Ultra sensitive detection of Cd (II) using reduced graphene oxide carboxymethyl cellulose glutathione modified electrode ScienceDirect Defect rich MnOx nanobelts prepared for glutathione detection in recent study A graphene oxide based switch on fluorescent probe for glutathione detection and cancer diagnosis ScienceDirect PDF) Novel synthesis of mixed Cu CuO reduced graphene oxide nanocomposite with enhanced peroxidase like catalytic activity for easy detection of glutathione in solution and using paper strip