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Ricard E, Pinheiro JP, Le Hécho I, Parat C. ISIDORE, a Probe for In Situ Trace Metal Speciation Based on the Donnan Membrane Technique and Electrochemical Detection Part 2: Cd and Pb Measurements during the Accumulation Time of the Donnan Membrane Technique. Molecules 2023; 28. [PMID: 36677906 DOI: 10.3390/molecules28020846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/19/2023] Open
Abstract
The Donnan membrane technique (DMT), in which a synthetic or natural solution (the "donor") is separated from a ligand-free solution (the "acceptor") by a cation-exchange membrane, is a recognized technique for measuring the concentration of a free metal ion in situ, with coupling to electrochemical detection allowing for the quantification of the free metal ion directly on site. However, the use of the DMT requires waiting for the free metal ion equilibrium between the donor and the acceptor solution. In this paper, we investigated the possibility of using the kinetic information and showed that non-equilibrium experimental calibrations of Cd and Pb with the ISIDORE probe could be used to measure free metal concentrations under conditions of membrane-controlled diffusion transport. The application of this dynamic approach made it possible to successfully determine the concentration of free Cd in synthetic and natural river samples. Furthermore, it was found that the determination of free Cd from the slope was not affected by the Ca concentration ratio between the acceptor and donor solution, as opposed to the traditional approach based on Donnan equilibrium. This ISIDORE probe appears to be a promising tool for determining free metal ions in natural samples.
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Rosales-Segovia K, Sans-Duñó J, Companys E, Puy J, Alcalde B, Anticó E, Fontàs C, Galceran J. Effective concentration signature of Zn in a natural water derived from various speciation techniques. Sci Total Environ 2022; 806:151201. [PMID: 34699815 DOI: 10.1016/j.scitotenv.2021.151201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/09/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
The uptake of nutrients or toxicants by different organisms in aquatic systems is known to correlate with different fractions of the nutrient's or toxicant's total concentration. These fractions can be provided by different analytical techniques, from which the better correlation is expected to be found for those with a characteristic length comparable to that in the considered organism uptake. An effective concentration signature can be built up with the concentration values associated to the availability (i.e. fluxes in dynamic techniques) of the nutrient or toxicant measured by various analytical techniques with different characteristic lengths. Here, this new representation was obtained for the pool of Zn complexes in the Mediterranean stream Riera d'Osor (Girona, Catalonia, Spain) with a suite of four analytical techniques. Absence of Gradients and Nernstian Equilibrium Stripping (AGNES) and Polymer Inclusion Membrane (PIM) devices provided the free Zn concentration. Linear Anodic Stripping Voltammetry provided a labile fraction (defined here as cLASV, higher than the free concentration), related to the diffusion layer scale. Diffusion Gradients in Thin-films provided higher labile fractions (known as DGT concentrations, cDGT) connected to the different characteristic lengths of different configurations (e.g. one or two resin discs) longer, in any case, than that corresponding to LASV. The combination of the information retrieved by the techniques allowed to quantify lability degrees of the pool of Zn complexes and to build up the effective concentration signature for this water.
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Affiliation(s)
- Kevin Rosales-Segovia
- Departament de Química. Universitat de Lleida, and AGROTECNIO-CERCA, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Jordi Sans-Duñó
- Departament de Química. Universitat de Lleida, and AGROTECNIO-CERCA, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Encarna Companys
- Departament de Química. Universitat de Lleida, and AGROTECNIO-CERCA, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Jaume Puy
- Departament de Química. Universitat de Lleida, and AGROTECNIO-CERCA, Rovira Roure 191, 25198 Lleida, Catalonia, Spain
| | - Berta Alcalde
- Departament de Química, Universitat de Girona, Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Enriqueta Anticó
- Departament de Química, Universitat de Girona, Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Clàudia Fontàs
- Departament de Química, Universitat de Girona, Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Josep Galceran
- Departament de Química. Universitat de Lleida, and AGROTECNIO-CERCA, Rovira Roure 191, 25198 Lleida, Catalonia, Spain.
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Pla-vilanova P, Galceran J, Puy J, Companys E, Filella M. Antimony speciation in aqueous solution followed with AGNES. J Electroanal Chem (Lausanne) 2019; 849:113334. [DOI: 10.1016/j.jelechem.2019.113334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Tehrani MH, Companys E, Dago A, Puy J, Galceran J. New methodology to measure low free indium (III) concentrations based on the determination of the lability degree of indium complexes. Assessment of In(OH)3 solubility product. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.05.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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David CA, Galceran J, Quattrini F, Puy J, Rey-Castro C. Dissolution and Phosphate-Induced Transformation of ZnO Nanoparticles in Synthetic Saliva Probed by AGNES without Previous Solid-Liquid Separation. Comparison with UF-ICP-MS. Environ Sci Technol 2019; 53:3823-3831. [PMID: 30807690 DOI: 10.1021/acs.est.8b06531] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The variation over time of free Zn2+ ion concentration in stirred dispersions of ZnO nanoparticles (ZnO NPs) prepared in synthetic saliva at pH 6.80 and 37 °C was followed in situ (without solid-liquid separation step) with the electroanalytical technique AGNES (Absence of Gradients and Nernstian Equilibrium Stripping). Under these conditions, ZnO NPs are chemically unstable due to their reaction with phosphates. The initial stage of transformation (around 5-10 h) involves the formation of a metastable solid (presumably ZnHPO4), which later evolves into the more stable hopeite phase. The overall decay rate of ZnO NPs is significantly reduced in comparison with phosphate-free background solutions of the same ionic strength and pH. The effective equilibrium solubilities of ZnO (0.29-0.47 mg·L-1), as well as conditional excess-ligand stability constants and fractional distributions of soluble Zn species, were determined in the absence and presence of organic components. The results were compared with the conventional ultrafiltration and inductively coupled plasma-mass spectrometry (UF-ICP-MS) methodology. AGNES proves to be advantageous in terms of speed, reproducibility, and access to speciation information.
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Affiliation(s)
- Calin A David
- Departament de Química , Universitat de Lleida, and AGROTECNIO , Rovira Roure 191 , 25198 Lleida , Spain
| | - Josep Galceran
- Departament de Química , Universitat de Lleida, and AGROTECNIO , Rovira Roure 191 , 25198 Lleida , Spain
| | - Federico Quattrini
- Departament de Química , Universitat de Lleida, and AGROTECNIO , Rovira Roure 191 , 25198 Lleida , Spain
| | - Jaume Puy
- Departament de Química , Universitat de Lleida, and AGROTECNIO , Rovira Roure 191 , 25198 Lleida , Spain
| | - Carlos Rey-Castro
- Departament de Química , Universitat de Lleida, and AGROTECNIO , Rovira Roure 191 , 25198 Lleida , Spain
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Companys E, Galceran J, Puy J, Sedó M, Vera R, Anticó E, Fontàs C. Comparison of different speciation techniques to measure Zn availability in hydroponic media. Anal Chim Acta 2018; 1035:32-43. [DOI: 10.1016/j.aca.2018.06.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 06/06/2018] [Accepted: 06/25/2018] [Indexed: 11/22/2022]
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Tehrani MH, Companys E, Dago A, Puy J, Galceran J. Free indium concentration determined with AGNES. Sci Total Environ 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Lao M, Companys E, Weng L, Puy J, Galceran J. Speciation of Zn, Fe, Ca and Mg in wine with the Donnan Membrane Technique. Food Chem 2018; 239:1143-1150. [DOI: 10.1016/j.foodchem.2017.07.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/14/2017] [Accepted: 07/10/2017] [Indexed: 11/28/2022]
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Hashemi N, Vaezi Z, Sedghi M, Naderi-Manesh H. Hemoglobin-incorporated iron quantum clusters as a novel fluorometric and colorimetric probe for sensing and cellular imaging of Zn(II) and cysteine. Mikrochim Acta 2017; 185:60. [DOI: 10.1007/s00604-017-2600-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/01/2017] [Indexed: 12/14/2022]
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Affiliation(s)
- Jean-Pierre Simonin
- CNRS, UMR 8234, PHENIX, F-75005, Paris, France
- Laboratoire PHENIX,
Sorbonne
Universités, Université P. M. Curie, UPMC Univ Paris
06, UMR 8234, F-75005, Paris, France
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Domingos RF, Carreira S, Galceran J, Salaün P, Pinheiro JP. AGNES at vibrated gold microwire electrode for the direct quantification of free copper concentrations. Anal Chim Acta 2016; 920:29-36. [PMID: 27114220 DOI: 10.1016/j.aca.2016.03.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/09/2016] [Accepted: 03/23/2016] [Indexed: 11/23/2022]
Abstract
The free metal ion concentration and the dynamic features of the metal species are recognized as key to predict metal bioavailability and toxicity to aquatic organisms. Quantification of the former is, however, still challenging. In this paper, it is shown for the first time that the concentration of free copper (Cu(2+)) can be quantified by applying AGNES (Absence of Gradients and Nernstian equilibrium stripping) at a solid gold electrode. It was found that: i) the amount of deposited Cu follows a Nernstian relationship with the applied deposition potential, and ii) the stripping signal is linearly related with the free metal ion concentration. The performance of AGNES at the vibrating gold microwire electrode (VGME) was assessed for two labile systems: Cu-malonic acid and Cu-iminodiacetic acid at ionic strength 0.01 M and a range of pH values from 4.0 to 6.0. The free Cu concentrations and conditional stability constants obtained by AGNES were in good agreement with stripping scanned voltammetry and thermodynamic theoretical predictions obtained by Visual MinteQ. This work highlights the suitability of gold electrodes for the quantification of free metal ion concentrations by AGNES. It also strongly suggests that other solid electrodes may be well appropriate for such task. This new application of AGNES is a first step towards a range of applications for a number of metals in speciation, toxicological and environmental studies for the direct determination of the key parameter that is the free metal ion concentration.
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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] [What about the content of this article? (0)] [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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Lao M, Dago A, Serrano N, Companys E, Puy J, Galceran J. Free Zn2+ determination in systems with Zn-Glutathione. J Electroanal Chem (Lausanne) 2015; 756:207-11. [DOI: 10.1016/j.jelechem.2015.08.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Parat C, Pinheiro JP. ISIDORE, a probe for in situ trace metal speciation based on Donnan membrane technique with related electrochemical detection part 1: Equilibrium measurements. Anal Chim Acta 2015; 896:1-10. [PMID: 26481984 DOI: 10.1016/j.aca.2015.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/21/2015] [Accepted: 07/24/2015] [Indexed: 11/18/2022]
Abstract
This work presents the development of a new probe (ISIDORE probe) based on the hyphenation of a Donnan Membrane Technique device (DMT) to a screen-printed electrode through a flow-cell to determine the free zinc, cadmium and lead ion concentration in natural samples, such as a freshwater river. The probe displays many advantages namely: (i) the detection can be performed on-site, which avoids all problems inherent to sampling, transport and storage; (ii) the low volume of the acceptor solution implies shorter equilibration times; (ii) the electrochemical detection system allows monitoring the free ion concentration in the acceptor solution without sampling.
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Affiliation(s)
- Corinne Parat
- Université de Pau et des Pays de l'Adour, CNRS UMR 5254, LCABIE, 64000 Pau, France.
| | - J P Pinheiro
- Université de Lorraine/ENSG, CNRS UMR 7360, LIEC, 54500 Nancy, France
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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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] [What about the content of this article? (0)] [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. J Agric Food Chem 2013; 61:1051-1059. [PMID: 23320961 DOI: 10.1021/jf3037038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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] [What about the content of this article? (0)] [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] [What about the content of this article? (0)] [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). Sci Total Environ 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] [What about the content of this article? (0)] [Affiliation(s)] [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] [What about the content of this article? (0)] [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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Caplat C, Oral R, Mahaut ML, Mao A, Barillier D, Guida M, Della Rocca C, Pagano G. Comparative toxicities of aluminum and zinc from sacrificial anodes or from sulfate salt in sea urchin embryos and sperm. Ecotoxicol Environ Saf 2010; 73:1138-1143. [PMID: 20650532 DOI: 10.1016/j.ecoenv.2010.06.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 06/23/2010] [Accepted: 06/26/2010] [Indexed: 05/29/2023]
Abstract
The toxicity of aluminum or zinc from either sacrificial anodes (SA) or their sulfate salts (SS) was evaluated in sea urchin (Paracentrotus lividus) embryos or sperm exposed to Al(III) or Zn(II) (SA or SS, 0.1-10 microM), scoring developmental defects (DDs), fertilization rate (FR), and mitotic abnormalities. A significant DD increase was observed in SS, but not SA Al(III)- and Zn(II)-exposed embryos vs. controls. Both Al(III) and Zn(II), up to 10 microM, from SA and SS, inhibited mitotic activity and induced mitotic aberrations in exposed embryos. SA-Al(III)-exposed sperm displayed a significant FR increase, unlike Al(III) sulfate overlapping with controls. Both SA-Zn(II) and Zn(II) sulfate sperm exposure resulted in a significant FR increase. The offspring of SA-Al(III)-exposed sperm displayed a significant DD decrease, unlike Al(III) sulfate exposure. Zinc sulfate sperm exposure resulted in a significant increase in offspring DDs, whereas SA-Zn(II) sperm exposure decreased DDs. Together, exposures to SA-dissolved Al(III) or Zn(II) resulted in lesser, if any toxicity, up to hormesis, compared to SS. Studies of metal speciation should elucidate the present results.
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Affiliation(s)
- Christelle Caplat
- ERPCB EA 3914 IUT-UFR Sciences, Université de Caen, Boulevard du Marechal Juin, Esplanade de la Paix, F-14032 Caen, France
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rocha LS, Companys E, Galceran J, Carapuça HM, Pinheiro JP. Evaluation of thin mercury film rotating disk electrode to perform absence of gradients and Nernstian equilibrium stripping (AGNES) measurements. Talanta 2010; 80:1881-7. [DOI: 10.1016/j.talanta.2009.10.038] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 10/13/2009] [Accepted: 10/18/2009] [Indexed: 10/20/2022]
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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] [What about the content of this article? (0)] [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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Pinheiro JP, Salvador J, Companys E, Galceran J, Puy J. Experimental verification of the metal flux enhancement in a mixture of two metal complexes: the Cd/NTA/glycine and Cd/NTA/citric acid systems. Phys Chem Chem Phys 2010; 12:1131-8. [DOI: 10.1039/b915486h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Galceran J, Chito D, Martínez-Micaelo N, Companys E, David C, Puy J. The impact of high Zn° concentrations on the application of AGNES to determine free Zn(II) concentration. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2009.10.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pesavento M, Alberti G, Biesuz R. Analytical methods for determination of free metal ion concentration, labile species fraction and metal complexation capacity of environmental waters: A review. Anal Chim Acta 2009; 631:129-41. [DOI: 10.1016/j.aca.2008.10.046] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Revised: 10/14/2008] [Accepted: 10/16/2008] [Indexed: 11/18/2022]
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Puy J, Galceran J, Huidobro C, Companys E, Samper N, Garcés JL, Mas F. Conditional affinity spectra of Pb2+-humic acid complexation from data obtained with AGNES. Environ Sci Technol 2008; 42:9289-9295. [PMID: 19174906 DOI: 10.1021/es8021123] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The new electroanalytical technique AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) has been applied to follow Pb2+ complexation to Purified Aldrich Humic Acid. A refined methodology of AGNES, allowing considerably larger gains, reached free metal ion concentrations down to subnanomolar values in a reasonable deposition time due to the lability and mobility of these complexes. Further insights into the meaning of the binding data, fitted to a NICA (Non Ideal Competitive Adsorption) isotherm, can be obtained with the concept of conditional affinity spectrum (CAS). For this purpose, we present the analytical expression for the CAS of NICA isotherm and show the CAS distributions for the Pb binding at fixed pH. Results reveal that the underlying spectra of each elementary distribution of the bimodal NICA evolve with pH yielding different overlapping and nonsymmetrical distributions. A non-negligible occupation of phenolic and carboxylic sites by Pb2+ takes place in the range of 4 < pH < 9.
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Affiliation(s)
- Jaume Puy
- Departament de Química, Universitat de Lleida, Rovira Roure 191, 25198 Lleida, Spain
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Companys E, Naval-Sánchez M, Martínez-Micaelo N, Puy J, Galceran J. Measurement of free zinc concentration in wine with AGNES. J Agric Food Chem 2008; 56:8296-8302. [PMID: 18759440 DOI: 10.1021/jf8013475] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
AGNES (absence of gradients and Nernstian equilibrium stripping), a voltammetric technique recently introduced to measure free metal concentration in solution and checked with different natural and synthetic aqueous media, has been applied here to determine free Zn concentration in wine. The content of ethanol in a solution increases its viscosity, and, so, the diffusion coefficient decreases. Another added effect in ethanolic solutions is the increase of the activity of the metal ions, due to the decrease of the permittivity in the alcoholic medium with respect to the aqueous one. With this taken into account, a specific methodology has been developed to apply AGNES in ethanolic media. A relevant point in this methodology has been the introduction of a new kind of blank, the EDTA blank, able to be applied in the same natural sample and with the same potential program. The free Zn concentrations of the two wines analyzed, a red and a white Raimat wine, were 4.5(2) x 10 (-7) and 7.2(4) x 10 (-7) M, respectively. These represent around 5% of the total Zn content. In the wine samples analyzed, it was checked that intermetallic formation of Zn-Cu does not affect the measurement of free Zn in a significant way.
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Affiliation(s)
- Encarnació Companys
- Departament de Química, Universitat de Lleida, Rovira Roure 191, 25198 Lleida, Spain
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Domingos RF, Huidobro C, Companys E, Galceran J, Puy J, Pinheiro J. Comparison of AGNES (absence of gradients and Nernstian equilibrium stripping) and SSCP (scanned stripping chronopotentiometry) for trace metal speciation analysis. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.02.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Alberti G, Biesuz R, Huidobro C, Companys E, Puy J, Galceran J. A comparison between the determination of free Pb(II) by two techniques: Absence of gradients and Nernstian equilibrium stripping and resin titration. Anal Chim Acta 2007; 599:41-50. [PMID: 17765062 DOI: 10.1016/j.aca.2007.07.055] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2007] [Revised: 07/13/2007] [Accepted: 07/19/2007] [Indexed: 11/23/2022]
Abstract
Absence of gradients and Nernstian equilibrium stripping (AGNES) is an emerging electroanalytical technique designed to measure free metal ion concentration. The practical implementation of AGNES requires a critical selection of the deposition time, which can be drastically reduced if the contribution of the complexes is properly taken into account. The resin titration (RT) is a competition method based on the sorption of metal ions on a complexing resin. The competitor here considered is the resin Chelex 100 whose sorbing properties towards Pb(II) are well known. The RT is a consolidated technique especially suitable to perform an intercomparison with AGNES, due to its independent physicochemical nature. Two different ligands for Pb(II) complexation have been analyzed here: nitrilotriacetic acid (NTA) and pyridinedicarboxylic acid (PDCA). The complex PbNTA is practically inert in the diffusion layer, so, for ordinary deposition potentials, its contribution is almost negligible; however, at potentials more negative than -0.8 V vs. Ag/AgCl the complex dissociates on the electrodic surface giving rise to a second wave in techniques such as normal pulse polarography. The complex Pb-PDCA is partially labile, so that its contribution can be estimated from an expression of the lability degree of the complex. These new strategies allow us to reduce the deposition time. The free Pb(II) concentrations obtained by AGNES and by RT are in full agreement for both systems here considered. The main advantage of the use of AGNES in these systems lies in the reduction of the time of the experiment, while RT can be applied to non-amalgamating elements and offers the possibility of simultaneous determinations.
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Affiliation(s)
- Giancarla Alberti
- Dipartimento di Chimica Generale, Università di Pavia, via Taramelli 12, Pavia 27100, Italy
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