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Musielak M, Musielak E, Sitko R. Ultrasensitive determination of selenium in food samples and its speciation in water and beverages using thiosemicarbazide-incorporated graphene and total-reflection X-ray fluorescence spectrometry. Food Chem 2024; 439:138156. [PMID: 38064828 DOI: 10.1016/j.foodchem.2023.138156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/18/2023] [Accepted: 12/04/2023] [Indexed: 01/10/2024]
Abstract
The paper presents a new analytical procedure for the determination and speciation of trace and ultratrace selenium in water, beverages, seafood, milk, and vegetables. The developed method is based on the dispersive micro-solid phase extraction with the use of new thiosemicarbazide-incorporated graphene as a solid sorbent, in combination of the total-reflection X-ray fluorescence spectrometry (TXRF). As a result, we have created an auspicious analytical tool for fast and sensitive analysis of samples with a complex matrix. Regardless of the specimen type, the method is characterized by a very low detection limit of 1.7 pg mL-1 and high precision. The developed strategy allowed us to solve common problems associated with selenium loss during the sample preparation for the TXRF measurement and also improve its performance toward the analysis of beverages and high saline/solid samples, which may even be impossible to perform using standard sample preparation procedures for a TXRF measurement.
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Affiliation(s)
- Marcin Musielak
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland.
| | - Ewelina Musielak
- Łukasiewicz Research Network-Institute of Non-Ferrous Metals, Sowińskiego 5, 44-100 Gliwice, Poland
| | - Rafal Sitko
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
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Samejo S, Baig JA, Kazi TG, Afridi HI, Hol A, Dahshan A, Akhtar K, Solangi SA, Perveen S, Hussain S. The green synthesis of magnesium oxide nanocomposite-based solid phase for the extraction of arsenic, cadmium, and lead from drinking water. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:3863-3873. [PMID: 37497642 DOI: 10.1039/d3ay00819c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Solid-phase extraction (SPE) has attracted the attention of scientists because it can increase the selectivity and sensitivity measurements of analytes. Therefore, this study is designed to synthesise magnesium oxide nanoparticles (D-MgO-NPs) by an eco-friendly method using biogenic sources Duranta erecta followed by fabricating its chitosan-based polymeric composite (D-MgO-NC) for the SPE of heavy metals (HMs), i.e., arsenic (As), cadmium (Cd), and lead (Pb) from drinking water. Various analytical techniques were used for the surface characterization of D-MgO-NPs and D-MgO-NC. FTIR findings confirmed the formation of D-MgO-NC based on MgO association with the -OH/-NH2 of the chitosan. D-MgO-NC showed the smallest size of particles with rough surface morphology, followed by the crystalline cubic structure of MgO in its nanoparticle and composites. The synthesised D-MgO-NC was used as an adsorbent for the SPE of HMs from contaminated water, followed by their detection by atomic absorption spectrometry. Various experimental parameters, including pH, flow rate, the concentration of HMs, eluent composition, and volume, were optimised for the preconcentration of HMs. The limits of detection for As, Cd, and Pb of the proposed D-MgO-NC-based SPE method were found to be 0.008, 0.006, and 0.012 μm L-1, respectively. The proposed method has an enrichment factor and relative standard deviation of >200 and <5.0%, respectively. The synthesised D-MgO-NC-based SPE method was successfully applied for the quantitative detection of As, Cd, and Pb in groundwater samples, which were found in the range of 18.3 to 15.2, 3.20 to 2.49, and 8.20 to 6.40 μg L-1, respectively.
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Affiliation(s)
- Suraya Samejo
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
- Chemistry Department, Pamukkale University, Denizli 20017, Turkey.
| | - Jameel Ahmed Baig
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
- Chemistry Department, Pamukkale University, Denizli 20017, Turkey.
| | - Tasneem Gul Kazi
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Hassan Imran Afridi
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Aysen Hol
- Chemistry Department, Pamukkale University, Denizli 20017, Turkey.
| | - Alaa Dahshan
- Department of Physics, Faculty of Science, King Khalid University, P. O. Box 9004, Abha, Saudi Arabia.
| | - Khalil Akhtar
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Shakoor Ahmed Solangi
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Saima Perveen
- Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Sajjad Hussain
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, 05422, Pakistan.
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