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Estimation of glomerular filtration rate (eGFR) is essential to assess kidney function. Iodine‐containing contrast agents detection by HPLC has been proposed as a safe alternative for inulin or radioactive compounds. However, HPLC is a time‐consuming and labor‐intensive method. The aim of this study was to develop an assay for iohexol and iothalamate using capillary electrophoresis. Iohexol and iothalamate...