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GRFT thermal stability. GRFT (450 μg/mL) in Milli-Q water was exposed to 5 °C, 25 °C/60%RH, 30 °C/65%RH, 40 °C/75%RH, and 65 °C in controlled temperature/humidity Carson 6010 environmental chambers for 28 days. Relative humidity (RH) control at 5 °C and 65 °C was not available. GRFT concentration was monitored via HPLC with fluorescence detection. The inset is included to better display the thermal stability trends at the four lower temperature conditions
