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Grabarczyk M, Fialek M, Wlazlowska E. Multiwall Carbon Nanotubes/Spherical Glassy Carbon as Environmentally Friendly Adsorption Materials Utilized in Adsorptive Stripping Voltammetry for the Determination of Trace Amounts of Ga(III). MATERIALS (BASEL, SWITZERLAND) 2024; 17:966. [PMID: 38399216 PMCID: PMC10890208 DOI: 10.3390/ma17040966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 02/16/2024] [Accepted: 02/18/2024] [Indexed: 02/25/2024]
Abstract
This work presents a proposal for an adsorptive stripping voltammetric (AdSV) method for gallium(III) determination at an eco-friendly multiwall carbon nanotube/spherical glassy carbon (MWCNT/SGC) electrode modified with a lead film. The operational factors influencing the sensitivity of the AdSV procedure were thoroughly investigated, and their most favorable values were chosen (0.1 mol L-1 acetate buffer solution pH = 5.6; 7 × 10-5 mol L-1 Pb(II); 2 × 10-4 mol L-1 cupferron; potential/time of lead film formation: -1.9 V/30 s; potential/time of Ga(III)-cupferron adsorption: -0.75 V/30 s). The newly developed MWCNT/SGCE has proven to be a competitive substrate to the glassy carbon electrode to create a lead film electrode, since it allows the determination of gallium in a wider range of concentrations from 3 × 10-9 to 4 × 10-7 mol L-1 with a lower limit of detection equal to 9.5 × 10-10 mol L-1. The elaborated procedure has been shown to be highly selective and insensitive to the presence of an even 100-fold excess of most of the ions commonly found in environmental waters. The MWCNT/SGC sensor, which can maintain >95% of its original response after 70 days of use, has been successfully applied for the detection of gallium in water samples with the relative standard deviation (RSD) ranging from 4.5% to 6.2% (n = 3) and recoveries in the range from 95.3% to 104.9%.
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Affiliation(s)
| | - Marzena Fialek
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland; (M.G.); (E.W.)
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Grabarczyk M, Wardak C, Piech R, Wawruch A. An Electrochemical Sensor for the Determination of Trace Concentrations of Cadmium, Based on Spherical Glassy Carbon and Nanotubes. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3252. [PMID: 37110088 PMCID: PMC10146725 DOI: 10.3390/ma16083252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/18/2023] [Accepted: 04/18/2023] [Indexed: 06/19/2023]
Abstract
The practical application of a novel, eco-friendly electrochemical sensor based on low-dimensional structures, spherical glassy carbon microparticles, and multiwall carbon nanotubes is described. This sensor, modified with a bismuth film, was used for the determination of Cd(II) by the anodic stripping voltammetric method. The instrumental and chemical factors influencing the sensitivity of the procedure were thoroughly investigated and their most favorable values were selected (acetate buffer solution pH = 3 ± 0.1; 0.15 mmol L-1 Bi(III); activation potential/time: -2 V/3 s; accumulation potential/time: -0.9 V/50 s). Under the selected conditions, the method exhibited linearity in the range of 2 × 10-9 to 2 × 10-7 mol L-1 Cd(II) with a detection limit of 6.2 × 10-10 mol L-1 Cd(II). The results obtained also showed that the application of the sensor for Cd(II) detection did not experience any significant interference in the presence of a number of foreign ions. The applicability of this procedure was evaluated using TM-25.5 Environmental Matrix Reference Material and SPS-WW1 Waste Water Certified Reference Material as well as river water samples through addition and recovery tests.
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Affiliation(s)
- Malgorzata Grabarczyk
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland; (C.W.)
| | - Cecylia Wardak
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland; (C.W.)
| | - Robert Piech
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland;
| | - Agnieszka Wawruch
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland; (C.W.)
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3
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Górska A, Paczosa-Bator B, Gaidukevič J, Piech R. Development of a New Voltammetric Method for Aceclofenac Determination on Glassy Carbon Electrode Modified with Hierarchical Nanocomposite. SENSORS (BASEL, SWITZERLAND) 2022; 22:8954. [PMID: 36433548 PMCID: PMC9693582 DOI: 10.3390/s22228954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/13/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Aceclofenac (ACL) is an anti-inflammatory drug, which is taken by patients who mainly suffer from rheumatoid conditions. In this work, we propose a new voltammetric method that allows the determination of ACL in pharmaceutics, urine, and plasma. As a working electrode, a glassy carbon electrode (GCE) modified with carbon nanofibers, carbon nanotubes, and NiCo nanoparticles (eCNF/CNT/NiCo-GCE) was used. The mentioned sensors are characterized by good repeatability and sensitivity, and their process of preparation is simple, fast, and cost-effective. Instrumental and method parameters were optimized, and the influence of interferences was investigated. To validate the analytical performance of the method, calibration was conducted. Good linearity was obtained (0.05-1.4 µM, r = 0.998), as well as excellent limit of detection (LOD) and limit of quantification (LOQ) values (0.7 nM and 2.1 nM, respectively). Calculated recoveries that were in the range of 98%-105% indicate that this method is accurate and might be used in routine laboratory practice.
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Affiliation(s)
- Anna Górska
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Beata Paczosa-Bator
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
| | - Justina Gaidukevič
- Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, LT-03225 Vilnius, Lithuania
| | - Robert Piech
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
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4
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Avan AA. Spectrophotometric and colorimetric determination of gallium (III) with p-aminohippuric acid-functionalized citrate capped gold nanoparticles. Turk J Chem 2021; 45:879-891. [PMID: 34385874 PMCID: PMC8326479 DOI: 10.3906/kim-2101-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 03/29/2021] [Indexed: 11/30/2022] Open
Abstract
A new technique for sensing Ga(III) concentration based on polyvinyl alcohol-citrate capped gold nanoparticle–
p-
aminohippuric acid hybrid (or three-layer core-shell configurations) has been demonstrated. The
p-
aminohippuric acid capped citrate-gold nanoparticles were comfortably agglomerated in the presence of Ga(III), and the color of the reaction quickly turned from red to violet or blue. Under the detection conditions, a good linear relationship was ideally obtained between the ratio of the absorbance intensity at 620 nm to that at 520 nm (A620/A520). The linear response range, the detection, and quantification limit was 34.9–418.3 μg/L and 7.6 μg/L, and 25 μg/L, respectively. To reflect the accuracy, the developed sensing approach was evaluated against certified reference materials (TMDA 51.3 fortified water and TMDA 28.3 fortified water). This colorimetric strategy was displayed excellent selectivity for Ga(III) over other examined ions. Additionally, the colorimetric method was properly used to detect the concentrations of Ga in tap water and certified reference material samples with recoveries ranging from 95.4 to 102.0%, displaying that the colorimetric procedure could be safely used for a realistic application.
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Affiliation(s)
- Asiye Aslıhan Avan
- Department of Chemistry, Faculty of Engineering, İstanbul University-Cerrahpaşa, İstanbul Turkey
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Nimesulide Determination on Carbon Black-Nafion Modified Glassy Carbon Electrode by Means of Adsorptive Stripping Voltammetry. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00676-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AbstractAdsorptive Stripping Voltammetric method for Nimesulide (NIM) determination was developed. As a working electrode, glassy carbon electrode (GCE) modified with carbon black and Nafion (CB-Nafion GCE) was used. All measurements were carried out in 0.1 M acetate buffer (pH 4.6). Conducted experiments allowed to optimize differential pulse voltammetry (DPV) instrumental parameters: sampling and waiting time ts = tw = 10 ms, step potential Es = 4 mV, and pulse amplitude ΔE = 50 mV. The best results were obtained for preconcentration potential and time equal to 400 mV and 20 s, respectively. Limit of detection was calculated and was equal to 0.14 µM for 20-s preconcentration time and 0.06 µM for 40-s preconcentration time. In order to prove the applicability of the developed method, concentration of nimesulide in pharmaceutical products was determined. Calculated recoveries were in the range 94–99%, which indicates that the method might be assumed as accurate. Coefficient of variation was equal to 5.0% (n = 7, NIM concentration 1 µM) Obtained results of NIM determination were in good agreement with the content declared by producers.
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Wasąg J, Grabarczyk M. Application of adsorptive stripping voltammetry based on PbFE for the determination of trace aluminum released into the environment during the corrosion process. Talanta 2021; 233:122565. [PMID: 34215061 DOI: 10.1016/j.talanta.2021.122565] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/19/2021] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
This work presents a new fast and sensitive method for voltammetric determination of Al(III) as Al(III)-cupferron complexes, which was used for the analysis of solution after exposure of aluminum alloy AA2024. Experimental conditions of voltammetric measurement such as preconcentration time, potential, and operating parameters were optimized. The formed Al(III)-cupferron complexes were adsorbed on an in situ plated lead film electrode (PbFE) using the potentials of -1.2 V (15 s) and -0.7 V (60 s) versus Ag/AgCl electrode. The promising results were obtained in 0.1 mol L-1 ammonia buffer at pH = 8.15 and 6 ∙ 10-5 mol L-1 Pb(II), 3 ∙ 10-4 mol L-1cupferron. The calibration graph was linear from 1 ∙ 10-10 to 2 ∙ 10-7 mol L-1 with the calculated detection limit of 3.3 ∙ 10-11 mol L-1, repeatability with RSD of 4.9% (n = 5). The accuracy was established by analysis of the synthetic sample.
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Affiliation(s)
- Joanna Wasąg
- Department of Materials Engineering, Institute of Engineering and Technical Sciences, Faculty of Natural Sciences and Health, The John Paul II Catholic University of Lublin, 20-950 Lublin, Poland.
| | - Malgorzata Grabarczyk
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland.
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Gorska M, Pohl P. Comparison of the performance of atmospheric pressure glow discharges operated between a flowing liquid cathode and either a pin-type anode or a helium jet anode for the Ga and In determination by the optical emission spectrometry. Talanta 2021; 226:122155. [PMID: 33676703 DOI: 10.1016/j.talanta.2021.122155] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/20/2021] [Accepted: 01/24/2021] [Indexed: 02/06/2023]
Abstract
Novel atmospheric pressure glow discharge (APGD) microplasma systems, sustained between a miniaturized flowing liquid cathode (FLC) and either a pin-type anode or a He nozzle jet were investigated for the determination of Ga and In by the optical emission spectrometry (OES). The most influential working parameters, i.e., solution flow rate, acid concentration, discharge current, and He flow rate, were optimized for both studied systems. Furthermore, the effect of the addition of low molecular weight organic compounds (LMWOCs) into the FLC solution on the signals intensity of Ga and In was investigated. Subsequently, the impact of concomitant ions on the signals intensity of Ga and In was thoroughly studied and it was established that both studied methods are relatively resistant to matrix effects. Under the optimized conditions, the detection limits (DLs, assessed on the basis of the 3σ criterion) of the studied elements were similar for both discharges and ranged between 1.8 and 2.3 μg L-1 for Ga and 0.37-0.40 μg L-1 for In. The received DLs were therefore better than those obtained for other spectrometric methods being premised upon microplasma systems and comparable with those obtained by currently employed large-scale instrumentation. The system with the pin-type anode was successfully applied for the Ga and In determination in four leachates of solders and electronic scrap as well as river water, using external calibration with simple standard solutions. The received results were compared to those obtained from ICP-OES or ICP-MS measurements and their recoveries were fallen within the range of 98-114%, confirming the excellent accuracy and reliability of the developed FLC-APGD-OES method.
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Affiliation(s)
- Monika Gorska
- Wroclaw University of Science and Technology, Faculty of Chemistry, Division of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50-370, Wroclaw, Poland.
| | - Pawel Pohl
- Wroclaw University of Science and Technology, Faculty of Chemistry, Division of Analytical Chemistry and Chemical Metallurgy, Wybrzeze Stanislawa Wyspianskiego 27, 50-370, Wroclaw, Poland
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Górska A, Paczosa-Bator B, Piech R. Highly Sensitive Levodopa Determination by Means of Adsorptive Stripping Voltammetry on Ruthenium Dioxide-Carbon Black-Nafion Modified Glassy Carbon Electrode. SENSORS (BASEL, SWITZERLAND) 2020; 21:E60. [PMID: 33374345 PMCID: PMC7795949 DOI: 10.3390/s21010060] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 11/16/2022]
Abstract
A new, highly sensitive Adsorptive Stripping Voltammetric method for levodopa determination was developed. As a working electrode, the glassy carbon electrode (GCE) modified with carbon black (CB), RuO2·xH2O (RuO2) and Nafion was used (CB-RuO2-Nafion GCE). Levodopa signal obtained on the modified electrode was 12 times higher compared to GCE. During research, instrumental parameters were optimized: sampling time ts = 10 ms, waiting time tw = 10 ms, step potential Es = 5 mV and pulse amplitude ΔE = 50 mV. Preconcentration potential Eprec was equal to 0 mV. The best results were obtained in 0.025 M perchloric acid (approx. pH 1.4). Signal repeatability measured on the CB-RuO2-Nafion modified electrode for 0.2 µM of levodopa was equal to 2.1% (levodopa concentration 1 µM, n = 5). Linearity of the method was achieved in the concentration range from 1 to 8 µM. Limit of detection was equal to 17 nM. Recoveries calculated for pharmaceutical products and tap water measurements were in the range 102-105%, which confirms the accuracy of the developed. The applicability of the method was confirmed by analysis of pharmaceutical products and tap water samples. Based on obtained results, it might be concluded that the developed voltammetric method could be a useful tool in routine drug analysis.
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Affiliation(s)
| | | | - Robert Piech
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland; (A.G.); (B.P.-B.)
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Nunes CN, Dos Anjos VE, Quináia SP. Are there pharmaceutical compounds in sediments or in water? Determination of the distribution coefficient of benzodiazepine drugs in aquatic environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:522-529. [PMID: 31103012 DOI: 10.1016/j.envpol.2019.05.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 05/03/2019] [Accepted: 05/04/2019] [Indexed: 06/09/2023]
Abstract
Alprazolam, clonazepam and diazepam are drugs belonging to the benzodiazepine class. These drugs might be important environmental contaminants in aquatic media. A total understanding of behavior and fate of drugs in aquatic environment is not available for these and other drugs. Thus, in this work, a complete optimization of sample treatment and extraction of analytes from sediments and water was described, as well a study of sediment/water distribution comparing it with sample characteristics. Ultrasound for 10 min and 3 steps using 3 mL of extraction solvent were chosen as the stirring form for extraction. A methanol/water (1:1) solution pH 12 was the best extraction solvent. Aiming to eliminate interferences, an addition of 10 μL of NaCl 3.06 mol L-1 was necessary after each step of extraction. Sediment and water samples were characterized, presenting different values on physical-chemical parameters. Six distinct sample sets of water and sediments were spiked with each benzodiazepine and analyzed. Kd values varied from 1.4 to 9.2 L kg-1 for clonazepam, 1.8-11.5 L kg-1 for alprazolam and 2.31-12 L kg-1 for diazepam. A principal component analysis showed high dependence on Kd with sample characteristics mainly related to sediments. In the systems, whose sediments presented high levels of clay, silt and organic matter, the drugs presented a great interaction with the solid part of the system, increasing the Kd value. Koc values varied from 149.25 to 634.13 L kg-1 for clonazepam, 186.57-852.48 L kg-1 for alprazolam, and 194.68-1189.81 L kg-1 for diazepam.
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Affiliation(s)
| | | | - Sueli Pércio Quináia
- Universidade Estadual do Centro-Oeste, UNICENTRO, 85040-080, Guarapuava, Brazil.
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Nuñez RN, Moreno Betancourth J, Ortiz PI, Pfaffen V. Voltammetric Quantification of 4-Nitrophenol Using a Multivariate Optimized Plated Bismuth Film Electrode. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rodrigo N. Nuñez
- INFIQC−CONICET and Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
| | | | - Patricia I. Ortiz
- INFIQC−CONICET and Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
| | - Valeria Pfaffen
- INFIQC−CONICET and Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina
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Górska A, Paczosa‐Bator B, Piech R. Highly Sensitive AdSV Method for Fe(III) Determination in Presence of Solochrome Violet RS on Renewable Amalgam Film Electrode. ELECTROANAL 2019. [DOI: 10.1002/elan.201900204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Anna Górska
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków al. Mickiewicza 30 Poland
| | - Beata Paczosa‐Bator
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków al. Mickiewicza 30 Poland
| | - Robert Piech
- Faculty of Materials Science and CeramicsAGH University of Science and Technology 30-059 Kraków al. Mickiewicza 30 Poland
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12
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Kaplun MM, Ivanov VD. Electrochemical Reduction of Vanadium(V)‐Cupferron Complex, VO(cupf)
2
OH. ELECTROANAL 2019. [DOI: 10.1002/elan.201800695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Marina M. Kaplun
- St. Petersburg State UniversityInstitute of Chemistry 7–9 Universitetskaya Emb. St Petersburg 199034 Russia
- Present address: 3M Company, 3M Center, St. Paul Minnesota 55144 USA
| | - Vladimir D. Ivanov
- St. Petersburg State UniversityInstitute of Chemistry 7–9 Universitetskaya Emb. St Petersburg 199034 Russia
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13
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Grabarczyk M, Adamczyk M. Bismuth film electrode and chloranilic acid as a new alternative for simple, fast and sensitive Ge( iv) quantification by adsorptive stripping voltammetry. RSC Adv 2018; 8:15215-15221. [PMID: 35541364 PMCID: PMC9080125 DOI: 10.1039/c8ra01160e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 03/26/2018] [Indexed: 11/21/2022] Open
Abstract
An analytical procedure regarding the voltammetric determination of germanium(iv) by adsorptive stripping voltammetry (AdSV) exploiting the in situ plated bismuth film electrode (BiFE) is described. The use of mercury free electrode as a working electrode is the first time proposed in AdSV germanium determination. The method is based on adsorptive accumulation of the Ge(iv)–chloranilic acid complex at a BiFE by a nonelectrochemical process followed by the cathodic stripping step. Experimental variables, including bismuth and chloranilic acid concentrations, deposition potential and time were carefully optimized. Under optimized conditions the cathodic stripping peak current was directly proportional to the concentration of Ge(iv) in the range from 3 × 10−9 to 1.5 × 10−7 mol L−1 with the correlation coefficient 0.997. Because the AdSV technique could be invalidated due to real samples matrix the influence of foreign ions, surface active substances, and humic substances on the Ge(iv) signal was precisely examined. The satisfying minimization of potential matrix interferences was also suggested. Analytical results of natural water samples analysis showed that the proposed procedure of trace germanium(iv) determination is suitable for direct environmental water analysis. An analytical procedure regarding the voltammetric determination of germanium(iv) by adsorptive stripping voltammetry (AdSV) exploiting the in situ plated bismuth film electrode (BiFE) is described.![]()
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Affiliation(s)
| | - Marzena Adamczyk
- Faculty of Chemistry
- Maria Curie-Sklodowska University
- 20-031 Lublin
- Poland
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Nogueira Nunes C, Egéa dos Anjos V, Pércio Quináia S. Determination of Diazepam and Clonazepam in Natural Water - a Voltammetric Study. ELECTROANAL 2017. [DOI: 10.1002/elan.201700566] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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Investigating the Electrical and Thermal Characteristics of Bismuth/(Polyvinyl alcohol/Acrylic Acid) Nanocomposites Membranes Prepared by Ionizing Radiation. J Inorg Organomet Polym Mater 2016. [DOI: 10.1007/s10904-016-0476-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Gerent GG, Spinelli A. Environmentally-friendly in situ plated bismuth-film electrode for the quantification of the endocrine disruptor parathion in skimmed milk. JOURNAL OF HAZARDOUS MATERIALS 2016; 308:157-163. [PMID: 26812083 DOI: 10.1016/j.jhazmat.2016.01.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/30/2015] [Accepted: 01/14/2016] [Indexed: 06/05/2023]
Abstract
An in situ bismuth-film electrode (BiFE) together with square-wave cathodic voltammetry (SWCV) was used to determine the concentration of the endocrine disruptor parathion in skimmed milk. The experimental conditions (deposition time, deposition potential and Bi (III) concentration) were optimized for the preparation of the BiFE. A glassy carbon electrode was used as the substrate. The selection of the chemical composition of the supporting electrolyte and the solution pH was aimed at improving the reduction of parathion at the BiFE surface. In addition, the parameters of the square-wave cathodic voltammetry were adjusted to improve the sensor performance. A cathodic current identified at -0.523 V increased linearly with the parathion concentration in the range of 0.2-2.0 μmol L(-1) (R=0.999). The sensitivity of the calibration curve obtained was 4.09 μA L μmol(-1), and the limits of detection (LOD) and quantification (LOQ) were 55.7 nmol L(-1) and 169.0 nmol L(-1), respectively. The performance of the sensor was tested using a sample of skimmed milk with parathion added. The same determination was carried out by UV-vis spectroscopy and the results obtained were used for the statistical evaluation of the data obtained.
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Affiliation(s)
- Giles G Gerent
- Grupo de Estudos de Processos Eletroquímicos e Eletroanalíticos, Universidade Federal de Santa Catarina, Campus Universitário Reitor João David Ferreira Lima, Departamento de Química-CFM, 88040-900, Florianópolis SC, Brazil
| | - Almir Spinelli
- Grupo de Estudos de Processos Eletroquímicos e Eletroanalíticos, Universidade Federal de Santa Catarina, Campus Universitário Reitor João David Ferreira Lima, Departamento de Química-CFM, 88040-900, Florianópolis SC, Brazil.
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