Nanomaterials for elemental speciation

Karadjova, Irina; Dakova, Ivanka; Yordanova, Tanya; Vasileva, Penka

doi:10.1039/c6ja00168h

Cited by 32 publications

(12 citation statements)

References 162 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Iron, nickel, cobalt and their oxides constitute the core of most of the MNPs. The surface of the MNPs is frequently covered by molecular imprinted polymers, silica or graphene, in order to avoid nanoparticles aggregation [55]. Once the sorption of the analyte is complete on the magnetic sorbent, they are separated by an external magnetic field.…”

Section: Sample Treatment For Total Hg Determination Assisted By Solid-phase Extractionmentioning

confidence: 99%

“…Therefore, any additional step of physical separation (i.e., centrifugation, filtration) is required. The analyte is eluted by magnetic separation of the regenerated solvent, resulting in a simple and fast methodology [55]. Considering the multiple advantages of MSPE, there is an unquestionable trend on its application to Hg (and other heavy metal ions).…”

Section: Sample Treatment For Total Hg Determination Assisted By Solid-phase Extractionmentioning

confidence: 99%

“…The use of ZrO2-NPs improves the efficiency of the photocatalytic system, compared to nanosized TiO2 [55]. A UV/nano-ZrO2/HCOOH photocatalytic reduction unit was developed as an on-line interface between HPLC and AFS for Hg speciation.…”

Section: Vapor Generation Of Hg Species Assisted By Nanomaterialsmentioning

confidence: 99%

See 2 more Smart Citations

Advances in the Determination of Xenobiotics in Foods

2019

Current and Future Developments in Food Science

View full text Add to dashboard Cite

Mercury (Hg) pollution is an acknowledged major environmental problem. Considering its extreme toxicity, Hg has recently been included in the top ten list of chemicals of major public health concern according to the World Health Organization. Once released into the environment, it is transformed in aquatic ecosystems by microorganisms into the neurotoxic methylmercury. The hazardous effect is then biomagnified through the trophic/food chain. Diet is considered the main exposure pathway of Hg in humans. Therefore, safety values have been established by food safety authorities in order to protect consumers. Seafood, followed by rice, is the primary source of Hg in the human diet. A variety of analytical methodologies is available for the analysis of Hg and its species in food. This chapter presents recent advances in the determination of Hg in foodstuffs. Special attention is given to innovative Hg (species) extraction and preconcentration systems assisted by nanoparticles. Non-chromatographic approaches, as an alternative to classical chromatographic approaches used for speciation are detailed. The potential and limitations of Hg isotopic analysis in food is also discussed.

show abstract

Section: Sample Treatment For Total Hg Determination Assisted By Solid-phase Extractionmentioning

confidence: 99%

Section: Sample Treatment For Total Hg Determination Assisted By Solid-phase Extractionmentioning

confidence: 99%

See 1 more Smart Citation

Advances in the Determination of Xenobiotics in Foods

2019

Current and Future Developments in Food Science

View full text Add to dashboard Cite

show abstract

“…In the 364 articles cited (no titles) there is one citation to the determination of butyltin compounds (by GC separation on single-walled carbon nanotubes). In contrast, the second review 18 surface enhanced Raman and fluorescence spectroscopies. The reviewers conclude that although speciation analysis is a well-established research field performing it is still an "analytical challenge."…”

Section: Topical Reviewsmentioning

confidence: 99%

Atomic Spectrometry Update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2018

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

This is the ninth Atomic Spectrometry Update (ASU) to focus on advances in elemental speciation and covers a period of approximately 12 months from December 2015. This ASU review deals with all aspects of the analytical atomic spectrometry speciation methods developed for: the determination of oxidation states; organometallic compounds; coordination compounds; metal and heteroatom-containing biomolecules, including metalloproteins, proteins, peptides and amino acids; and the use of metal-tagging to facilitate detection via atomic spectrometry. The review does not cover fractionation, which is sometimes termed operationally defined speciation. As with all ASU reviews the focus of the research reviewed includes those methods that incorporate atomic spectrometry as the measurement technique. However, because speciation analysis is inherently focused on the relationship between the metal(loid) atom and the organic moiety it is bound to, or incorporated within, atomic spectrometry alone cannot be the sole analytical approach of interest. For this reason molecular detection techniques are also included where they have provided a complementary approach to speciation analysis. As in previous years, As and Se speciation continues to dominate the current literature, with reports of the speciation of Cr and Hg also increasing, and there are an ever rising number of publications concerning the analysis of 'biomolecules'. Whilst most of this work is still the preserve of the research field some methods are now approaching the robustness and rapidity for use in the clinical setting.

show abstract

“…A large variety of non-chromatographic systems for separation and preconcentration of Cr(VI), mainly in natural and waste water samples have been described [14][15][16]. During the recent years ionic liquids tend to be one of the most promising green extractants and due to their unique properties, they reasonably find numerous analytical applications in different extraction procedures [17,18].…”

Section: Introductionmentioning

confidence: 99%

New composite sorbent for speciation analysis of soluble chromium in textiles

et al. 2019

View full text Add to dashboard Cite

Micrometer-sized silica spheres coated with a layer of Cr(VI) imprinted methylimidazolium ionic liquid were synthesized and applied for fast and selective determination of leachable Cr(VI) in fabrics. The silica cores were synthesized via original seeded growth procedure. Formation of ionic liquid layer onto their surface was simultaneously combined with CrO42− imprinting. The sorbent characterization was accomplished by SEM/ EDS, elemental microanalysis, and thermogravimetry. Excellent separation of Cr(VI) from Cr(III) was achieved at pH 3 for 10 minutes in a batch mode. A mixture of ascorbic and nitric acids was found to be the most efficient eluent. The adsorption equilibrium data were best represented by the Langmuir isotherm model. The sorbent was applied for quantification of Cr(VI) in textile extracts in accordance with international standard ISO105-E04. The analytical procedure developed (LOD 0.015 μg/g (measured by ETAAS), RSD 3−8% for concentration levels of Cr(VI) 0.015-0.5 μg/g) completely meets the requirements of the international textile regulations.

show abstract

Nanomaterials for elemental speciation

Abstract: Various types of nanomaterials such as magnetic nanoparticles, carbon nanostructures, metal oxides, noble metal nanoparticles, and ion imprinted polymers have been incorporated in new innovative approaches for speciation analysis.

Cited by 32 publications

References 162 publications

Advances in the Determination of Xenobiotics in Foods

Advances in the Determination of Xenobiotics in Foods

Atomic Spectrometry Update: review of advances in elemental speciation

New composite sorbent for speciation analysis of soluble chromium in textiles

Contact Info

Product

Resources

About