Selective extraction and determination of Cr(VI) in food samples based on tandem electromembrane extraction followed by electrothermal atomic absorption spectrometry

Goodarzi, Leila; Bayatloo, Mohammad Reza; Chalavi, Soheila; Nojavan, Saeed; Rahmani, Turaj; Azimi, Seyedeh Bahareh

doi:10.1016/j.foodchem.2021.131442

Cited by 25 publications

(6 citation statements)

References 40 publications

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“…In this case, the interaction of this factor with the electric potential showed a significant, but minor and negative, influence on the enrichment factor. In this way, Goodarzi et al observed that the presence of Aliquat-336 as a carrier improve the Cr extraction by EME, but the extraction decreased as Aliquat-336 concentration increased higher than 2.5% w / v [ 38 ]. They attributed this behaviour to the increase in the density of the organic phase, and the decrease of the electric resistance of SLM, allowing an increase in the electric current through the extraction system and reducing the stability of the EME.…”

Section: Resultsmentioning

confidence: 99%

Analytical Performance of Electromembranes as a Tool for Nanoconcentrations of Silver in Waters

2022

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Electromembranes increase the efficiency of metal transport in liquid-phase microextraction systems by applying an electric potential, which accelerates the transport. Nevertheless, to get high extraction percentages in short extraction times it is necessary to take into account a great variety of factors, and multivariate optimization techniques are the best alternative to determine the most influential variables and to optimize the extraction process. In this work, a fractional factorial design was applied to determine the most influential variables in the extraction of silver by electromembranes. Thus, the effect of tri-isobutylphosphine sulphide (Cyanex 471x) concentration in the organic solution, sodium thiosulphate concentration in the acceptor solution, nitrate concentration in the sample solution, extraction time, stirring rate and electric potential on the enrichment factor were studied. Once the most important variables were selected, a small composite design (Draper–Lin) was used to obtain their optimal values to maximize the enrichment factor. Under these conditions, an experimental enrichment factor of 49.91 ± 3.95 was achieved after 22 min. Finally, the effect of saline matrix on the enrichment factor was tested and the optimized system was successfully applied to analyse silver concentrations at ultratrace levels, within the range of 7–29 ng·L−1 in different real seawater samples.

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Section: Resultsmentioning

confidence: 99%

Analytical Performance of Electromembranes as a Tool for Nanoconcentrations of Silver in Waters

2022

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“…Cr 6+ is another highly toxic heavy metal ion that can contaminate food and water, posing significant health risks (Goodarzi et al., 2022; Yang et al., 2020). Exposure to Cr 6+ can lead to symptoms such as abdominal pain, vomiting, dermatitis, and even severe diseases like respiratory tract cancer and intestinal tumors (Liu, Wang, et al., 2021; Wang, Gong, et al., 2022).…”

Section: Applications In the Detection Of Food Contaminantsmentioning

confidence: 99%

Optical nanosensors based on noble metal nanoclusters for detecting food contaminants: A review

Pang,

Pi,

Zhao

et al. 2024

Comp Rev Food Sci Food Safe

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Food contaminants present a significant threat to public health. In response to escalating global concerns regarding food safety, there is a growing demand for straightforward, rapid, and sensitive detection technologies. Noble metal nanoclusters (NMNCs) have garnered considerable attention due to their superior attributes compared to other optical materials. These attributes include high catalytic activity, excellent biocompatibility, and outstanding photoluminescence properties. These features render NMNCs promising candidates for crafting nanosensors for food contaminant detection, offering the potential for the development of uncomplicated, swift, sensitive, user‐friendly, and cost‐effective detection approaches. This review investigates optical nanosensors based on NMNCs, including the synthesis methodologies of NMNCs, sensing strategies, and their applications in detecting food contaminants. Furthermore, it involves a comparative assessment of the applications of NMNCs in optical sensing and their performance. Ultimately, this paper imparts fresh perspectives on the forthcoming challenges. Hitherto, optical (particularly fluorescent) nanosensors founded on NMNCs have demonstrated exceptional sensing capabilities in the realm of food contaminant detection. To enhance sensing performance, future research should prioritize atomically precise NMNCs synthesis, augmentation of catalytic activity and optical properties, development of high‐throughput and multimode sensing, integration of NMNCs with microfluidic devices, and the optimization of NMNCs storage, shelf life, and transportation conditions.

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“…A pre-concentration procedure, based on tandem electromembrane extractions has been devised for the determination of Cr VI in food (milk powder, fish tissue and basil) by ETAAS. 62 Samples (1.0 g) were first dry-ashed (550 °C for 4–5 h), dissolved in 100 mL of diluted HCl and the pH adjusted to 5.0. An 8 mL subsample was subject to the first electromembrane procedure, in which species migrated across a supported liquid membrane (1-octanol containing Aliquat-336 as carrier) into 40 μL of acceptor solution that acted, following acidification, as the donor solution for the second procedure, in which species migrated across 1 μL of the same organic solvent, acting a free liquid membrane, into 10 μL of acceptor solution.…”

Section: Sample Collection and Preparationmentioning

confidence: 99%

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

Patriarca

Barlow

Cross³

et al. 2023

J. Anal. At. Spectrom.

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Selective extraction and determination of Cr(VI) in food samples based on tandem electromembrane extraction followed by electrothermal atomic absorption spectrometry

Cited by 25 publications

References 40 publications

Analytical Performance of Electromembranes as a Tool for Nanoconcentrations of Silver in Waters

Analytical Performance of Electromembranes as a Tool for Nanoconcentrations of Silver in Waters

Optical nanosensors based on noble metal nanoclusters for detecting food contaminants: A review

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

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