US US20260233123A1
A method includes providing a sample including a carbon capture solvent and degradation products produced by a carbon capture operation. The method includes forming a mobile phase, where the mobile phase is buffered to a pH of at least 9; and diluting the sample, where a diluent used is buffered to a pH of at least 9, and where the diluent used has the same composition as the mobile phase at the start of the method. The method includes obtaining fractions of the solution by separating the sample with a hydrophilic interaction liquid chromatography (HILIC) system, where the HILIC system includes a stationary phase and the mobile phase; and measuring substances in the fractions with a detector. The method includes identifying the carbon capture solvent and degradation products based on a response of the detector as compared to the response of the detector from a set of standards.
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