Article
Food Science & Technology
Han Chen, Yao Yao, Chao Zhang, Jianfeng Ping
Summary: It is significant to establish effective detection methods for heavy metal pollution in infant milk powder. In this study, a screen-printed electrode (SPE) modified with nanoporous carbon (NPC) was used to detect Pb(II) and Cd(II) in infant milk powder using an electrochemical method. The use of NPC as a functional nanolayer facilitated the electrochemical detection of Pb(II) and Cd(II) due to its efficient mass transport and large adsorption capacity. The developed SPE/NPC showed the ability to detect Pb(II) and Cd(II) in milk powder based on the performance in the extracted infant milk powder.
Article
Engineering, Multidisciplinary
Gustavo Murilo Alves, Jose Luiz da Silva, Nelson Ramos Stradiotto
Summary: This paper presents the development and application of a citrus pectin-modified carbon paste electrode for the electrochemical detection of copper in biofuel. The sensor showed enhanced current response and excellent performance characteristics, making it a reliable tool for quality control in commercial bioethanol production.
Article
Chemistry, Physical
Elif Tuzun, Gulten Atun
Summary: In this study, a titania-modified carbon paste electrode was prepared and used for the determination of trace amounts of hazardous Hg(II), Cu(II), and Pb(II) ions. The electrode exhibited excellent sensing performance with a low detection limit for each ion. In ternary solutions, the electrode showed higher sensitivity towards Hg(II) and Pb(II) ions. Therefore, the titania-modified carbon paste electrode is a promising sensor for the determination of hazardous heavy metal ions.
Article
Chemistry, Analytical
Anna Gorska, Beata Paczosa-Bator, Justina Gaidukevic, Robert Piech
Summary: This study proposes a new voltammetric method for the determination of ACL in pharmaceutics, urine, and plasma. The modified electrode used in this method exhibits good repeatability and sensitivity, and its preparation process is simple, fast, and cost-effective. The method is validated through calibration and recovery analysis, demonstrating its accuracy and applicability in routine laboratory practice.
Article
Chemistry, Analytical
Thi Kim Thuong Nguyen, Thi Huong Giang Le, Nhan Thi Thanh Pham, Thi Hoa Hoang, Ha Phuong Nguyen, Mua Xuan Nguyen, Minh Huong Giang Dang, Huy Hoang Do, Thi Thao Ta, Xuan Thanh Bui
Summary: In this study, a glassy carbon electrode modified with electrochemical reduced graphene oxide (ErGO/GCE) was used to determine amaranth in soft drink and candy samples by adsorptive stripping voltammetry. The ErGO/GCE was fabricated through an electrochemical reduction process, and the characteristics of the graphene oxide and reduced graphene oxide were studied. The optimal conditions for determining amaranth were determined, and the proposed method can be applied for amaranth dye analysis in food.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Najat Hamid Sibit, Mahmoud Roushani, Zahra Mirzaei Karazan
Summary: A novel sensor was developed using electropolymerization to modify a glassy carbon electrode for the fast determination of mercury ions in different samples. The sensor showed selective detection of mercury ions and displayed satisfactory recovery in various samples, with good reproducibility, repeatability, and stability.
Article
Electrochemistry
Afsaneh Seifi, Abbas Afkhami, Tayyebeh Madrakian
Summary: A novel low-cost method for simultaneous measurement of Cd2+ and Pb2+ using a modified glassy carbon electrode and square wave anodic stripping voltammetry (SWASV) has been developed. The method showed good sensitivity and reproducibility for both analytes under optimized conditions and was successfully applied in the analysis of real samples.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Haofan Wang, Yin Guo, Hongcheng Pan
Summary: A stripping voltammetric determination method using hierarchical dendritic gold nanostructure modified electrodes was developed for the sensitive determination of selenium and copper in water and food samples. The method showed good accuracy and high sensitivity, making it suitable for real sample analysis.
Article
Chemistry, Analytical
Vinitha Mariyappan, Naveen Karuppusamy, Shen-Ming Chen, Paulsamy Raja, Rasu Ramachandran
Summary: A WS2/GdCoO3 nanocomposite was successfully prepared using hydrothermal-assisted synthesis, exhibiting excellent performance for detecting quercetin on an electrode. The material showed good electrochemical response and selectivity.
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, 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
Margarita Stoytcheva, Roumen Zlatev, Zdravka Velkova, Velizar Gochev, Alan Ayala, Gisela Montero, Benjamin Valdez
Summary: A laponite-modified carbon paste electrode was successfully used for the voltammetric determination of 2,4-dichlorophenol, demonstrating increased surface area and catalytic activity. The sensitivity and quantification of 2,4-DCP in spiked tap water were validated, with results showing minimal interference from structurally similar phenols.
Review
Materials Science, Multidisciplinary
Jiewei Zheng, Md Arifur Rahim, Jianbo Tang, Francois-Marie Allioux, Kourosh Kalantar-Zadeh
Summary: Contamination of heavy metal ions poses a growing threat to human health and ecosystems, requiring effective analytic sensing techniques. Electroanalytical techniques, particularly stripping voltammetry, play a crucial role in detecting heavy metal ions at trace levels. Post-transition metals exhibit unique properties that enhance the performance of stripping voltammetry in heavy metal ion sensing applications.
ADVANCED MATERIALS TECHNOLOGIES
(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, Physical
Joanna Wasag, Malgorzata Grabarczyk
Summary: A copper film modified glassy carbon electrode and a novel copper film with carbon nanotubes modified screen-printed electrode were used for anodic stripping voltammetric measurement of ultratrace levels of Cd(II). The optimal electroanalytical performance of the working electrodes was achieved in electrolyte 0.1 M HCl and 2 x 10(-4) M Cu(II), with detection limits and repeatability values established for both types of electrodes. The calibration curves showed linear ranges for trace determination of cadmium in different environmental water samples.
Article
Chemistry, Applied
Khiena Brainina, Natalia Stozhko, Maria Bukharinova, Ekaterina Khamzina, Marina Vidrevich
Article
Chemistry, Analytical
Khiena Brainina, Aleksey Tarasov, Ekaterina Khamzina, Yan Kazakov, Natalia Stozhko
Article
Chemistry, Multidisciplinary
Natalia Yu Stozhko, Maria A. Bukharinova, Ekaterina Khamzina, Aleksey Tarasov, Marina B. Vidrevich, Khiena Z. Brainina
Article
Biochemistry & Molecular Biology
Khiena Brainina, Natalia Stozhko, Marina Vidrevich
Article
Chemistry, Applied
Khiena Brainina, Aleksey Tarasov, Ekaterina Khamzina, Natalia Stozhko, Marina Vidrevich
Article
Chemistry, Analytical
Natalia Yu Stozhko, Maria A. Bukharinova, Ekaterina Khamzina, Aleksey Tarasov, Sergey Sokolkov
Article
Chemistry, Analytical
Aleksey V. Tarasov, Ekaterina I. Khamzina, Maria A. Bukharinova, Natalia Yu. Stozhko
Summary: In contemporary bioanalysis, a new flexible potentiometric sensor system has been developed for non-invasive monitoring of human skin antioxidant activity. By utilizing low-cost materials and scalable technologies, reproducible and accurate results have been achieved.
Article
Chemistry, Analytical
Maria A. Bukharinova, Natalia Yu Stozhko, Elizaveta A. Novakovskaya, Ekaterina Khamzina, Aleksey Tarasov, Sergey Sokolkov
Summary: The paper discusses the development of a carbon veil-based electrode for determining uric acid in saliva. The electrode, when electrochemically activated, showed a high sensitivity and lower oxidation potential for uric acid.
Article
Chemistry, Analytical
Natalia Yu. Stozhko, Maria A. Bukharinova, Ekaterina I. Khamzina, Aleksey V. Tarasov
Summary: Gold nanoparticles, especially those synthesized by plants, have great potential in various applications, particularly in the field of sensors. However, the electrochemical properties of plant-synthesized nanoparticles have not been sufficiently studied. This study offers a comprehensive investigation into the electrochemical activity of plant-synthesized gold nanoparticles under different synthesis conditions, revealing the significant impact of plant extract quantity, antioxidant activity, and pH on their electrochemical behavior. Additionally, electrodes modified with plant-synthesized gold nanoparticles demonstrate superior analytical characteristics for detecting uric and ascorbic acids, suggesting promising applications in the development of highly effective epidermal sensors with good biocompatibility.
Article
Chemistry, Analytical
Natalia Yu Stozhko, Ekaterina Khamzina, Maria A. Bukharinova, Aleksey Tarasov
Summary: This paper describes the development of an electrochemical sensor for the determination of synthetic food colorants. The sensor exhibits good performance and can accurately and rapidly detect colorants in food.
Article
Chemistry, Multidisciplinary
Aleksey Tarasov, Anastasia Bochkova, Ilya Muzyukin, Olga Chugunova, Natalia Stozhko
Summary: The study demonstrates that slow freezing, fast freezing, microwave radiation, and cold atmospheric plasma treatments can enhance the antioxidant activity of coffee bean extracts. During the treatments, the moisture content of green coffee decreased, while that of roasted coffee increased. Additionally, combinations of different treatment methods resulted in a further increase in the antioxidant activity of both green and roasted coffee extracts.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Natalia Yu. Stozhko, Ekaterina I. I. Khamzina, Maria A. A. Bukharinova, Aleksey V. V. Tarasov, Veronika Yu. Kolotygina, Natalia V. V. Lakiza, Ekaterina D. D. Kuznetcova
Summary: This paper presents a novel eco-friendly sensing material based on carbon paper modified with functionalized graphene and phytosynthesized gold nanoparticles. The modified material showed increased electroactive surface area and improved electron transfer properties. The modified material was successfully used for the electrochemical sensing of the synthetic dye Ponceau 4R.
Review
Biology
Aleksey Tarasov, Natalia Stozhko, Maria Bukharinova, Ekaterina Khamzina
Summary: Plant phenolic compounds have bioactive properties and their determination is in high demand for life sciences and industry. Measuring individual phenolic compounds is complex due to the large number of identified substances. Biosensors based on phenol oxidases (POs) have been proposed as alternative devices, but their effectiveness in analyzing food and vegetal samples needs further investigation. This review discusses the properties of laccase and tyrosinase, as well as the development of enzymatic and bienzymatic sensors for estimating total phenolic index (TPI) in food-related samples using nanomaterials for improved performance.
Article
Education & Educational Research
Boris Bortnik, Natalia Stozhko, Irina Pervukhina
Summary: Testing as an assessment technique has been widely used in education. This study evaluated the impact of context-based testing in analytical chemistry teaching at a Russian university. The findings suggest that context-based testing can enhance knowledge development and contribute to a more solid understanding of fundamental concepts in analytical chemistry compared to traditional testing.
EDUCATION SCIENCES
(2021)
Article
Chemistry, Analytical
Natalia Stozhko, Maria Bukharinova, Leonid Galperin, Khiena Brainina
