Article
Chemistry, Analytical
Kequan Xu, Clara Perez-Rafols, Amine Marchoud, Maria Cuartero, Gaston A. Crespo
Summary: The use of HMDE for multi-ion analysis offers unique advantages such as good reproducibility and superior detection performance, but its continued usage is questioned due to the high toxicity of mercury. Research has demonstrated the HMDE's ability to rapidly and accurately analyze multiple metal ions in complex matrices. Further efforts are needed to definitively replace the HMDE in electroanalysis despite elegant alternatives proposed in the literature.
Article
Chemistry, Analytical
Julius Gajdar, Kristina Stafurova, Jiri Barek, Jan Fischer
Summary: A novel retractable-pen-based renewable silver amalgam film electrode (RAE) was introduced for electrochemical sensing of electrochemically reducible compounds, offering good repeatability and low limit of quantification for environmental pollutant detection. This electrode utilizes mechanisms found in a common retractable ballpoint pen for mechanical renewal of the amalgam film.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Kristyna Jelsikova, Polina Yershova, Lukas Fojt, Miroslav Fojta, Karolina Schwarzova-Peckova
Summary: The electrochemical and adsorption behavior of bile acids on a mercury drop electrode was investigated. The results showed that the behavior depended on the number of hydroxyl groups on the steroid skeleton and was influenced by pH, concentration, temperature, and the presence of halides.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Veronika Svitkova, Katarina Nemcekova, Vlastimil Vyskocil
Summary: In this study, a mercury meniscus-modified silver solid amalgam electrode was used for the detection of UV-induced DNA damage. The integrity of the double-stranded DNA layer was indirectly detected using methylene blue reduction, and different wavelengths of UV irradiation resulted in different electrochemical signals.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Anna Gorska, Beata Paczosa-Bator, Marek Szlosarczyk, Robert Piech
Summary: A new highly sensitive voltammetric method for captopril determination was developed using a renewable amalgam film electrode. The method showed low detection limit and good linearity range, suitable for analyzing samples such as tablets containing CPT and urine.
Article
Chemistry, Analytical
Andrii Dmukhailo, Sofiia Tvorynska, Liliya Dubenska
Summary: This research paper investigates the electrochemical reduction of the synthetic food azo dye tartrazine (TZ) on three different types of silver solid amalgam electrodes (AgSAEs). The study compares the performance of AgSAEs with dropping mercury electrode. The results show that m-AgSAE using LS-AdSV offers the best limit of detection (0.078 mu mol L-1) and the limit of quantification (0.24 mu mol L-1) for TZ determination.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Electrochemistry
Veronika Svitkova, Vlastimil Vyskocil
Summary: Cyclic voltammetry and differential pulse voltammetry were used to study the behavior of methylene blue at a mercury meniscus-modified silver solid amalgam electrode. Electrochemical impedance spectroscopy was used for verification and comparison. It was found that the reduction signal of methylene blue was significantly higher at the DNA-modified silver amalgam electrode compared to the unmodified electrode, which correlated with changes in charge transfer resistance. Optimized parameters were determined for further biosensor development and applications.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Pavlina Havranova, Lukas Fojt, Lukas Kejik, Tomas Sikola, Miroslav Fojta, Ales Danhel
Summary: The electrodeposition of silver amalgam particles on screen-printed silver electrodes optimized for the detection of electrochemically reducible compounds. The method allowed for sensitive detection of organic compounds and artificial nucleosides, as well as proteins, showcasing potential applications in chemical and synthetic biology research.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Marco Antonio Modenes Junior, Maisa Azevedo Beluomini, Nelson Ramos Stradiotto
Summary: This study developed a simple, quick, and sensitive adsorptive stripping voltammetry (AdSV) method based on a solid amalgam electrode to determine sulfur in biodiesel. The method displayed good response and recovery values and could provide a fast assessment of the quality of biodiesel.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Analytical
Arash Rabiee, Davood Nematollahi
Summary: A cathodic stripping voltammetry method was developed using hanging mercury drop electrode (HMDE) for the determination of natamycin in dairy samples. The effect of various metallic ions, including Ni(II), on enhancing the weak signal of natamycin on HMDE was investigated. The method proved to be reliable and convenient for routine analysis of natamycin, replacing sophisticated HPLC methods. The concentration of natamycin in cheese and yoghurt drink was successfully evaluated using this method.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Wafa Farooq Badulla, Saniye Ozcan, Zeki Atkosar, Goksel Arli
Summary: The study successfully determined ESC-OX in human urine and different pharmaceutical dosage forms using electrochemical method, with reliable and accurate results obtained under optimized conditions.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
Uarlei Douglas dos Santos, Djenaine De Souza, Sergio Antonio Spinola Machado
Summary: This study presents a method for the determination of folic acid (FA) using polished silver solid amalgam electrode (p-AgSAE) and square wave voltammetry. The experimental and voltammetric parameters were optimized, and a well-defined voltammetric peak was observed on the p-AgSAE surface, indicating a reversible redox reaction involving reactant and product adsorption. A linear relationship between peak current and FA concentration was established, with a wide concentration range, high correlation coefficient, and good precision. The method was successfully applied to FA determination in spinach and corn chip samples, demonstrating the robustness of the proposed methodology and the advantages of using p-AgSAE as an alternative electrode.
JOURNAL OF ANALYTICAL CHEMISTRY
(2023)
Article
Electrochemistry
Agata Roguska, Adam Lesniewski, Marcin Opallo, Wojciech Nogala
Summary: Catalase is able to catalyze the oxygen reduction reaction on a mercury-gold amalgam microelectrode with a decreased activation energy, while inhibiting the background oxygen reduction reaction on the amalgam surface. Additionally, it facilitates the hydrogen evolution reaction.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Kristina Stafurova, Julius Gajdar, Jiri Barek, Jan Fischer
Summary: The novel RAE design, utilizing mechanisms from a retractable ballpoint pen, allows for mechanical renewal of the amalgam film. With a minimum amount of liquid amalgam providing several months of use, portability, long-term stability, simple surface renewal, and a wide cathodic potential window, the RAE is a suitable alternative to traditional mercury electrodes for the determination of cadmium (II). The obtained LOQ for cadmium (II) in acetate buffer at pH 4.8 was determined to be 54 nmol L-1 (6.1 ppb).
Article
Electrochemistry
Daniel Dobrovodsky, Ales Danhel, Emmanuelle Mothes-Martin, Genevieve Pratviel, Jean-Louis Mergny, Miroslav Fojta
Summary: This study investigated the interactions of two porphyrins with ODNs forming or not forming G4 structures, finding that they interacted strongly with G4 but Cu-TMPy2PP also interacted with double-stranded and single-stranded ODNs. Cyclic voltammetry was able to distinguish between free and bound forms of Cu-TMPy2PP, but not between binding of the ligand to ODNs with or without G4 propensity.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Renata Selesovska, Tomas Navratil, Vojtech Hrdlicka, Pavol Michniak, Michal Hatala, Marian Vojs, Marian Marton, Oleksandr Matvieiev, Lenka Janikova, Jaromira Chylkova
Summary: A novel lab-made disposable screen-printed sensor with chemically deposited boron-doped diamond was characterized and compared to other types of electrodes. It was successfully applied for the determination of atomoxetine and exhibited excellent detection performance and repeatability.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Alona Usenko, Jaromira Chylkova, Renata Selesovska, Milos Sedlak, Jiroi Vana, Jan Bartacek, Tomas Mikysek
Summary: In this study, a direct electrochemical oxidation method was used to simultaneously determine growth regulator daminozide (DMZ) and its degradation product N,N-dimethylhydrazine (DMH). The oxidation mechanism of DMZ was proposed. A sensitive differential pulse voltammetric method was developed for the determination of both substances, and an extraction technique was utilized to enhance the detection limits. The presence of DMH significantly affected the results of DMZ analysis, and a method for DMH removal was also developed. Real samples were successfully analyzed.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Analytical
Marta Katarzyna Choinska, Ivana Sestakova, Vojtech Hrdlicka, Jana Skopalova, Jan Langmaier, Vitezslav Maier, Tomas Navratil
Summary: The review provides a comprehensive overview of the identification and determination methods for new synthetic opioids, focusing on the application of electrochemical methods and separation techniques. These methods are crucial for fast and accurate diagnosis of intoxication, and are of great importance in clinical and forensic fields.
Article
Public, Environmental & Occupational Health
Pavlina Klusackova, Sarka Duskova, Jaroslav Mraz, Tomas Navratil, Stepanka Vlckova, Daniela Pelclova
Summary: This study assessed the health effects of exposure to isocyanates and found that fractional exhaled nitric oxide (FeNO) and biological exposure test (BET) are important parameters for early detection of isocyanate-related allergic diseases.
CENTRAL EUROPEAN JOURNAL OF PUBLIC HEALTH
(2022)
Article
Chemistry, Analytical
Oleksandr Matvieiev, Renata Selesovska, Marian Vojs, Marian Marton, Pavol Michniak, Vojtech Hrdlicka, Michal Hatala, Lenka Janikova, Jaromira Chylkova, Jana Skopalova, Petr Cankar, Tomas Navratil
Summary: A new screen-printed sensor with a boron-doped diamond working electrode was fabricated using a large-area linear antenna microwave chemical deposition vapor system. The sensor combines the advantages of disposable printed sensors with the excellent electrochemical properties of the boron-doped diamond electrode. The sensor's feasibility and applicability were verified through various experiments and analysis.
Article
Chemistry, Analytical
Renata Selesovska, Romana Sokolova, Kateroina Krejcova, Karolina Schwarzova-Peckova, Tomas Mikysek, Oleksandr Matvieiev
Summary: The first study on the electrochemical oxidation of triazole fungicide tebuconazole was conducted using an oxygen-terminated boron-doped diamond electrode. The research explored the irreversible anodic process occurring at +1.75 V (vs Ag/AgCl/KCl(sat.)) in 0.1 mol/L HNO3 through various techniques such as cyclic voltammetry, IR spectroelectrochemistry, and density functional theory calculations. The study provided insights into the oxidation mechanisms, revealing the formation of hydroxylated and dihydroxylated derivatives as well as an o-quinone derivative.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Alona Usenko, Jaromira Chylkova, Jiri Vana, Oleksandr Matvieiev, Lenka Janikova, Renata Selesovska
Summary: The electrochemical oxidation of Paclobutrazol (PBZ) was investigated for the first time. PBZ showed an irreversible anodic peak on a boron-doped diamond electrode (BDDE) over a wide pH range. The mechanism of electrochemical oxidation of PBZ was proposed based on LC-MS analysis. A method for determination of PBZ using differential pulse voltammetry with BDDE was developed.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Review
Electrochemistry
Vojtech Hrdlicka, Oleksandr Matvieiev, Tomas Navratil, Renata Selesovska
Summary: This review summarizes recent developments in the modification of boron-doped diamond electrodes (BDDEs) and their applications in various fields such as biosensing, electroanalysis, electrosynthesis, fuel cell construction, and CO2 reduction. The different modification procedures, including metal or metal oxide modifications and polymer modifications, are described. Additionally, the use of DNA, enzymes, and other biomolecules for specific sensing capabilities is discussed. These chemical modifications are critically compared to other strategies for BDDEs.
ELECTROCHIMICA ACTA
(2023)
Review
Chemistry, Physical
Pavlina Keliskova, Oleksandr Matvieiev, Lenka Janikova, Renata Selesovska
Summary: This review discusses the recent advancements in the application of screen-printed electrodes (SPE) in drug analysis over the past three years. Unmodified SPE provide rapid drug screening and detection, aid in forensic analysis, and contribute to the fight against drug proliferation. Modified SPE enhance sensitivity and selectivity, enabling precise analysis of drugs in complex samples.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
