Hydrophilic interaction chromatography (or hydrophilic interaction liquid chromatography, HILIC) is a version of normal phase liquid chromatography. The name was suggested by Dr. Andrew Alpert in his 1990 paper on the subject.
He described the chromatographic mechanism for it as liquid-liquid partition chromatography.
Any polar

Chemical polarity

In chemistry, polarity refers to a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment. Polar molecules interact through dipole–dipole intermolecular forces and hydrogen bonds. Molecular polarity is dependent on the difference in...

 chromatographic surface can be used for HILIC separations.