Magnetic dispersive solid phase extraction based on polythiophene modified magnetic graphene oxide for mercury determination in seafood followed by flow-injection cold vapor atomic absorption spectrometry

Abstract

Microwave assisted digestion combined with DSPE based on polythiophene modified magnetic graphene oxide for mercury determination in seafood followed by FI-CVAAS.

Magnetic dispersive solid‐phase extraction based on graphene oxide/Fe3O4@polythionine nanocomposite followed by atomic absorption spectrometry for zinc monitoring in water, flour, celery and egg

“…The solution pH is one of the dominant parameters controlling metal chelate formation, the kind of analyte interaction with magnetic sorbent and the charges on the sorbent surface . The effect of sample pH was investigated within the range of 2.0–12.0 using HCl and NaOH (10 −2 mol L −1 of each, by a micropipette).…”

“…Graphene oxide (GO) is considered as a new class of carbon nanocomponent and exhibits special characteristics including high electrical conductivity, and exceptional mechanical and optical capabilities . The nanosheet of GO makes this material a well‐organized sorbent in MSPE, which is due to its massive surface area as well as its better chemical and thermal strength and bulky quantities of oxygen atoms on its surface, including epoxy, hydroxyl and carboxyl groups.…”

Sample Preparation Using Graphene-Oxide-Derived Nanomaterials for the Extraction of Metals

“…A polythiophene (PTh)-modified magnetic GO nanocomposite was synthesized and used for the determination of mercury in seafood prior to its detection by flow-injection cold vapor atomic absorption spectrometry (FI-CVAAS) [60]. Sulfur-containing molecules such as polythiophene exhibit good affinity towards mercury, which acts as a soft acid.…”

Trace determination of chlorpheniramine in human plasma using magnetic dispersive solid-phase extraction based on a graphene oxide/Fe3O4@polythionine nanocomposite combined with high-performance liquid chromatography

“…The solution pH play an important role controlling the kind of analyte interaction with magnetic sorbent and the charges on the sorbent surface. 25 In order to obtain highest extraction efficiency, the effect of sample pH was investigated within the range of 2.0-13.0 using phosphoric acid and NaOH. The results in Fig.…”

“…24 Graphene oxide (GO), the functionalized graphene with oxygen-containing chemical groups, with novel properties such as high electrical conductivity as well as exceptional mechanical and optical properties has attracted tremendous attention from both the experimental and theoretical scientic communities in recent years. 25 The nanosheet of GO make this material a suitable sorbent for MSPE, which is due to high specic surface area, greater chemical, thermal steadiness and bulky quantities of oxygen atoms on its surface such as epoxy, hydroxyl, and carboxyl groups. As a result, GO has suitable functional groups for the strong p-p interaction between GO and analyte of interest.…”