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Article
Detection of receptor tyrosine kinase-orphan receptor-2 using an electrochemical immunosensor modified with electrospun nanofibers comprising polyvinylpyrrolidone, soy, and gold nanoparticles
An electrochemical immunosensing platform was developed for the detection of receptor tyrosine kinase-orphan receptor-2 (ROR2) at a glassy carbon electrode (GCE) modified with the electrospun nanofiber contain...
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Article
Magnetic solid-phase extraction based on modified magnetic meso-porous silica nanospheres for pre-concentration of trace amounts of gold/silver samples in the water and plant environment before analyzing by flame atomic absorption spectrometry
In this study, a sufficient nanostructure sorbent was produced via Fe3O4 magnetic meso-poroussilica and cetyltrimethylammonium bromide (CTAB) as surfactant sample by using a sol–gel technique. To improve the adso...
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Article
Open AccessIntroduction of a Zn-based metal–organic framework @ biomass porous activated carbon as a high-sensitive coating for a stainless steel SPME fiber: application to the simultaneous analysis of nonsteroidal anti-inflammatory drugs
The present study introduces a high-efficiency nanocomposite material featuring a zinc-based metal–organic framework and a novel porous activated carbon derived from bread waste. The prepared nanocomposite, na...
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Article
Open AccessPreparation of a new coating of graphene oxide/nickel complex on a nickelized metal surface for direct immersion solid phase microextraction of some polycyclic aromatic hydrocarbons
Solid-phase microextraction (SPME) is a versatile sampling and sample preparation technology that possess a significant application in the extraction and pre-concentration of a broad range of micro-pollutants ...
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Article
Introduction of commercial heating elements of resistance metal alloys as the novel solid-phase microextraction fibers for chromatographic monitoring of organic pollutants
In this work, two novel coiled solid-phase microextraction (C-SPME) fibers based on resistance metal alloys named aluchrom and nichrome were developed for the first time. The coiled fibers were easily prepared...
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Article
Electrodeposition of Ag nanoparticles on graphenized pencil lead electrode as a sensitive and low-cost sensor for iodate determination
In this study, a simple, sensitive and low-cost iodate electrochemical sensor based on graphenized pencil lead electrode (GPLE) modified with Ag nanoparticles (AgNPs) was presented. The GPLE was simply prepare...
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Article
Graphene quantum dots–eggshell nanocomposite to extract polycyclic aromatic hydrocarbons in water
In solid-phase extraction, the sorbent controls selectivity, affinity, and loading capacity. Many sorbents can be used, such as functionalized resin, naphthalene, activated carbon, molecular-imprinted polymers...
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Article
Application of Magnetic Graphene Nanoparticles for Determination of Organophosphorus Pesticides Using Solid-Phase Microextraction
In this study, a solid-phase microextraction (SPME) fiber based on ceramic–magnetic graphene (C–G/Fe3O4) nanoparticles was coated on a glass tube by sol–gel technology. Scanning electron micrographs of the fiber ...
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Article
Solid phase extraction of mercury(II) using soluble eggshell membrane protein doped with reduced graphene oxide, and its quantitation by anodic strip** voltammetry
This article describes the preparation of a nanocomposite consisting of soluble eggshell membrane protein (SEP) doped with reduced graphene oxide (rGO) as a sorbent for the preconcentration of mercury(II) by s...
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Article
High catalytic performance of Pt nanoparticles via support of conducting polymer for electrooxidation of methanol at carbon ceramic electrode
Carbon ceramic electrode (CCE), a new electrode substrate, was prepared by sol–gel procedure and used for the electropolymerization of aniline and dispersion of platinum nanoparticles into the resulting polyan...
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Article
Graphene ceramic composite as a new kind of surface-renewable electrode: application to the electroanalysis of ascorbic acid
This study introduces a new surface-renewable electrode based on a sol–gel derived graphene ceramic composite. The electrode was prepared by dispersing graphene nanosheets into a solution of the sol–gel precur...
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Article
Amperometric determination of L-tyrosine by an enzymeless sensor based on a carbon ceramic electrode modified with copper oxide nanoparticles
We report on the electrochemical formation of copper oxide nanoparticles (CuO-NPs) at a carbon ceramic electrode (CCE) as a highly-porous substrate. A copper film was deposited on the surface of the CCE and de...
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Article
Non-enzymatic hydrogen peroxide sensor using an electrode modified with iron pentacyanonitrosylferrate nanoparticles
An electrochemical sensor was developed for determination of hydrogen peroxide (HP) based on a carbon ceramic electrode modified with iron pentacyanonitrosylferrate (FePCNF). The surface of an iron-doped CCE w...
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Article
Application of a Palladium Hexacyanoferrate Film-Modified Aluminum Electrode to Electrocatalytic Oxidation of Hydrazine
A palladium hexacyanoferrate (PdHCF) film as an electrocatalytic material was obtained at an aluminum (Al) electrode by a simple electroless dip** method. The modified Al electrode demonstrated a well-behave...
