Patent ID: 9506897
Filing Date: 2016-11-29
CPC Classification: G01N

Claim Text:
1. A method for analyzing or purifying one or more ionic analytes in a sample by anion-exchange chromatography, comprising: providing an anion-exchange column packed with an anion-exchange stationary phase; providing an anion-exchange mobile phase having a modifying agent; performing anion-exchange chromatography under a condition allowing anion exchange between the one or more ionic analytes in the sample and the anion-exchange stationary phase, thereby separating the one or more ionic analytes in the anion-exchange column; and analyzing and/or collecting the separated one or more ionic analytes; wherein: the modifying agent is an alkylene oxide oligomer comprising at least three units of an alkylene oxide moiety; and at least one of the one or more ionic analytes comprises a polyethylene-glycol moiety.