Use of an ion exchange membrane to remove impurities from cell-binding agent cytotoxic agent conjugates

摘要

The invention provides processes for preparing purified cell-binding agent cytotoxic agent conjugates comprising subjecting a mixture comprising a cell-binding agent cytotoxic agent conjugate and one or more impurities to an ion exchange chromatography membrane to remove at least a portion of the impurities from the mixture, thereby providing a purified cell-binding agent cytotoxic agent conjugate.