Article
Electrochemistry
Maria A. Tapia, Clara Perez-Rafols, Jan Pastika, Rui Gusmao, Nuria Serrano, Zdenek Sofer, Jose Manuel Diaz-Cruz
Summary: By drop-casting an exfoliated layered beta-antimony suspension, a modified screen-printed electrode called 2D Sb SPCE was created. It was used to simultaneously determine Pb(II) and Cd(II) through differential pulse anodic stripping voltammetry. The 2D Sb SPCE demonstrated excellent analytical performance with detection limits of 0.3 and 2.7 μg/L for Pb(II) and Cd(II) respectively, as well as a linear response range from 1.1 to 128.3 μg/L for Pb(II) and 9.1 to 132.7 μg/L for Cd(II).
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Gul Sirin Ustabasi, Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: The simultaneous determination of iron and copper using an unmodified screen printed carbon electrode and the complexation with o-phenanthroline assisted by the reducing agent ferrocyanide was successfully achieved. This method has low detection limits and a wide linear response range, allowing for the avoidance of interference between iron and copper and the simultaneous determination of low and high metal concentrations typically found in the environment. Analysis of a certified wastewater reference material confirmed the precision and accuracy of the proposed method.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Sayed A. M. Marzouk, Aisha R. Alyammahi, Pablo Fanjul-Bolado
Summary: This paper describes three novel cells for electrochemical measurements, offering convenient electrical connection, excellent SPEC sealing, and versatility for various applications with different sample volumes. Additionally, a new experimental method is presented.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Victor Padilla, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: A commercial and disposable screen-printed carbon electrode (SPCE) was proposed for fast, simple, and low-cost determination of Ni(II) at very low concentration levels by DPAdSV. The method achieved well-defined stripping peaks, linear dependence of peak area on Ni(II) concentration, and excellent reproducibility. The SPCE showed great potential for application in wastewater analysis, demonstrating remarkable trueness and very good reproducibility.
Article
Chemistry, Analytical
Jerson Gonzalez-Hernandez, Guillermo Moya-Alvarado, Ana Lorena Alvarado-Gamez, Roberto Urcuyo, Miriam Barquero-Quiros, Maria Julia Arcos-Martinez
Summary: Fentanyl, a synthetic opioid used for severe pain treatment, has become a growing threat to public health due to its increasing illegal recreational use. This study proposes a novel enzymatic biosensor for the rapid and reliable determination of fentanyl in urine samples, using adsorptive-stripping cyclic voltammetry. The biosensor showed high sensitivity, wide linearity range, and low detection limits, making it an efficient device for fentanyl detection.
Article
Chemistry, Physical
Jedrzej Kozak, Katarzyna Tyszczuk-Rotko, Magdalena Wojciak, Ireneusz Sowa, Marek Rotko
Summary: In this study, a screen-printed boron-doped electrode was electrochemically activated and used for analyzing rifampicin oxidation. The changes in surface morphology and behavior of rifampicin before and after activation were studied, showing improved analytical signal. Quantitative analysis of rifampicin was successfully carried out on the activated electrode, demonstrating satisfactory repeatability, reproducibility, and selectivity.
Article
Chemistry, Multidisciplinary
Guo Zhao, Thien-Toan Tran, Sidharth Modha, Mohammed Sedki, Nosang V. Myung, David Jassby, Ashok Mulchandani
Summary: This study presents multiplexed anodic stripping voltammetry detection of heavy metal ions using a homemade electrochemical cell with a 3D-printed flow cell. The sensor platform showed high selectivity and accuracy, with a potential applicability in complex matrices, achieving a 95-101% recovery rate in simulated river water.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Analytical
Alaine Sanchez, Ahmed Esmail Shalan, Maibelin Rosales, Idoia Ruiz de Larramendi, Francisco Javier del Campo
Summary: This work presents a methodology for developing functional metal-oxide based inks for screen-printing by growing nickel hydroxide on the surface of conducting microparticles using different particle to nickel salt ratios. The resulting particles are used as screen-printing inks for electrodes and test structures. The materials are characterized through various techniques and the screen printed electrodes exhibit capabilities for water oxidation and glucose oxidation, as well as electrochromism and an optical bandgap in the range of 4.06-4.15 eV. The approach is applicable to other metal oxides, expanding the possibilities for screen-printed semiconductors and catalysts.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Bohdan Josypcuk, Jan Langmaier, Sofiia Tvorynska
Summary: Silver amalgam screen-printed electrodes (AgA-SPEs) were designed, prepared, and tested as representatives among SPEs for measuring at high negative potentials, showing superior PHE values compared to traditional silver-SPEs. The practical application of AgA-SPEs was demonstrated by analyzing iodine content in table salt, with consistent results as declared by the manufacturer.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Matthew J. Whittingham, Nicholas J. Hurst, Robert D. Crapnell, Alejandro Garcia-Miranda Ferrari, Elias Blanco, Trevor J. Davies, Craig E. Banks
Summary: This paper explores the impact of changing the connection length of screen-printed electrodes (SPEs) on their resistance, finding that altering the connection length can improve the accuracy of heterogeneous electrode kinetics. It is recommended that in future use of SPEs, experimenters report the length and resistance of the working electrode connection to facilitate standardization across the field.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Elena Alberto, Julio Bastos-Arrieta, Clara Perez-Rafols, Nuria Serrano, M. Silvia Diaz-Cruz, Jose Manuel Diaz-Cruz
Summary: A DPV method using SPCEs was developed for the determination of SMX, showing a good detection limit (15 μg/L) and a wide linear range (50-600 μg/L) with good repeatability and reproducibility. The method was successfully applied to the analysis of a spiked tap water sample, demonstrating high reproducibility and good trueness. Additional considerations were made on the pH-dependent electrochemical oxidation of SMX and the role of the free terminal amino group in oxidation.
MICROCHEMICAL JOURNAL
(2023)
Article
Engineering, Chemical
Dana Stan, Andreea-Cristina Mirica, Rodica Iosub, Diana Stan, Nicolae Bogdan Mincu, Marin Gheorghe, Marioara Avram, Bianca Adiaconita, Gabriel Craciun, Andreea Lorena Bocancia Mateescu
Summary: This study evaluates the cleaning efficiency of different chemical compounds and cleaning methods for screen-printed electrodes, and concludes that the best cleaning method is using a solution of H2O2 and multiple cyclic voltammetry with a low scanning speed.
Article
Chemistry, Analytical
Paula Clares, Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: In this work, a simple, fast, sensitive, and low-cost method using a screen-printed carbon electrode (SPCE) was developed for the simultaneous determination of AA, PA, DX, and CF in both pharmaceutical formulations and environmental samples. The method exhibited linear dependence between the oxidative peak current and concentration, with low detection limits and good recoveries.
Article
Engineering, Electrical & Electronic
Dingnan Lu, Connor Sullivan, Eric M. Brack, Christopher P. Drew, Pradeep Kurup
Summary: The newly developed voltammetric approach shows excellent detection performance for trace mercury (II) and has practical significance for reliable prediction of mercury (II) concentration in complex media.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
David Majer, Matjaz Finsgar
Summary: This study developed a non-enzymatic sensor for the determination of the organophosphorus pesticide methyl parathion. By optimizing the experimental conditions and utilizing the multiple standard addition methodology, the accuracy and precision of the detection method were significantly improved.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Maria A. Tapia, Rui Gusmao, Clara Perez-Rafols, Xavier Subirats, Nuria Serrano, Zdenek Sofer, Jose Manuel Diaz-Cruz
Summary: This study demonstrates that exposing BP-based working electrodes to normal ambient conditions can enhance the performance of voltammetric sensing applications, with oxidized BP-SPCE showing improved analytical performance. The results highlight the potential of preparing and using BP-based sensors in normal ambient settings, with promising applications under physiological conditions.
Article
Chemistry, Analytical
Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: A hybrid sensing system combining cyclic voltammetric and UV-vis absorbance measurements was proposed and applied to beer classification. The system improved the classification power compared to using only one type of measurement. The developed PLS-DA model successfully discriminated between five types of beer and differentiated white-label brand beers from recognized brand beers.
Article
Chemistry, Analytical
Paula Clares, Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: In this work, a simple, fast, sensitive, and low-cost method using a screen-printed carbon electrode (SPCE) was developed for the simultaneous determination of AA, PA, DX, and CF in both pharmaceutical formulations and environmental samples. The method exhibited linear dependence between the oxidative peak current and concentration, with low detection limits and good recoveries.
Article
Chemistry, Analytical
Gul Sirin Ustabasi, Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: The simultaneous determination of iron and copper using an unmodified screen printed carbon electrode and the complexation with o-phenanthroline assisted by the reducing agent ferrocyanide was successfully achieved. This method has low detection limits and a wide linear response range, allowing for the avoidance of interference between iron and copper and the simultaneous determination of low and high metal concentrations typically found in the environment. Analysis of a certified wastewater reference material confirmed the precision and accuracy of the proposed method.
MICROCHEMICAL JOURNAL
(2022)
Article
Electrochemistry
Maria A. Tapia, Clara Perez-Rafols, Jan Pastika, Rui Gusmao, Nuria Serrano, Zdenek Sofer, Jose Manuel Diaz-Cruz
Summary: By drop-casting an exfoliated layered beta-antimony suspension, a modified screen-printed electrode called 2D Sb SPCE was created. It was used to simultaneously determine Pb(II) and Cd(II) through differential pulse anodic stripping voltammetry. The 2D Sb SPCE demonstrated excellent analytical performance with detection limits of 0.3 and 2.7 μg/L for Pb(II) and Cd(II) respectively, as well as a linear response range from 1.1 to 128.3 μg/L for Pb(II) and 9.1 to 132.7 μg/L for Cd(II).
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Analytical
G. Sirin Ustabasi, Julio Bastos-Arrieta, Clara Perez-Rafols, Nuria Serrano, Jose Manuel Diaz-Cruz
Summary: This paper discusses the potential application of spectroelectrochemistry (SEC) in reflection mode using screen-printed electrodes. The Fe(III)/Fe(II) - orthophenanthroline system is used as a model to study the electrochemical generation and consumption of a strongly absorbing substance. Various quantification methods, including cyclic voltammetry and chronoamperometric experiments, are explored. One interesting finding is that the absorbance evolves with the square root of time at a constant potential, which shows promise for the determination of Fe(III) ions at the micromolar level.
MICROCHEMICAL JOURNAL
(2022)
Article
Food Science & Technology
Josep Pages-Rebull, Clara Perez-Rafols, Nuria Serrano, Manel del Valle, Jose Manuel Diaz-Cruz
Summary: Recent increase in spice and aromatic herb adulteration in the food industry necessitates comprehensive quality control. A new HPLC method with UV-vis detection was developed for the characterization, identification, and authentication of various spices and herbs. Chromatographic separation and analysis using chemometric techniques demonstrated the feasibility of classifying these products based on their characteristic biomarkers. PLS-DA showed better classification performance than SIMCA.
Article
Chemistry, Analytical
Maria A. Tapia, Clara Perez-Rafols, Filipa M. Oliveira, Rui Gusmao, Nuria Serrano, Zdenek Sofer, Jose Manuel Diaz-Cruz
Summary: A two-dimensional Sb-modified screen-printed carbon nanofibers electrode (2D Sb-exf-SPCNFE) was developed to enhance the determination of Cd(II) and Pb(II) by stripping voltammetry, utilizing the synergistic effect between the two nanomaterials. The surface morphology of the 2D Sb-exf-SPCNFE was analyzed and compared to other modified and bare electrodes. The 2D Sb-exf-SPCNFE exhibited improved analytical parameters and higher sensitivities compared to other sensors, and was successfully applied to detect Cd(II) and Pb(II) traces in a certified estuarine water sample.
Article
Chemistry, Analytical
Ivet Jimenez, Clara Perez-Rafols, Nuria Serrano, Manel del Valle, Jose Manuel Diaz-Cuzc
Summary: A voltammetric sensor based on the modification of a screen-printed carbon electrode with reduced graphene oxide (rGO-SPCE) was developed for the determination of capsaicin. The sensor showed improved sensitivity and repeatability compared to other modified electrodes. It achieved a low limit of detection and provided accurate results for the determination of capsaicin in various samples.
MICROCHEMICAL JOURNAL
(2023)
