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Tehrani MH, Companys E, Dago A, Puy J, Galceran J. Free indium concentration determined with AGNES. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 612:269-275. [PMID: 28850847 DOI: 10.1016/j.scitotenv.2017.08.200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/27/2017] [Accepted: 08/18/2017] [Indexed: 06/07/2023]
Abstract
Indium is increasingly used in electronic devices, from which it can be mobilized towards environmental compartments. Speciation of In in waters is important for its direct ecotoxicological effects, as well as for the fate of this element in the environment (e.g. fluxes from or towards sediments). Free indium concentrations in the environment can be extremely low due to hydrolysis, especially important in trivalent cations, to precipitation and to complexation with different ligands. In this work, the free indium concentration (which is a toxicologically and geochemically relevant fraction) in aqueous solutions at pH3 has been measured with an adapted version of the electroanalytical technique AGNES (Absence of Gradients and Nernstian Equilibrium Stripping). Speciation measurements in mixtures of indium with the ligands NTA (nitrilotriacetic acid) and oxalate indicate that the values of their stability constants in the NIST46.6 database are less adequate than those published in some more recent literature. The extraordinary lability and mobility of In-oxalate complexes allow the measuring of free indium concentrations below nmol/L in just 25s of deposition time.
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Affiliation(s)
- Marjan H Tehrani
- Departament de Química, Universitat de Lleida, and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Encarna Companys
- Departament de Química, Universitat de Lleida, and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Catalonia, Spain.
| | - Angela Dago
- Departament de Química, Universitat de Lleida, and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Jaume Puy
- Departament de Química, Universitat de Lleida, and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Josep Galceran
- Departament de Química, Universitat de Lleida, and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
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Pearson HB, Galceran J, Companys E, Braungardt C, Worsfold P, Puy J, Comber S. Absence of Gradients and Nernstian Equilibrium Stripping (AGNES) for the determination of [Zn2+] in estuarine waters. Anal Chim Acta 2016; 912:32-40. [DOI: 10.1016/j.aca.2016.01.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/13/2016] [Accepted: 01/19/2016] [Indexed: 10/22/2022]
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Rocha LS, Galceran J, Puy J, Pinheiro JP. Determination of the Free Metal Ion Concentration Using AGNES Implemented with Environmentally Friendly Bismuth Film Electrodes. Anal Chem 2015; 87:6071-8. [DOI: 10.1021/acs.analchem.5b00606] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Josep Galceran
- Department
of Chemistry, University of Lleida and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Spain
| | - Jaume Puy
- Department
of Chemistry, University of Lleida and AGROTECNIO, Rovira Roure 191, 25198 Lleida, Spain
| | - José Paulo Pinheiro
- Laboratoire Interdisciplinaire
des Environnements Continentaux, UMR 7360 CNRS, Université de Lorraine, 15 Avenue
du Charmois, 54500 Vandoeuvre-les-Nancy, France
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Tantra R, Bouwmeester H, Bolea E, Rey-Castro C, David CA, Dogné JM, Jarman J, Laborda F, Laloy J, Robinson KN, Undas AK, van der Zande M. Suitability of analytical methods to measure solubility for the purpose of nanoregulation. Nanotoxicology 2015; 10:173-84. [DOI: 10.3109/17435390.2015.1038661] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Galceran J, Lao M, David C, Companys E, Rey-Castro C, Salvador J, Puy J. The impact of electrodic adsorption on Zn, Cd and Pb speciation measurements with AGNES. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.03.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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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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Aguilar D, Galceran J, Companys E, Puy J, Parat C, Authier L, Potin-Gautier M. Non-purged voltammetry explored with AGNES. Phys Chem Chem Phys 2013; 15:17510-21. [DOI: 10.1039/c3cp52836g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Aguilar D, Parat C, Galceran J, Companys E, Puy J, Authier L, Potin-Gautier M. Determination of free metal ion concentrations with AGNES in low ionic strength media. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.11.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chito D, Weng L, Galceran J, Companys E, Puy J, van Riemsdijk WH, van Leeuwen HP. Determination of free Zn2+ concentration in synthetic and natural samples with AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) and DMT (Donnan Membrane Technique). THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 421-422:238-244. [PMID: 22341403 DOI: 10.1016/j.scitotenv.2012.01.052] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 01/23/2012] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
The determination of free Zn(2+) ion concentration is a key in the study of environmental systems like river water and soils, due to its impact on bioavailability and toxicity. AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) and DMT (Donnan Membrane Technique) are emerging techniques suited for the determination of free heavy metal concentrations, especially in the case of Zn(2+), given that there is no commercial Ion Selective Electrode. In this work, both techniques have been applied to synthetic samples (containing Zn and NTA) and natural samples (Rhine river water and soils), showing good agreement. pH fluctuations in DMT and N(2)/CO(2) purging system used in AGNES did not affect considerably the measurements done in Rhine river water and soil samples. Results of DMT in situ of Rhine river water are comparable to those of AGNES in the lab. The comparison of this work provides a cross-validation for both techniques.
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Affiliation(s)
- Diana Chito
- Departament de Química, Universitat de Lleida, Rovira Roure 191, 25198 Lleida, Spain
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Parat C, Aguilar D, Authier L, Potin-Gautier M, Companys E, Puy J, Galceran J. Determination of Free Metal Ion Concentrations Using Screen-Printed Electrodes and AGNES with the Charge as Response Function. ELECTROANAL 2011. [DOI: 10.1002/elan.201000566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Parat C, Authier L, Aguilar D, Companys E, Puy J, Galceran J, Potin-Gautier M. Direct determination of free metal concentration by implementing stripping chronopotentiometry as the second stage of AGNES. Analyst 2011; 136:4337-43. [DOI: 10.1039/c1an15481h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chito D, Galceran J, Companys E. The Impact of Intermetallic Compounds CuxZn in the Determination of Free Zn2+ Concentration with AGNES. ELECTROANAL 2010. [DOI: 10.1002/elan.201000078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zavarise F, Companys E, Galceran J, Alberti G, Profumo A. Application of the new electroanalytical technique AGNES for the determination of free Zn concentration in river water. Anal Bioanal Chem 2010; 397:389-394. [DOI: 10.1007/s00216-009-3439-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 12/23/2009] [Accepted: 12/28/2009] [Indexed: 10/19/2022]
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