Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho phthalaldehyde in Cultured Mammalian Cells In Vitro Monitoring of glutathione using ratiometric fluorescent sensor based on MnO2 nanosheets simultaneously tuning the fluorescence of Rhodamine 6G and thiamine hydrochloride ScienceDirect A validated method to assess glutathione peroxidase enzyme activity Chemical Papers Springer Nature Link A locally activatable sensor for robust quantification of organellar glutathione Nature Chemistry