Simultaneous Electrochemical Sensing of p‐Aminophenol and Hydroquinone by Using Grafted Tricholoma Mushroom Polysaccharide/Gold Composite Nanoparticles in Aqueous Media

Abstract

AbstractHerein, we report for the first time a novel electrochemical sensor for the simultaneous detection of para‐aminophenol (p‐AP) and hydroquinone (HQ) in aqueous medium using Tricholoma mushroom polysaccharide based graft copolymer‐Au composite nanoparticles (TMPG−Au NPs). The graft copolymer is synthesised by radical polymerization technique in aqueous medium using a mixture of acrylamide (AM), acrylic acid (AA) and Tricholoma mushroom polysaccharide (TMP). Further, TMPG−Au NPs is prepared using the graft copolymer as a reducing as well as stabilizing agent by green technique. The graft copolymer and TMPG−Au NPs are properly characterised. The detection of p‐AP and HQ in aqueous medium is carried out by linear sweep voltammetry (LSV) and Chronoamperometry (CA) without interfering other common phenolic compounds and environmentally relevant metal ions. In LSV experiment the p‐AP and HQ show clear and distinct oxidation peaks at 0.0814 V and −0.077 V respectively. The proposed sensor successfully detects p‐AP and HQ with very low detection limit 0.41 μM and 0.32 μM respectively and effectively.