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- W2004554170 abstract "Abstract Liquid chromatographic systems for the separation of phenoxypropanolamines were investigated. Bonded phases from different manufacturers were tested for column efficiency and peak symmetry. Phosphate buffer solutions containing acetonitrile were used as mobile phases. The effect of amine modifiers on the chromatographic performance was examined, and it was found that even for columns adapted for the separation of amines there was a significant improvement. Silica as the solid phase was modified by the presence of both hydrophobic ammonium ions and counter-ions in aqueous mobile phases of pH 2. The alkylammonium modifier is enriched as an ion pair on the solid phase, and the retention of hydrophobic compounds is strongly affected by the stationary phase formed. Selectivity changes were observed as the content of modifier was altered. Peak symmetry and efficiency were quite different for some pairs of amines with the same capacity factor, indicating a complex retention mechanism." @default.
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- W2004554170 date "1984-01-01" @default.
- W2004554170 modified "2023-09-24" @default.
- W2004554170 title "Influence of mobile phase additives in liquid chromatography of phenoxypropanolamines" @default.
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- W2004554170 doi "https://doi.org/10.1016/s0021-9673(00)96160-0" @default.
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