Grafting of glutathione to magnetic graphene oxide and application for the determination of As(iii)/(v) in food samplesviaa zeta potential analyzer

Abstract

A new selective method based on magnetic dispersive solid-phase extraction (MDSPE) and a zetasizer system is proposed for the determination of As(iii)/As(v) species in some water and food samples.

Highly selective adsorption of cadmium ions by water‐dispersible magnetic thioglycolic acid/graphene oxide composites

“…For transdermal vaccination, the particles need to remain stable in the suspension buffer before delivery. For good suspendability, a potential of ±25 mV is ideal . Hence, the zeta potential was used in this study to evaluate Cd (II) in real samples.…”

“…For good suspendability, a potential of ±25 mV is ideal. [12] Hence, the zeta potential was used in this study to evaluate Cd (II) in real samples. The Cd (II) and blank formulations were suspended in ultrapure water.…”

“…Most of the commercialized or developing adsorbents are of sub‐micrometre to micrometre size and have large internal porosities to ensure adequate surface area for adsorption. Recently, the combination of organic and inorganic components in a single particle at the nanometric level has attracted considerable attention because of the wide potential applications in many fields such as separation processes, optoelectronics, catalysts and/or sensors, biotechnology, medical diagnosis and therapy . Nanometric materials have become more and more important as solid phases due to their special properties.…”

“…The development of nanotechnology offers a great potential to increase the sensitivity of metal analysis. For example, incorporation of carbon nanotubes, [10] functionalized graphene [11] and magnetic graphene oxide, [12,13] quantum dots [14] and ordered mesoporous carbon [15] has greatly improved metal ion analysis capability due to unique advantages: enhancement of mass transport, high effective surface area and controllable electrode microenvironment. [16] Most of the commercialized or developing adsorbents are of sub-micrometre to micrometre size and have large internal porosities to ensure adequate surface area for adsorption.…”

“…Recently, the combination of organic and inorganic components in a single particle at the nanometric level has attracted considerable attention because of the wide potential applications in many fields such as separation processes, optoelectronics, catalysts and/or sensors, biotechnology, medical diagnosis and therapy. [10][11][12][13][14][15][16][17][18] Nanometric materials have become more and more important as solid phases due to their special properties. Although investigations of the surface chemistry of highly dispersed oxides, e.g.…”