Polyethylene Glycol/Oxide 

These hydrophilic polymers are suitable for both aqueous SEC and organic GPC using the majority of polar organic solvents. The oxides are available in high molecular weights, while the glycols cover the lower molecular weight range. The two types are chemically similar and so they can be used together across a wider molecular weight range, with aqueous and organic polymers from 106 – 1 million MW. Every kit contains 0.2 g or 0.5 g of ten different molecular weight standards.