Colorimetric detection and determination of glutathione based on superoxide radical assisted etching approach ScienceDirect Evaluation of Glutathione (GSH) System in Porcine Saliva: Validation and Application of Colorimetric Method Sandwich ELISA Reduced Glutathione (GSH) Colorimetric Assay Kit (E BC K030 M) at 15800 kit in New Delhi Sensitive colorimetric detection of glutathione in human serum based on peroxidase like activity of chitosan stabilized gold nanoparticles Microchimica Acta Springer Nature Link A colorimetric method to measure oxidized, reduced and to Highly sensitive quantitative detection of glutathione based on a fluorescence colorimetric dual signal recognition strategy ScienceDirect