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Reffas H, Youcef MH, Benabdallah T. Investigation of europium(III) uptake from highly sulphate solution via cloud point extraction by mono-Schiff base combined with Triton X-100. ENVIRONMENTAL TECHNOLOGY 2024:1-11. [PMID: 38972167 DOI: 10.1080/09593330.2024.2369275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 04/28/2024] [Indexed: 07/09/2024]
Abstract
Owing to its unique physico-chemical properties, europium is one of the most precious and sought-after rare earth elements in the field of high technology. The major economic and commercial importance of such an element, combined with the pollution risks associated with its intensive use, require the development of efficient and eco-compatible recovery and recycling processes. This study focuses on the recovery of europium from highly saline sulphate media (0.5 mol/L) using an environmentally friendly two-phase aqueous extraction technique (known as cloud point extraction (CPE)), using 2((phenylimino)methyl)phenol mono-Schiff base (HPIMP) as the extractant and Triton X-100 as the non-ionic surfactant. The influence of key experimental parameters such as pH, extractant concentration, surfactant concentration and separation temperature on the europium extraction process was systematically studied and optimized. Under optimum experimental conditions, a quasi-quantitative extraction with a minimal volume fraction of surfactant-rich phase (φs = 0.025), and concentration factor of (CF = 38) was achieved at pH 9.8, in one stage. The analysis of the extraction data revealed that the CPE of europium(III) takes place by a cation exchange-solvation mechanism. The stoichiometry of the complex extracted into the surfactant-rich phase was ascertained to have a composition of 1:2 [Eu:HPIMP] with the slope analysis method. A higher extraction constant was obtained for CPE compared with conventional solvent extraction, confirming the feasibility and usefulness of CPE for Eu(III) recovery. On the other hand, this new HPIMP/Triton X-100 chelating system showed superior extractability for Eu(III) in the CPE process relative to other systems reported previously.
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Affiliation(s)
- Hasnia Reffas
- Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM), Département de Génie Chimique, Faculté de Chimie, Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf (USTOMB), EL-M'naouer, Oran, Algérie
| | - Mohammed Hadj Youcef
- Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM), Département de Génie Chimique, Faculté de Chimie, Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf (USTOMB), EL-M'naouer, Oran, Algérie
| | - Tayeb Benabdallah
- Laboratoire de Chimie et d'Electrochimie des Complexes Métalliques (LCECM), Département de Génie Chimique, Faculté de Chimie, Université des Sciences et de la Technologie d'Oran-Mohamed Boudiaf (USTOMB), EL-M'naouer, Oran, Algérie
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Arputharaj E, Singh S, Huang YH, Wu YR, Perumal K, Periyasami G, Chao YY, Dahms HU, Huang YL. Switchable metal extractant integrated miniaturized 3D-printed device: A semi-online multi-metal separation system for matrix-free ICP-MS analysis. Anal Chim Acta 2024; 1310:342672. [PMID: 38811131 DOI: 10.1016/j.aca.2024.342672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 04/21/2024] [Accepted: 05/01/2024] [Indexed: 05/31/2024]
Abstract
BACKGROUND This study tackles the critical challenges in metal analysis by presenting an innovative miniaturized metal extraction device prototype. This device features a functional nanocomposite (FNC) enhanced 3D-printed polylactic acid (PLA) metal extractant (FNC@3D PLA). The research is motivated by the constraints of traditional solid-phase extraction (SPE) methods, specifically their limitations in handling competitive metal ion environments and matrix interference during inductively coupled plasma mass spectrometry (ICP-MS) analysis. The designed prototype aims to overcome these challenges and enhance the extraction efficiency of diverse metals. RESULTS The FNC, designed to incorporate various functional groups critical for metal ion extraction efficiency, was meticulously engineered through the reaction of acid-treated and delaminated graphitic carbon nitride nanosheets (Thiol-gCN NSs) with 3-mercaptopropyl trimethoxysilane (MPTMS). The competitive metal ion extraction efficiency of FNC@3D PLA was demonstrated, showcasing notable limit of detection values of 3.2 ± 0.7 ng mL-1 and 8.57 ± 3.05 ng mL-1 for Cu and Ag, respectively. Furthermore, the miniaturized 3D-printed metal-preconcentration setup incorporating FNC@3D PLA exhibited favorable intraday relative standard deviation (RSD) percentage (%) values ranging from 1.23 to 8.6 for both Cu and Ag. Interday RSD % between 1.41 and 8.14 were observed under spiked real urine sample conditions. The sustainability and robustness of the proposed approach were underscored by substantial recovery % values exhibited by FNC@3D PLA, even after eight consecutive regeneration processes. SIGNIFICANCE This study significantly contributes to the advancement of analytical methodologies by providing a reliable and efficient platform for metal extraction and preconcentration in practical metal analysis applications. Developed FNC@3D PLA system demonstrates its potential to address the challenges associated with SPE in metal analysis, especially in complex sample matrices. We believe implications of this research can be extended to various fields, from environmental monitoring to clinical diagnostics, where accurate and reliable metal analysis is paramount.
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Affiliation(s)
- Emmanuvel Arputharaj
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shivangi Singh
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Hui Huang
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - You-Rong Wu
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Karthikeyan Perumal
- Department of Chemistry and Biochemistry, The Ohio State University, 170A CBEC, 151 Woodruff Avenue, Columbus, Ohio 43210, USA
| | - Govindasami Periyasami
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh-11451, Saudi Arabia
| | - Yu-Ying Chao
- Department of Public Health, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center for Precision Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hans-Uwe Dahms
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center for Precision Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan.
| | - Yeou-Lih Huang
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center for Precision Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; College of Professional Studies, National Pingtung University of Science and Technology, Pingtung, Taiwan; Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, Taiwan.
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Mortada WI, Awad AA, El-Defrawy MM, Khalifa ME. Air-assisted cloud point extraction coupled with inductively coupled plasma optical emission spectroscopy for determination of samarium in environmental samples. ANAL SCI 2022; 38:1489-1495. [DOI: 10.1007/s44211-022-00181-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/20/2022] [Indexed: 11/01/2022]
Abstract
AbstractFor the first time, air-assisted cloud point extraction (AACPE) was presented to preconcentrate metal ions. The procedure was conjugated with inductively coupled plasma-optical emission spectroscopy for determination of samarium. In this procedure, samarium ions were complexed with aluminon and extracted into Triton X-114 in the presence of potassium iodide. The mixture was repeatedly sucked and dispersed with a syringe (three times) to create cloud solution. Experimental factors that affect the extraction competence of the AACPE procedure, such as pH, amount of aluminon and Triton X-114, salt addition, number of suction/injection cycles, and centrifugation rate and time, have been investigated and optimized. A linear calibration curve from 0.2 to 200.0 μg L−1 with enrichment factor and detection limit of 102 and 0.06 μg L−1, respectively, was established under the optimum experimental conditions. The approach was used to determine samarium in wastewater and rock samples, with recoveries ranging from 98% to 99%.
Graphical abstract
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4
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A review on extraction, preconcentration and speciation of metal ions by sustainable cloud point extraction. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107150] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Pereira Neves H, Max Dias Ferreira G, Max Dias Ferreira G, Rodrigues de Lemos L, Dias Rodrigues G, Albis Leão V, Barbosa Mageste A. Liquid-liquid extraction of rare earth elements using systems that are more environmentally friendly: Advances, challenges and perspectives. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120064] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Shi S, Wu H, Zhang L, Xiong P, Chen D, Chen L, Xu J, Qin Z, Liao J. Cloud point extraction associated with differential pulse voltammetry: preconcentration and determination of trace uranyl in natural water. Analyst 2022; 147:645-651. [DOI: 10.1039/d1an02034j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A procedure for the electroanalytical determination of uranyl ions pre-concentrated from natural water by cloud point extraction (CPE) is developed in this study.
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Affiliation(s)
- Siwei Shi
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Haoxi Wu
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Ling Zhang
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Penghui Xiong
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Denglei Chen
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Lumin Chen
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Jie Xu
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Zhen Qin
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
| | - Junsheng Liao
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P. R. China
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7
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Akl ZF. A new approach for efficient preconcentration of uranyl ions using binary catanionic surfactant system. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01752-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Elnagar MM, Hashem MA, Hassanien MM, Ismail MA. pH-controlled mixed micelle cloud point extraction for selective removal of trace levels of iron from titanium concentrates. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118534] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Isaeva YI, Elokhov AM, Denisova SA, Kudryashova OS. Phase Equlibria and Extraction of Metal Ions in Systems Based on Mixtures of Alkylbenzyldimethylammonium Chloride and Oxyethylated Nonylphenols. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420070158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Hashem MA, Elnagar MM, Kenawy IM, Ismail MA. Synthesis and application of hydrazono-imidazoline modified cellulose for selective separation of precious metals from geological samples. Carbohydr Polym 2020; 237:116177. [PMID: 32241404 DOI: 10.1016/j.carbpol.2020.116177] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/11/2020] [Accepted: 03/13/2020] [Indexed: 12/12/2022]
Abstract
A new hydrazono-imidazoline modified cellulose (HIMC) was synthesized for selective recovery of Pt(IV), Pd(II) and Au(III) from geological samples. Cellulose was oxidized by periodate and was further functionalized with hydrazono-imidazoline moieties to afford N-donor chelating fibers. Scanning electron microscopy (SEM), Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N2 physisorption, elemental analysis, and energy-dispersive X-ray spectroscopy (EDX) were used for characterization. Introducing the hydrazono-imidazoline groups at the surface of cellulose fibers did not alert their ordered structure and crystallinity, as indicated by XRD and SEM results. Factors affecting the adsorption were systematically investigated. Under the optimized conditions, the HIMC sorbent exhibited high adsorption capacities of 105, 88 and 75 mg g-1 for Pt(IV), Pd(II) and Au(III), respectively. Besides, the metal ion adsorption process fitted by pseudo-second-order kinetic model and Langmuir adsorption isotherm. These results highlight the applicability of this carbohydrate-based sorbent for the selective recovery of precious metals from various matrices.
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Affiliation(s)
- Mohamed A Hashem
- Department of Chemistry, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt.
| | - Mohamed M Elnagar
- National Research Centre, Inorganic Chemistry Department, Tahrir St, Dokki, 12622 Giza, Egypt
| | - Ibrahim M Kenawy
- Department of Chemistry, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt
| | - Mohamed A Ismail
- Department of Chemistry, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt.
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11
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Khalifa ME, Mortada WI, El-defrawy MM, Awad AA. Selective separation of gadolinium from a series of f-block elements by cloud point extraction and its application for analysis of real samples. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104214] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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12
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Li FK, Gong AJ, Qiu LN, Zhang WW, Li JR, Liu Y, Li JD, Gao G, Yuan XT. Determination of trace rare earth elements in fruits by microwave digestion coupled with inductively coupled plasma optical emission spectrometry. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Liang H, Chen Q, Xu C, Shen X. Selective cloud point extraction of uranium from thorium and lanthanides using Cyanex 301 as extractant. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.08.071] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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A Green and Efficient Method for the Preconcentration and Determination of Gallic Acid, Bergenin, Quercitrin, and Embelin from Ardisia japonica Using Nononic Surfactant Genapol X-080 as the Extraction Solvent. Int J Anal Chem 2018; 2018:1707853. [PMID: 29487621 PMCID: PMC5816874 DOI: 10.1155/2018/1707853] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 12/15/2017] [Accepted: 12/28/2017] [Indexed: 12/22/2022] Open
Abstract
A simple cloud point preconcentration method was developed and validated for the determination of gallic acid, bergenin, quercitrin, and embelin in Ardisia japonica by high-performance liquid chromatography (HPLC) using ultrasonic assisted micellar extraction. Nonionic surfactant Genapol X-080 was selected as the extraction solvent. The effects of various experimental conditions such as the type and concentration of surfactant and salt, temperature, and solution pH on the extraction of these components were studied to optimize the conditions of Ardisia japonica. The solution was incubated in a thermostatic water bath at 60°C for 10 min, and 35% NaH2PO4 (w/v) was added to the solution to promote the phase separation and increase the preconcentration factor. The intraday and interday precision (RSD) were both below 5.0% and the limits of detection (LOD) for the analytes were between 10 and 20 ng·mL-1. The proposed method provides a simple, efficient, and organic solvent-free method to analyze gallic acid, bergenin, quercitrin, and embelin for the quality control of Ardisia japonica.
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Mortada WI, Kenawy IMM, Abdel-Rhman MH, El-Gamal GG, Moalla SMN. A new thiourea derivative [2-(3-ethylthioureido)benzoic acid] for cloud point extraction of some trace metals in water, biological and food samples. J Trace Elem Med Biol 2017; 44:266-273. [PMID: 28965586 DOI: 10.1016/j.jtemb.2017.09.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/30/2017] [Accepted: 09/01/2017] [Indexed: 11/27/2022]
Abstract
2-(3-Ethylthioureido)benzoic acid was prepared and characterized by electronic spectrum, elemental analysis, Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance spectrum and mass spectrum. The produced ligand was applied for the preconcentrative of Fe3+, Co2+, Cu2+ and Zn2+ in aqueous samples by cloud point extraction methodology. Triton X-114 was used as extractant. Experimental parameters that may affect the extraction process were examined and optimized; such as pH, ligand and triton concentrations, type of diluting solvent, extraction temperature and ionic strength. The calibration curves were linear upto 500μgL-1 for Fe3+, Cu2+ and Zn2+ and upto 200μgL-1 for Co2+. The achieved detection limits were 1.5, 0.23, 0.71 and 0.35μgL-1 for Fe3+, Co2+, Cu2+ and Zn2+ respectively. The accuracy was established by analysis of certified reference materials (Seronorm whole blood L2 and ZCS ZC85006 Tomato). The proposed procedure was used for preconcentration of these metal ions in water, biological and food samples prior to their determination by flame atomic absorption spectrometry.
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Affiliation(s)
- W I Mortada
- Urology and Nephrology Center, Mansoura University, Mansoura, Egypt.
| | - I M M Kenawy
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - M H Abdel-Rhman
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - G G El-Gamal
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - S M N Moalla
- Chemistry Department, Faculty of Science, Port Said University, Port Said, Egypt
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Li F, Gong A, Qiu L, Zhang W, Li J, Liu Y, Liu Y, Yuan H. Simultaneous determination of trace rare-earth elements in simulated water samples using ICP-OES with TODGA extraction/back-extraction. PLoS One 2017; 12:e0185302. [PMID: 28945788 PMCID: PMC5612762 DOI: 10.1371/journal.pone.0185302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 09/11/2017] [Indexed: 11/18/2022] Open
Abstract
The determination of trace rare-earth elements (REEs) can be used for the assessment of environmental pollution, and is of great significance to the study of toxicity and toxicology in animals and plants. N, N, N', N'-tetraoctyl diglycolamide (TODGA) is an environmental friendly extractant that is highly selective to REEs. In this study, an analytical method was developed for the simultaneous determination of 16 trace REEs in simulated water samples by inductively coupled plasma optical emission spectroscopy (ICP-OES). With this method, TODGA was used as the extractant to perform the liquid-liquid extraction (LLE) sample pretreatment procedure. All 16 REEs were extracted from a 3 M nitric acid medium into an organic phase by a 0.025 M TODGA petroleum ether solution. A 0.03 M ethylenediaminetetraacetic acid disodium salt (EDTA) solution was used for back-extraction to strip the REEs from the organic phase into the aqueous phase. The aqueous phase was concentrated using a vacuum rotary evaporator and the concentration of the 16 REEs was detected by ICP-OES. Under the optimum experimental conditions, the limits of detection (3σ, n = 7) for the REEs ranged from 0.0405 ng mL-1 (Nd) to 0.5038 ng mL-1 (Ho). The relative standard deviations (c = 100 ng mL-1, n = 7) were from 0.5% (Eu) to 4.0% (Tm) with a linear range of 4-1000 ng mL-1 (R2 > 0.999). The recoveries of 16 REEs ranged from 95% to 106%. The LLE-ICP-OES method established in this study has the advantages of simple operation, low detection limits, fast analysis speed and the ability to simultaneously determine 16 REEs, thereby acting as a viable alternative for the simultaneous detection of trace amounts of REEs in water samples.
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Affiliation(s)
- FuKai Li
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - AiJun Gong
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - LiNa Qiu
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - WeiWei Zhang
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - JingRui Li
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - Yu Liu
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - YuNing Liu
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
| | - HuiTing Yuan
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, P R, China
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Varbanova EK, Angelov PA, Stefanova VM. Study of 3-Ethylamino-but-2-enoic acid phenylamide as a new ligand for preconcentration of lanthanides from aqueous media by liquid-liquid extraction prior to ICP-MS analysis. Talanta 2016; 160:389-399. [DOI: 10.1016/j.talanta.2016.07.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 07/23/2016] [Accepted: 07/25/2016] [Indexed: 11/29/2022]
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