Graphene oxide doped soluble eggshell membrane composited to Fe3O4 nanoparticles (GO/SEP/Fe3O4) as an efficient nano-sorbent for preconcentration of Malachite Green

Graphene, a new class of 2D carbon nanomaterials with one atom thickness, has attracted considerable attention in recent years [1]. Eggshell membrane is a cheap, green and easily achievable biopolymer which has been used frequently in analytical science [2]. Malachite green (MG) is a triphenylmethane dye, originally used as a dyeing agent in the textile industry, has also been widely used in the fish farming industry during the last decades. The reason for its popularity is derived from its broad antimicrobial spectrum and effectiveness in the prevention and treatment of certain fish diseases compared to other fishery chemicals. In present study, graphene oxide doped soluble eggshell membrane nanocomposite (GO/SEP) was doped with magnetic nanoparticles via a simple co-precipitation method. The resulted GO/SEP/Fe3O4 nanocomposite was used as an efficient nano-sorbent for preconcentration and determination of Malachite green using spectrophotometric method. The resulted method could be used effectively for the determination of Malachite green in the range 0.5-250 ng mL-1 with detection limit of 0.2 ng mL-1. Preconcentration factor and adsorption capacity of the GO/SEP/Fe3O4 were calculated 83.3 and 260.4 mg g-1 respectively.