polarGel™ GpC Columns
For Intermediate Polarity Solvents and Polar Solvent Combinations
The PolarGel range is ideal for use with polar solvents, for example dimethyl formamide and dimethyl sulfoxide, and for solvent combinations such as tetrahydrofuran with water. These eluents are very useful in GPC/SEC to separate polar materials, such as polar resins, modified polysaccharides or complex polar polymers that are difficult to analyze in traditional SEC solvents, such as tetrahydrofuran alone. PolarGel-L is used for low molecular weight polar polymers and PolarGel-M for high MW polar polymers. With polar polymers, highly polar groups can lead to non-specific interactions and secondary separation mechanisms when using polar solvents and traditional non-polar styrene/divinylbenzene columns. Additives and/or column conditioning are normally required to reduce these interactions. PolarGel has no need for these interventions, and also avoids the interactions and secondary effects that produce chromatogram distortions. These PolarGel “mixed bed” columns have a medium polarity surface and high mechanical stability. They are capable of operating in a wide range of solvents and solvent combinations, greatly enhancing your ability to analyze polar polymers that are not necessarily water soluble. PolarGel is available in two resolving ranges to meet your precise requirements.
Columns: Sample: Eluent: Flow Rate: Temp: Detector: 2 x PolarGel-M, 300 x 7.5 mm Melamine resins Dimethylformamide + 0.1% LiBr 1.0 mL/min 50 °C PL-GPC 220 (RI) Superior polar performance from PolarGel columns
Charateristics PolarGel-L Particle Size: 8 µm Resolving Range (PEG/PEO in water): Up to 30,000 g/mol PolarGel-M Particle Size: 8 µm Resolving Range (PEG/PEO in water): Up to 700,000 g/mol
For more information, please visit www.varianinc.com/polargel.html or visit www.varianinc.com/products.html to place an order.