Recent trends in nanomaterial-based microanalytical systems for the speciation of trace elements: A critical review

Tseng, Wei-Chang; Hsu, Keng-Chang; Shiea, Christopher; Huang, Yeou‐Lih

doi:10.1016/j.aca.2015.02.041

Cited by 29 publications

(8 citation statements)

References 146 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interest in the use of nano materials as sorbents to separate and pre-concentrate trace elements is currently increasing. A recent review 115 summarizes some applications of these materials as sorbents for arsenic complexes, applied to arsenic species determination with final measurement by spectroscopic techniques, among them ETAAS. Hassanpoor et al.…”

Section: Analytical Methods and Measurement Techniquesmentioning

confidence: 99%

“…A recent review 115 summarizes some applications of these materials as sorbents for arsenic complexes, applied to arsenic species determination with final measurement by spectroscopic techniques, among them ETAAS. Hassanpoor et al 116 describes a new sorbent based on aluminum oxide nanoparticles functionalized by a ligand, applied as a pre-concentration system for inorganic arsenic speciation in spiked food samples, with final measurement by graphite furnace atomic absorption spectroscopy (GFAAS).…”

Section: Techniques Involving Direct Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

2016

View full text Add to dashboard Cite

Here we review recent developments in analytical proposals for the assessment of inorganic arsenic (iAs) content in food products. Interest in the determination of iAs in products for human consumption such as food commodities, wine, and seaweed among others is fueled by the wide recognition of its toxic effects on humans, even at low concentrations. Currently, the need for robust and reliable analytical methods is recognized by various international safety and health agencies, and by organizations in charge of establishing acceptable tolerance levels of iAs in food. This review summarizes the state of the art of analytical methods while highlighting tools for the assessment of quality assessment of the results, such as the production and evaluation of certified reference materials (CRMs) and the availability of specific proficiency testing (PT) programmes. Because the number of studies dedicated to the subject of this review has increased considerably over recent years, the sources consulted and cited here are limited to those from 2010 to the end of 2015.

show abstract

Section: Analytical Methods and Measurement Techniquesmentioning

confidence: 99%

Section: Techniques Involving Direct Measurementmentioning

confidence: 99%

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

2016

View full text Add to dashboard Cite

show abstract

“…Nowadays, several analytical techniques with low detection limits (DL) are available for the determination of metals with enough sensitivity for most applications [6][7][8][9][10]. In this sense, the most common are atomic absorption spectrometry (AAS), inductively coupled plasma-atomic emission spectrometry (ICP-AES) and inductively coupled plasma-mass spectrometry (ICP-MS), among others.…”

Section: Introductionmentioning

confidence: 99%

Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II)

et al. 2022

View full text Add to dashboard Cite

Monitoring water quality has become a goal to prevent issues related to human health and environmental conditions. In this sense, the concentration of metal ions in water sources is screened, as these are considered persistent contaminants. In this work, we describe the implementation of customized graphite electrodes decorated with two types of Hg nanoparticles (Hg-NPs), optimized toward the electrochemical detection of Cd, Pb and Cu. Here, we combine Hg, a well-known property to form alloys with other metals, with the nanoscale features of Hg-NPs, resulting in improved electrochemical sensors towards these analytes with a substantial reduction in the used Hg amount. Hg-NPs were synthesized using poly(diallyldimethylammonium) chloride (PDDA) in a combined role as a reducing and stabilizing agent, and then appropriately characterized by means of Transmission Electron Microscopy (TEM) and Zeta Potential. The surface of composite electrodes with optimized graphite content was modified by the drop-casting of the prepared Hg-NPs. The obtained nanocomposite electrodes were morphologically characterized by Scanning Electron Microscopy (SEM), and electrochemically by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The results show that the Hg-NP-modified electrodes present better responses towards Cd(II), Pb(II) and Cu(II) detection in comparison with the bare graphite electrode. Analytical performance of sensors was evaluated by square-wave anodic stripping voltammetry (SWASV), obtaining a linear range of 0.005–0.5 mg·L−1 for Cd2+, of 0.028–0.37 mg·L−1 for Pb2+ and of 0.057–1.1 mg·L−1 for Cu2+. Real samples were analyzed using SWASV, showing good agreement with the recovery values of inductively coupled plasma–mass spectrometry (ICP-MS) measurements.

show abstract

“…Usually, nanomaterials are applied as adsorbents due to their higher specific surface area having active sites, selectivity and adsorption rate kinetics for removing pollutants to parts per billion compared with other conventional adsorbents . Different types of inorganic nanomaterials based on silica, clay, titania, carbon (such as carbon nanotubes, graphene derivatives) and polymer nanocomposites have been used to adsorb water pollutants from wastewater . There are some drawbacks for applying the nanomaterials as adsorbents due to their toxicity, bioactivity, recyclability and difficulties in collecting the nanomaterials and separating them from the treated water.…”

Section: Introductionmentioning

confidence: 99%

Preparation of magnetite and silver poly(2‐acrylamido‐2‐methyl propane sulfonic acid‐co‐acrylamide) nanocomposites for adsorption and catalytic degradation of methylene blue water pollutant

Atta

Gafer

Al‐Lohedan

et al. 2019

Polymer International

View full text Add to dashboard Cite

The aim of the present work was to prepare microgel nanocomposites based on silver and magnetite to apply as adsorbents and heterogeneous catalysts for removal of methylene blue (MB) cationic dye from aqueous solution. For this, 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and acrylamide (AAm) monomers were used to prepare AMPS/AAm microgel based on the emulsion technique. Ag and Fe 3 O 4 nanoparticles were embedded into the AMPS/AAm microgel using the in situ technique. Their particle sizes, surface charges, crystalline lattice structure, morphology, magnetic properties and thermal stability were investigated. The AMPS/AAm hydrogel nanocomposites were used as an adsorbent to remove MB dye. The AMPS/AAm microgel nanocomposites were tested as catalysts to reduce MB and degrade its chemical structure with heterogeneous Fenton oxidation using Ag and Fe 3 O 4 nanocomposites, respectively. This study presents promising data as the prepared materials used as adsorbents and catalysts show competitive features compared with the data presented in the literature.

show abstract

Recent trends in nanomaterial-based microanalytical systems for the speciation of trace elements: A critical review

Cited by 29 publications

References 146 publications

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II)

Preparation of magnetite and silver poly(2‐acrylamido‐2‐methyl propane sulfonic acid‐co‐acrylamide) nanocomposites for adsorption and catalytic degradation of methylene blue water pollutant

Contact Info

Product

Resources

About