Ideal for the Separation of Highly Polar Basic Compounds. Shim-pack GIS HILIC is designed for Hydrophilic Interaction Liquid Chromatography (HILIC). It is chemically bonded with a diol group, which provides excellent peak shape for basic and neutral polar compounds. In addition, HILIC is a variation of normal phase mode. It is capable of using organic solvents mixed with water as mobile phase, while normal phase mode uses nonaqueous organic solvents. In HILIC, the higher the organicconcentration in the solvents, the greater is the retention of highly polar compounds. Bonded Phase Diol Groups, Particle Size 3 ?m, 5 ?m, Pore Size 10 nm, Surface Area 450 m2/g, Carbon Loading 20 %, End-capping No, pH Range 2 to 7.5, USP Code L20.