997 Time Factors Elements of limited time intervals, contributing to particular results or situations. Time Series,Factor, Time,Time Factor
D015203 Reproducibility of Results The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results. Reliability and Validity,Reliability of Result,Reproducibility Of Result,Reproducibility of Finding,Validity of Result,Validity of Results,Face Validity,Reliability (Epidemiology),Reliability of Results,Reproducibility of Findings,Test-Retest Reliability,Validity (Epidemiology),Finding Reproducibilities,Finding Reproducibility,Of Result, Reproducibility,Of Results, Reproducibility,Reliabilities, Test-Retest,Reliability, Test-Retest,Result Reliabilities,Result Reliability,Result Validities,Result Validity,Result, Reproducibility Of,Results, Reproducibility Of,Test Retest Reliability,Validity and Reliability,Validity, Face

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