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Krause CH, Schneider AB, Kolling L, de Morais PHSR, da Silva MM. How to overcome the difficulty in assaying Ni in biodiesel samples? Extraction induced by microemulsion breaking and square wave adsorptive stripping voltammetry could be the answer. Talanta 2024; 272:125776. [PMID: 38428129 DOI: 10.1016/j.talanta.2024.125776] [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: 10/28/2023] [Revised: 12/11/2023] [Accepted: 02/08/2024] [Indexed: 03/03/2024]
Abstract
Herein, a simple, green, and relatively inexpensive approach to determine nickel (Ni) in biodiesel samples by square wave adsorptive cathodic stripping voltammetry (SWAdCSV) is presented. A method based on the accumulation of Ni as Ni(II)-dimethylglyoxime (Ni(II)(HDMG)2) on the glassy carbon electrode was carried out in a solution containing the aqueous phase extract (APhEx) obtained from an extraction induced by microemulsion breaking (EIMB), which was achieved by adding a few microliters of ultrapure water to a microemulsion composed of biodiesel, n-propanol and a diluted HNO3 solution. The LOD and LOQ were 0.2 μg L-1 and 0.8 μg L-1, respectively, and the accuracy was evaluated by recovery assays of spiked samples and by analyzing a standard reference material. Results obtained from a comparative method (HR-CS GF AAS) were also used for this evaluation. The method was applied to biodiesel samples produced from different feedstocks. To the best of the authors knowledge, it is the first time that: 1) Ni in biodiesel is determined by a voltammetric method; 2) EIMB is applied to extract Ni from this matrix and 3) this type of sample preparation method is used with adsorptive stripping voltammetry.
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Affiliation(s)
- Cristian H Krause
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Alexandre B Schneider
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil.
| | - Leandro Kolling
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Pedro H S R de Morais
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Marcia M da Silva
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil
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Krause CH, Schneider AB, Kolling L, Oliveira LTT, da Silva MM. A simple, fast and inexpensive approach to quantify low concentrations of iron in biodiesel by voltammetry after extraction induced by microemulsion breaking. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024. [PMID: 38682647 DOI: 10.1039/d4ay00342j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
An alternative approach to assay iron (Fe) in biodiesel by differential pulse adsorptive cathodic stripping voltammetry (DPAdCSV) is presented herein. The sample treatment involved a simple, rapid, but effective extraction of Fe from biodiesel into an aqueous phase after microemulsion (ME) breaking. Then, Fe was determined as the complex Fe(III)-PAN (1-(2-pyridylazo)-2-naphthol) on a glassy carbon electrode (GCE) in the presence of bismuth (Bi(III)). The extraction induced by microemulsion breaking (EIMB) was achieved by adding 0.80 mL of ultrapure water into a water-in-oil ME containing 7.00 mL biodiesel, 2.70 mL n-propanol and 0.30 mL of 0.25 mol L-1 HNO3 solution. No deliberate addition of surfactant was necessary to form and maintain the ME. The EIMB resulted in a 1.30 mL lower aqueous phase extract (APhEx) and an upper oily phase. DP voltammograms were recorded with a portable potentiostat, showing the potentiality of carrying out the determination out of a central laboratory. Another feature was the non-necessity of deaerating the solution to eliminate the dissolved O2. The limits of detection (LOD) and quantification (LOQ) were 1.7 μg L-1 (140 mg kg-1) and 5.5 μg L-1 (455 mg kg-1), respectively. The accuracy of the method was evaluated by recovery assays of spiked samples, by analyzing a standard reference material and by comparisons with high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS).
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Affiliation(s)
- Cristian H Krause
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil.
| | - Alexandre B Schneider
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil.
| | - Leandro Kolling
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil.
| | - Lauren T T Oliveira
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil.
| | - Márcia M da Silva
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15003, 91501-970, Porto Alegre, RS, Brazil.
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Ostatná V, Kasalová-Vargová V, Kékedy-Nagy L, Černocká H, Ferapontova EE. Chronopotentiometric sensing of specific interactions between lysozyme and the DNA aptamer. Bioelectrochemistry 2016; 114:42-47. [PMID: 28063413 DOI: 10.1016/j.bioelechem.2016.12.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 12/15/2016] [Accepted: 12/15/2016] [Indexed: 01/08/2023]
Abstract
Specific DNA-protein interactions are vital for cellular life maintenance processes, such as transcriptional regulation, chromosome maintenance, replication and DNA repair, and their monitoring gives valuable information on molecular-level organization of those processes. Here, we propose a new method of label-free electrochemical sensing of sequence specific binding between the lysozyme protein and a single stranded DNA aptamer specific for lysozyme (DNAapta) that exploits the constant current chronopotentiometric stripping (CPS) analysis at modified mercury electrodes. Specific lysozyme-DNAapta binding was distinguished from nonspecific lysozyme-DNA interactions at thioglycolic acid-modified mercury electrodes, but not at the dithiothreitol-modified or bare mercury electrodes. Stability of the surface-attached lysozyme-DNAapta layer depended on the stripping current (Istr) intensity, suggesting that the integrity of the layer critically depends on the time of its exposure to negative potentials. Stabilities of different lysozyme-DNA complexes at the negatively polarized electrode surface were tested, and it was shown that structural transitions of the specific lysozyme-DNAapta complexes occur in the Istr ranges different from those observed for assemblies of lysozyme with DNA sequences capable of only nonspecific lysozyme-DNA interactions. Thus, the CPS allows distinct discrimination between specific and non-specific protein-DNA binding and provides valuable information on stability of the nucleic acid-protein interactions at the polarized interfaces.
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Affiliation(s)
- Veronika Ostatná
- Institute of Biophysics, The Czech Academy of Science, v.v.i., Královopolská 135, 61265 Brno, Czech Republic.
| | - Veronika Kasalová-Vargová
- Institute of Biophysics, The Czech Academy of Science, v.v.i., Královopolská 135, 61265 Brno, Czech Republic
| | - László Kékedy-Nagy
- Interdisciplinary Nanoscience Center (iNANO) and Center for DNA Nanotechnology (CDNA), Science and Technology, Aarhus University, Gustav Wieds Vej 14, DK 8000 Aarhus-C, Denmark
| | - Hana Černocká
- Institute of Biophysics, The Czech Academy of Science, v.v.i., Královopolská 135, 61265 Brno, Czech Republic
| | - Elena E Ferapontova
- Interdisciplinary Nanoscience Center (iNANO) and Center for DNA Nanotechnology (CDNA), Science and Technology, Aarhus University, Gustav Wieds Vej 14, DK 8000 Aarhus-C, Denmark
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Paleček E, Tkáč J, Bartošík M, Bertók T, Ostatná V, Paleček J. Electrochemistry of nonconjugated proteins and glycoproteins. Toward sensors for biomedicine and glycomics. Chem Rev 2015; 115:2045-108. [PMID: 25659975 PMCID: PMC4360380 DOI: 10.1021/cr500279h] [Citation(s) in RCA: 214] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Emil Paleček
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Tkáč
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Martin Bartošík
- Regional
Centre for Applied Molecular Oncology, Masaryk
Memorial Cancer Institute, Žlutý kopec 7, 656 53 Brno, Czech Republic
| | - Tomáš Bertók
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Veronika Ostatná
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Paleček
- Central
European Institute of Technology, Masaryk
University, Kamenice
5, 625 00 Brno, Czech Republic
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Bobrowski A, Królicka A, Putek M, Zarębski J, Antonatos N, Economou A. Catalytic Adsorptive Stripping Chronopotentiometry of Co(II)-DMG-Bromate System at an In Situ Plated Lead Film Electrode. ELECTROANAL 2013. [DOI: 10.1002/elan.201300334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chen L, Lv C, Chen J, Bi S. Numerical simulation study on cyclic reciprocal derivative chronopotentiometry of reversible electrode reaction coupled with Langmuir adsorption. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.12.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Paleček E. Early stage of nucleic acid electrochemistry. Detection of DNA damage in X-ray-irradiated rats. ACTA ACUST UNITED AC 2012. [DOI: 10.1135/cccc2011151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
First papers on electroactivity of DNA and RNA were published more then 50 years ago. For about 8 years oscillographic polarography at controlled a.c. (OP, proposed by J. Heyrovský already in 1941) was the method of choice for DNA analysis. Since approximately 1954 Robert Kalvoda developed OP for wide application in various fields. It is shown that already before 1960 it was possible to detect damage to DNA in X-ray-irradiated rats by means of OP. DNA samples from irradiated animals produced significantly larger OP anodic guanine signal indicating changes in the DNA structure. At present, radiation-induced strand breaks and damage to bases in DNA can be electrochemically detected at high sensitivity.
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Bobrowski A, Kapturski P, Zarębski J. Catalytic Adsorptive Stripping Chronopotentiometric Determination of Hexavalent Chromium at a Silver Amalgam Film Electrode of Prolonged Application. ELECTROANAL 2011. [DOI: 10.1002/elan.201100237] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cyclic reciprocal derivative chronopotentiometric behavior of electrode process in the presence of adsorptive reactants: A theoretical study of the electrolysis sequence of adsorptive and diffusing electroactive reactants. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sims MJ, Li Q, Kachoosangi RT, Wildgoose GG, Compton RG. Using multiwalled carbon nanotube modified electrodes for the adsorptive striping voltammetric determination of hesperidin. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2008.10.056] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Theoretical study of irreversible electrode reactions with Henry adsorption using symmetrical cyclic reciprocal derivative chronopotentiometry. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.02.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Vyskočil V, Barek J. Mercury Electrodes–Possibilities and Limitations in Environmental Electroanalysis. Crit Rev Anal Chem 2009. [DOI: 10.1080/10408340903011820] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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van Leeuwen HP, Town RM. Adsorptive stripping chronopotentiometry (AdSCP). Part 1: Fundamental features. J Electroanal Chem (Lausanne) 2007. [DOI: 10.1016/j.jelechem.2007.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Serrano N, Díaz-Cruz J, Ariño C, Esteban M. Stripping Chronopotentiometry in Environmental Analysis. ELECTROANAL 2007. [DOI: 10.1002/elan.200703956] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kapturski P, Bobrowski A. Silver Amalgam Film Electrode of Prolonged Application in Stripping Chronopotentiometry. ELECTROANAL 2007. [DOI: 10.1002/elan.200703992] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Nowak K, Bobrowski A. Application of the Bismuth Film Electrode for Catalytic Adsorptive Stripping Potentiometric Determination of Cobalt in Dimethylglyoxime‐Nitrite System. ANAL LETT 2007. [DOI: 10.1080/00032710500230863] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Katarzyna Nowak
- a Department of Building Materials Technology, Faculty of Materials Science and Ceramics , AGH‐University of Science and Technology , Krakow , Poland
| | - Andrzej Bobrowski
- a Department of Building Materials Technology, Faculty of Materials Science and Ceramics , AGH‐University of Science and Technology , Krakow , Poland
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Zhang HX, Chen Q, Wen R, Hu JS, Wan LJ. Effect of Polycyclic Aromatic Hydrocarbons on Detection Sensitivity of Ultratrace Nitroaromatic Compounds. Anal Chem 2007; 79:2179-83. [PMID: 17269652 DOI: 10.1021/ac0618268] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) with different numbers of pi-electrons and geometric symmetry of pi-systems, including anthracene, phenanthrene, pyrene, triphenylene, perylene, benzo[ghi]perylene, and coronene, were chosen to modify glassy carbon electrodes (GCEs) by self-assembling. The self-assembled monolayer of PAHs was investigated by STM and was used in the electrochemical detection of nitroaromatic compounds (NACs). The results indicate that PAH-modified GCE shows higher sensitivity to NACs than an unmodified one. Among the seven different PAHs, coronene-modified GCE exhibits the highest sensitivity to 2,4,6-trinitrotoluene and 1,3,5-trinitrobenzene.
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Carrington NA, Rodman DL, Xue ZL. Palladium and the electrochemical quartz crystal microbalance: a new method for the in situ analysis of the precious metal in aqueous solutions. Anal Chim Acta 2006; 572:303-8. [PMID: 17723493 DOI: 10.1016/j.aca.2006.05.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2006] [Revised: 05/07/2006] [Accepted: 05/10/2006] [Indexed: 11/21/2022]
Abstract
A new method for the quantitative determination of palladium(II) by the electrochemical quartz crystal microbalance (EQCM) technique has been developed. Using a bare carbon-coated quartz crystal, Pd(II) ions are directly deposited from aqueous solution as palladium metal onto the crystal surface, and the Pd(II) concentration is determined with a detection limit of 0.0156 mM, or 1.66 ppm. No complexing agent or preconcentration of palladium is required for the analysis. The palladium is stripped from the crystal through its electrochemical oxidation, regenerating the crystal for subsequent multi-cycle palladium analyses. A conventional gold-coated quartz crystal was incapable of carrying out the same measurements. The EQCM technique presented is simple, sensitive, and reproducible for the detection of this widely used precious metal.
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Affiliation(s)
- Nathan A Carrington
- Department of Chemistry, The University of Tennessee, Knoxville, TN 37996-1600, United States
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González J, Molina Á. Linear sweep voltammetric and chronopotentiometric charge/potential curves for non reversible redox monolayers. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2005.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Molina Á, González J, Morales I. Steady State Reciprocal Derivative Chronopotentiometry with Programmed Currents at Microelectrodes. ELECTROANAL 2005. [DOI: 10.1002/elan.200403138] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Molina A, González J. Charge–potential and capacitance–potential curves corresponding to reversible redox Langmuir submonolayers of quinizarine in aqueous acidic solutions. Electrochim Acta 2004. [DOI: 10.1016/j.electacta.2003.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gonzalez J, Molina A. Charge–potential and capacitance–potential curves corresponding to reversible redox monolayers. J Electroanal Chem (Lausanne) 2003. [DOI: 10.1016/s0022-0728(03)00368-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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