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Dakova I, Yordanova T, Karadjova I. Polymeric Materials in Speciation Analysis Based on Solid-Phase Extraction. Molecules 2023; 29:187. [PMID: 38202769 PMCID: PMC10780835 DOI: 10.3390/molecules29010187] [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: 11/14/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
Speciation analysis is a relevant topic since the (eco)toxicity, bioavailability, bio (geo)chemical cycles, and mobility of a given element depend on its chemical forms (oxidation state, organic ligands, etc.). The reliability of analytical results for chemical species of elements depends mostly on the maintaining of their stability during the sample pretreatment step and on the selectivity of further separation step. Solid-phase extraction (SPE) is a matter of choice as the most suitable and widely used procedure for both enrichment of chemical species of elements and their separation. The features of sorbent material are of great importance to ensure extraction efficiency from one side and selectivity from the other side of the SPE procedure. This review presents an update on the application of polymeric materials in solid-phase extraction used in nonchromatographic methods for speciation analysis.
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Affiliation(s)
| | | | - Irina Karadjova
- Faculty of Chemistry and Pharmacy, University of Sofia “St. Kliment Ohridski”, 1, James. Bourchier Blvd.1, 1164 Sofia, Bulgaria; (I.D.); (T.Y.)
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2
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Chen JR, Tsai WH, Su CK. TiO 2 nanoparticle-Coated 3D-Printed porous monoliths enabling highly sensitive speciation of inorganic Cr, As, and Se. Anal Chim Acta 2023; 1271:341489. [PMID: 37328240 DOI: 10.1016/j.aca.2023.341489] [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: 03/24/2023] [Revised: 06/01/2023] [Accepted: 06/05/2023] [Indexed: 06/18/2023]
Abstract
Post-printing functionalization can enhance the functionality and applicability of analytical devices manufactured using three-dimensional printing (3DP) technologies. In this study we developed a post-printing foaming-assisted coating scheme-through respective treatments with a formic acid (30%, v/v) solution and a sodium bicarbonate (0.5%, w/v) solution incorporating titanium dioxide nanoparticles (TiO2 NPs; 1.0%, w/v)-for in situ fabrication of TiO2 NP-coated porous polyamide monoliths in 3D-printed solid phase extraction columns, thereby enhancing the extraction efficiencies of Cr(III), Cr(VI), As(III), As(V), Se(IV), and Se(VI) for speciation of inorganic Cr, As, and Se species in high-salt-content samples when using inductively coupled plasma mass spectrometry. After optimizing the experimental conditions, the 3D-printed solid phase extraction columns with the TiO2 NP-coated porous monoliths extracted these species with 5.0- to 21.9-fold enhancements, relative to those obtained with the uncoated monolith, with absolute extraction efficiencies ranging from 84.5 to 98.3% and method detection limits ranging from 0.7 to 32.3 ng L-1. We validated the reliability of this multi-elemental speciation method through determination of these species in four reference materials [CASS-4 (nearshore seawater), SLRS-5 (river water), 1643f (fresh water), and Seronorm Trace Elements Urine L-2 (human urine); relative errors between certified and measured concentrations: 5.6 to +4.0%] and spike analyses of seawater, river water, agriculture waste, and human urine samples (spike recoveries: 96-104%; relative standard deviations of these measured concentrations all below 4.3%). Our results demonstrate that post-printing functionalization has great potential for future applicability in 3DP-enabling analytical methods.
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Affiliation(s)
- Jyun-Ran Chen
- Department of Chemistry, National Chung Hsing University, Taichung City, 402, Taiwan, ROC
| | - Wen-Hsiu Tsai
- Department of Chemistry, National Chung Hsing University, Taichung City, 402, Taiwan, ROC
| | - Cheng-Kuan Su
- Department of Chemistry, National Chung Hsing University, Taichung City, 402, Taiwan, ROC.
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3
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Magnetic solid phase extraction as a nonchromatographic method for the quantification of ultratrace inorganic arsenic in rice by inductively coupled plasma-optical emission spectrometry (ICP OES). Food Chem 2023; 412:135461. [PMID: 36731230 DOI: 10.1016/j.foodchem.2023.135461] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 01/04/2023] [Accepted: 01/09/2023] [Indexed: 01/18/2023]
Abstract
An alternative analytical method was developed for the quantification of inorganic arsenic (iAs) in rice by ICP OES. Iron nanoparticles modified with an organophosphorus compound were used as the solid phase for MSPE of iAs from the plant matrix. The MSPE procedure was performed using 4 mL of a buffer solution with pH 4.0, 20 mg of the nanomaterial, and a 15-min extraction time. The total As (tAs) by ICP OES was also quantified using the same MSPE procedure after solubilization of the samples by a block digester. The accuracy of tAs and iAs quantification was verified using CRM NIST 1568b (97 % and 101 % recovery, respectively). The precision (RSD < 15 %) and LOD and LOQ (1.08 and 3.70 µg kg-1, respectively) of the proposed method were satisfactory. The rice samples had tAs contents between 0.090 and 0.295 mg kg-1 and iAs mass fractions between 0.055 and 0.109 mg kg-1.
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Preconcentration and speciation analysis of mercury: 3D printed metal scavenger-based solid-phase extraction followed by analysis with inductively coupled plasma mass spectrometry. Talanta 2021; 240:123163. [PMID: 34972065 DOI: 10.1016/j.talanta.2021.123163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/18/2021] [Accepted: 12/20/2021] [Indexed: 11/20/2022]
Abstract
A selective method for preconcentration and determination of methylmercury (MeHg) and inorganic mercury (iHg) in natural water samples at the ng L-1 level has been developed. The method involves adsorption of Hg species into a 3D printed metal scavenger and sequential elution with acidic thiourea solutions before ICP-MS determination. Experimental parameters affecting the preconcentration of MeHg and iHg such as the sample matrix, effect of the flow rate on adsorption, eluent composition, and elution mode have been studied in detail. The obtained method detection limits, considering the preconcentration factors of 42 and 93, were found to be 0.05 ng L-1 and 0.08 ng L-1 for MeHg and iHg, respectively. The accuracy of the method was assessed with a certified groundwater reference material ERM-CA615 (certified total iHg concentration 37 ± 4 ng L-1). The determined MeHg concentration was below MDL while iHg concentration was determined to be 41.2 ± 0.5 ng L-1. Both MeHg and iHg were also spiked to natural water samples at 5 ng L-1 concentration and favorable spiking recoveries of 88-97% were obtained. The speciation procedure was successfully applied to two lake water samples where MeHg and iHg concentrations ranged from 0.18 to 0.24 ng L-1 and 0.50-0.62 ng L-1, respectively. The results obtained demonstrate that the developed 3D printed metal scavenger-based method for preconcentration and speciation of Hg is simple and sensitive for the determination of Hg species at an ultra-trace level in water samples.
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Preparation of environmental samples for chemical speciation of metal/metalloids: A review of extraction techniques. Talanta 2021; 226:122119. [PMID: 33676674 DOI: 10.1016/j.talanta.2021.122119] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 11/20/2022]
Abstract
Chemical speciation is a relevant topic in environmental chemistry since the (eco)toxicity, bio (geo)chemical cycles, and mobility of a given element depend on its chemical forms (oxidation state, organic ligands, etc.). Maintaining the chemical stability of the species and avoiding equilibrium disruptions during the sample treatment is one of the biggest challenges in chemical speciation, especially in environmental matrices where the level of concomitants/interferents is normally high. To achieve this task, strategies based on chemical properties of the species can be carried out and pre-concentration techniques are often needed due to the low concentration ranges of many species (μg L-1 - ng L-1). Due to the significance of the topic and the lack of reviews dealing with sample preparation of metal (loid)s (usually, sample preparation reviews focus on the total metal content), this work is presented. This review gives an up-to-date overview of the most common sample preparation techniques for environmental samples (water, soil, and sediments), with a focus on speciation of metal/metalloids and determination by spectrometric techniques. Description of the methods is given, and the most recent applications (last 10 years) are presented.
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da Silva FLF, Neto DMA, de Menezes FL, Sa IP, de Higuera JM, Fechine PBA, da Costa LS, Nogueira ARA, Lopes GS, Matos WO. Non-chromatographic arsenic speciation analyses in wild shrimp (Farfantepenaeus brasiliensis) using functionalized magnetic iron-nanoparticles. Food Chem 2020; 345:128781. [PMID: 33601653 DOI: 10.1016/j.foodchem.2020.128781] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/11/2020] [Accepted: 11/29/2020] [Indexed: 11/26/2022]
Abstract
A new iron-magnetic nanomaterial functionalized with organophosphorus compound was used as solid-phase for arsenic speciation analysis in seafood samples by ICP-MS. The procedure was optimized using chemometric tools and the variables pH = 4.0, 15 min extraction time, and 20 mg of mass of material were obtained as the optimum point. The inorganic arsenic (iAs) extracted using nanoparticles presented concentrations between 20 and 100 µg kg-1 in the evaluated samples. The method was validated for accuracy using CRMs DOLT-5 and DORM-4. It was possible to reuse the same magnetic nanomaterial for 6 successive cycles, and we obtained a detection limit of 16.4 ng kg-1. The proposed method is suitable for the use of inorganic speciation of As, presenting good accuracy, precision, relatively low cost, and acquittance to green chemistry principles.
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Affiliation(s)
- Francisco L F da Silva
- Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60455-760 Fortaleza, CE, Brazil
| | - Davino M Andrade Neto
- Grupo de Química dos Materiais (GQMat), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60455-760 Fortaleza, CE, Brazil; Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE) - Campus Camocim, 62400-000 Camocim, CE, Brazil
| | - Fernando L de Menezes
- Grupo de Química dos Materiais (GQMat), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60455-760 Fortaleza, CE, Brazil
| | - Ivero P Sa
- Grupo de Análise Instrumental Aplicada (GAIA), Departamento de Química, Universidade Federal de São Carlos (UFSCar), PO Box 676, 13560-970 São Carlos, SP, Brazil; EMBRAPA Pecuária Sudeste, P.O. Box 339, 13560-970 São Carlos, SP, Brazil
| | - Julymar M de Higuera
- Grupo de Análise Instrumental Aplicada (GAIA), Departamento de Química, Universidade Federal de São Carlos (UFSCar), PO Box 676, 13560-970 São Carlos, SP, Brazil; EMBRAPA Pecuária Sudeste, P.O. Box 339, 13560-970 São Carlos, SP, Brazil
| | - Pierre B A Fechine
- Grupo de Química dos Materiais (GQMat), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60455-760 Fortaleza, CE, Brazil
| | - Luelc S da Costa
- Instituto de Química, Universidade Estadual de Campinas (UNICAMP), Campinas, SP 13083-970, Brazil
| | - Ana R A Nogueira
- EMBRAPA Pecuária Sudeste, P.O. Box 339, 13560-970 São Carlos, SP, Brazil
| | - Gisele S Lopes
- Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60455-760 Fortaleza, CE, Brazil
| | - Wladiana O Matos
- Laboratório de Estudos em Química Aplicada (LEQA), Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, Campus do Pici, 60455-760 Fortaleza, CE, Brazil.
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Jakavula S, Biata NR, Dimpe KM, Pakade VE, Nomngongo PN. A Critical Review on the Synthesis and Application of Ion-Imprinted Polymers for Selective Preconcentration, Speciation, Removal and Determination of Trace and Essential Metals from Different Matrices. Crit Rev Anal Chem 2020; 52:314-326. [PMID: 32723191 DOI: 10.1080/10408347.2020.1798210] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The presence of toxic trace metals and high concentrations of essential elements in the environment presents a serious threat to living organism. Various methods have been used for the detection, preconcentration and remediation of these metals from biological, environmental and food matrices. Owing to the complexicity of samples, methods with high selectivity have been used for detection, preconcentration and remediation of these trace metals. These methods are achieved by the use of ion-imprinted polymers (IIPs) due to their impressive properties such as selectivity, high extraction efficiency, speciation capability and reusability. Because of the increase of toxic trace and essential metals in the environment, IIPs have attracted great use in analytical chemistry. This review, provide a brief background on IIPs and polymerization method that are used for their preparation. Recent applications of IIPs as adsorbents for preconcentration, removal, speciation and electrochemical detection of trace and essential metal is also discussed.
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Affiliation(s)
- Silindokuhle Jakavula
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.,DSI/NRF SARChI Chair, Nanotechnology for Water, University of Johannesburg, Doornfontein, South Africa
| | - N Raphael Biata
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.,DSI/NRF SARChI Chair, Nanotechnology for Water, University of Johannesburg, Doornfontein, South Africa.,DSI/Mintek Nanotechnology Innovation Centre, University of Johannesburg, Doornfontein, South Africa
| | - K Mogolodi Dimpe
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa
| | - Vusumzi E Pakade
- Department of Chemistry, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Philiswa N Nomngongo
- Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa.,DSI/NRF SARChI Chair, Nanotechnology for Water, University of Johannesburg, Doornfontein, South Africa.,DSI/Mintek Nanotechnology Innovation Centre, University of Johannesburg, Doornfontein, South Africa
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Ferreira SL, Junior JBP, Almeida LC, Santos LB, Lemos VA, Novaes CG, de Oliveira OM, Queiroz AF. Strategies for inorganic speciation analysis employing spectrometric techniques–Review. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104402] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Pyrzynska K. Nanomaterials in speciation analysis of metals and metalloids. Talanta 2020; 212:120784. [PMID: 32113547 DOI: 10.1016/j.talanta.2020.120784] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/22/2020] [Accepted: 01/25/2020] [Indexed: 02/07/2023]
Abstract
Nanomaterials have draw extensive attention from the scientists in recent years mainly due to their unique and attractive thermal, mechanical and electronic properties, as well as high surface to volume ratio and the possibility for surface functionalization. Whereas mono functional nanomaterials providing a single function, the preparation of core/shell nanoparticles allows different properties to be combined in one material. Their properties have been extensively exploited in different extraction techniques to improve the efficiency of separation and preconcentration, analytical selectivity and method reliability. The aim of this paper is to provide an updated revision of the most important features and application of nanomaterials (metallic, silica, polymeric and carbon-based) for solid phase extraction and microextraction techniques in speciation analysis of some metals and metalloids (As, Cr, Sb, Se). Emphasis will be placed on the presentation of the most representative works published in the last five years (2015-2019).
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Affiliation(s)
- Krystyna Pyrzynska
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-93, Warsaw, Poland.
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Yabuki LN, Menegário AA, Gemeiner H, Rolisola AMC, Gastmans D, Williams PN. Residual biomass of coffee as a binding agent in diffusive gradients in thin-films technique for Cd, Cu, Ni, Pb and Zn measurement in waters. Talanta 2019; 205:120148. [DOI: 10.1016/j.talanta.2019.120148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 10/26/2022]
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Rutkowska M, Bajger-Nowak G, Kowalewska D, Bzoma S, Kalisińska E, Namieśnik J, Konieczka P. Methylmercury and total mercury content in soft tissues of two bird species wintering in the Baltic Sea near Gdansk, Poland. CHEMOSPHERE 2019; 219:140-147. [PMID: 30543952 DOI: 10.1016/j.chemosphere.2018.11.162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/14/2018] [Accepted: 11/25/2018] [Indexed: 06/09/2023]
Abstract
Of the various forms of Hg occurring in nature, (mono) methylmercury (MeHg) is an especially toxic form and practically all forms of Hg can be converted into MeHg as a result of natural processes. Total mercury (THg) and MeHg were determined in tissues of two piscivorous birds: razorbill Alca torda and black-throated loon Gavia arctica to provide baseline data on current mercury concentrations for liver, kidneys and pectoral muscle mercury concentrations of birds which winter on the south Baltic Sea coast. Intra and inter-specific comparisons were carried out. The study is conducted between winter and autumn and the distributions of mercury in tissues were compared with data in other studies. The following paper contains discussion of the results based on the statistical analysis and ecology aspect. The highest average Hg content was in the liver (loon ≈ 3.86 mg kg-1 dw; razorbill ≈ 1.57 mg kg-1 dw), then in the kidneys (loon ≈ 3.14 mg kg-1 dw; razorbill ≈ 1.53 mg kg-1 dw) and the lowest concentrations were in pectoral muscles (loon ≈ 1.97 mg kg-1 dw; razorbill ≈ 0.67 mg kg-1 dw).
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Affiliation(s)
- Małgorzata Rutkowska
- Gdańsk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland.
| | - Gabriela Bajger-Nowak
- Gdańsk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
| | - Diana Kowalewska
- Gdańsk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
| | - Szymon Bzoma
- Waterbird Research Group KULING, 34/7 Świerkowa Street, 81-526 Gdynia, Poland.
| | - Elżbieta Kalisińska
- Pomeranian Medical University, Department of Biology and Medical Parasitology, 72 Powstancow Wielkopolskich Street, 70-411 Szczecin, Poland.
| | - Jacek Namieśnik
- Gdańsk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
| | - Piotr Konieczka
- Gdańsk University of Technology, Faculty of Chemistry, Department of Analytical Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdańsk, Poland
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Ruiz-de-Cenzano M, Cava-Montesinos P, Cervera ML, de la Guardia M. Fast extraction methodologies for the determination of toxic arsenic in meat. Int J Food Sci Technol 2017. [DOI: 10.1111/ijfs.13538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manuela Ruiz-de-Cenzano
- Department of Analytical Chemistry; University of Valencia; 50 Dr. Moliner Street 46100 Burjassot Valencia Spain
| | - Patricia Cava-Montesinos
- Department of Analytical Chemistry; University of Valencia; 50 Dr. Moliner Street 46100 Burjassot Valencia Spain
| | - Maria Luisa Cervera
- Department of Analytical Chemistry; University of Valencia; 50 Dr. Moliner Street 46100 Burjassot Valencia Spain
| | - Miguel de la Guardia
- Department of Analytical Chemistry; University of Valencia; 50 Dr. Moliner Street 46100 Burjassot Valencia Spain
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Li Y, Guo W, Souders AK, Jin L, Ke Y, Guo Q, Hu S. Using citric acid stabilizing reagent to improve selective hydride generation-ICP-MS method for determination of Sb species in drinking water. RSC Adv 2016. [DOI: 10.1039/c6ra22257a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Citric acid as the stabilizing reagent to improve the selectivity of HG-ICP-MS for the direct speciation of Sb in drinking water.
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Affiliation(s)
- Yatai Li
- State Key Laboratory of Biogeology and Environmental Geology
- School of Earth Sciences
- China University of Geosciences
- Wuhan
- P. R. China
| | - Wei Guo
- State Key Laboratory of Biogeology and Environmental Geology
- School of Earth Sciences
- China University of Geosciences
- Wuhan
- P. R. China
| | | | - Lanlan Jin
- State Key Laboratory of Biogeology and Environmental Geology
- School of Earth Sciences
- China University of Geosciences
- Wuhan
- P. R. China
| | - Yuqiu Ke
- State Key Laboratory of Biogeology and Environmental Geology
- School of Earth Sciences
- China University of Geosciences
- Wuhan
- P. R. China
| | - Qinghai Guo
- State Key Laboratory of Biogeology and Environmental Geology
- School of Earth Sciences
- China University of Geosciences
- Wuhan
- P. R. China
| | - Shenghong Hu
- State Key Laboratory of Biogeology and Environmental Geology
- School of Earth Sciences
- China University of Geosciences
- Wuhan
- P. R. China
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The tandem analytical method of flow injection diode array spectrophotometry and flame atomic absorption spectrometry (FI-DAD(vis)-FAAS) in iron speciation studies using 1,10-phenanthroline complexes. Microchem J 2013. [DOI: 10.1016/j.microc.2013.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chito D, Galceran J, Companys E, Puy J. Determination of the complexing capacity of wine for Zn using the absence of gradients and nernstian equilibrium stripping technique. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:1051-1059. [PMID: 23320961 DOI: 10.1021/jf3037038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The complexing capacity of synthetic (0.011 M tartrate in 13.5% ethanol) and real wine (Raimat Abadia) in titrations with added total Zn concentrations up to 0.03 M has been determined following the free Zn concentrations with AGNES (absence of gradients and Nernstian equilibrium stripping) technique. A correction to find the preconcentration factor or gain (Y(1)) really applied at each one of the ionic strengths reached due to Zn additions along the titration has been applied. The standard implementation of AGNES to real wine led to the observation of two anomalous behaviors: (a) an increasingly negative current in the deposition stage (labeled as "HER" effect) and (b) a minimum in the currents of the stripping stage plot (labeled as the "dip" effect). A practical strategy to apply AGNES avoiding the dip effect has been developed to quantify properly free Zn concentrations. The van den Berg-Ružic-Lee linearization method (assuming the existence of just 1:1 complexes) has been adapted to consider the dilution effect and the ionic strength changes. Aggregated stability constants and total ligand concentrations have been calculated from synthetic and wine titration data. The found complexing capacity in the studied wine (c(T,L) = 0.0179 ± 0.0007 M) indicates the contribution of ligands other than tartrate (which is confirmed to be the main one).
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Affiliation(s)
- Diana Chito
- Departament de Química, Universitat de Lleida , Rovira Roure 191, 25198 Lleida, Spain
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Yin Y, Liu J, Jiang G. Photo-induced chemical-vapor generation for sample introduction in atomic spectrometry. Trends Analyt Chem 2011. [DOI: 10.1016/j.trac.2011.04.021] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Atomic Absorption Spectrometry (flame, electrothermal, vapour generation) in Environmental, Biological and Food Analysis. ENVIRONMENTAL HEAVY METAL POLLUTION AND EFFECTS ON CHILD MENTAL DEVELOPMENT 2011. [DOI: 10.1007/978-94-007-0253-0_11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Multisyringe ion chromatography with chemiluminescence detection for the determination of oxalate in beer and urine samples. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0511-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sousa-Ferreira H, Matos-Reyes MN, Cervera ML, Costa-Ferreira SL, de la Guardia M. Screening of Toxic Inorganic Arsenic Species in Garlic (Allium sativum L.). FOOD ANAL METHOD 2010. [DOI: 10.1007/s12161-010-9187-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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