Summary
The reversed phase behaviour of high molecular mass polystyrenes was investigated on C18 bonded phase columns with ethyl acetate-methanol and ethyl acetateacetonitrile mobile phases. The results are compared with the corresponding dichloromethane mobile phases. The ethyl acetate-methanol mobile phase showed anomalous elution behaviour, similar to other previously investigated solvent combinations with methanol. The ethyl acetate-acetonitrile mobile phase showed no anomalous behaviour, increased retention and, elution over a wider composition range compared with the dichloromethane-acetonitrile system. However, resolution between adjacent molecular masses was considerably worse.
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Shalliker, R.A., Kavanagh, P.E. & Russell, I.M. Reversed phase behaviour of high molecular mass polystyrenes in ethyl acetate solvent mixtures. Chromatographia 39, 663–667 (1994). https://doi.org/10.1007/BF02274580
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DOI: https://doi.org/10.1007/BF02274580