Detection and quantitation of cyclodextrins

A method for recovering a cyclodextrin or cyclodextrin derivative from a solution comprising a protein recombinantly expressed in the presence of the cyclodextrin or cyclodextrin derivative, the method comprising loading the solution on a size exclusion chromatography (SEC) column, wherein the solution does not undergo a step of extraction prior to being loaded on the SEC column;

• separating the cyclodextrin or cyclodextrin derivative from the recombinantly expressed protein by SEC;
• contacting the cyclodextrin or cyclodextrin derivative with an agent that forms a detectable inclusion complex with the separated cyclodextrin or cyclodextrin derivative;
• and measuring the amount of a signal from the inclusion complex, wherein the signal is indicative of the quantity of the cyclodextrin or cyclodextrin derivative recovered from the solution.