Article
Chemistry, Analytical
Heleni Panagopoulou, Anastasios Economou, Christos Kokkinos
Summary: This paper introduces a 3D-printed microfluidic device for the determination of Pb(II) and Cd(II) using SIA-ASV method. The device enables online preconcentration and static solution detection, achieving low detection limits and good repeatability.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Hui Li, Jie Zhao, Shifan Zhao, Guofeng Cui
Summary: A novel three-electrode sensor was developed for simultaneous detection of Pb(II), Cd(II), and Zn(II) by depositing a bismuth film on a screen-printed gold working electrode. The sensor showed a wide linear range, low detection limits, good anti-interference ability, and stability. Such sensors are expected to be useful for portable heavy metal detection applications.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Enidale Yazie Muluneh, Menbere Leul Mekonnen, Siraye Esubalew Debebe
Summary: This study reported the use of Square Wave Anodic Stripping Voltammetry technique with a bismuth-modified glassy carbon electrode for the simultaneous determination of lead and cadmium content in paints. The results showed excellent percent recovery values and the Pb and Cd contents in these products have not been reported yet. The method is not significantly influenced by the paint matrix and can be used as an alternative analytical method for the determination of heavy metals in the paint matrix. The amount of Pb(II) and Cd(II) in the given paints are below the permissible levels based on the regulation of Ethiopia, indicating their safety for use in the country.
Article
Chemistry, Physical
Malgorzata Grabarczyk, Cecylia Wardak, Robert Piech, Agnieszka Wawruch
Summary: This study describes the practical application of a novel, eco-friendly electrochemical sensor based on low-dimensional structures, spherical glassy carbon microparticles, and multiwall carbon nanotubes. The sensor, modified with a bismuth film, was used for the determination of Cd(II) using anodic stripping voltammetry. The method showed good sensitivity with a linear range of 2 x 10(-9) to 2 x 10(-7) mol L-1 Cd(II) and a detection limit of 6.2 x 10(-10) mol L-1 Cd(II).
Article
Chemistry, Analytical
Reyhan Dincer, Sukriye Ulubay Karabiberoglu, Zekerya Dursun
Summary: This study proposes a dependable approach for the selective and sensitive identification of zinc, cadmium and lead in different sample matrices using an over-oxidized poly(xylenol blue) film glassy carbon electrode coated with bismuth (Bi/PXBov.ox/GCE). The best conditions for determining these elements were found to be a 0.1 mol L-1 acetate buffer solution as supporting electrolyte (pH 4.5), -1.5 V accumulation potential, and 180 s accumulation duration. Under these conditions, the detection limits of Zn(II), Cd(II) and Pb(II) were 3.20 μg L-1, 0.21 μg L-1 and 1.98 μg L-1, respectively. Moreover, this novel, cheap and easy-to-prepare Bi/PXBov.ox/GCE was successfully used for the analysis of Zn(II), Cd(II) and Pb(II) in lipstick samples, with consistent results compared to inductively coupled plasma mass spectrometry.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Minwoo Kim, Joohyung Park, Hyunjun Park, Wonjun Jo, Wonseok Lee, Jinsung Park
Summary: In this study, Nafion-blanketed bismuth nanoplates were developed for the ultrasensitive detection of heavy metals in water. The Nafion-blanketing method selectively adsorbs cadmium and lead ions. The ecofriendly bismuth nanoplates were synthesized using ultrasonic energy and used as electrochemical sensors due to their high affinity toward heavy metal ions. The Nafion-blanketed bismuth nanoplates exhibited outstanding sensing performance in real samples such as tap water and effluent, with detection limits of 0.376 nM for Cd2+ and 0.178 nM for Pb2+.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Muzammil M. N. Ahmed, Faieza S. Bodowara, Wendy Zhou, Juliana F. Penteado, Jessica L. Smeltz, Pavithra Pathirathna
Summary: Global concern over heavy metal contamination and its health effects has led to the implementation of various metal mitigation systems and regulatory approaches, but their efficiency is hindered by the lack of accurate metal speciation information. Therefore, there is a critical need for the development of novel, cost-effective, efficient, and robust metal detecting sensors. In this study, a nanopipet based electrochemical sensor was utilized to detect aqueous Cd(ii) ions, demonstrating high accuracy and efficiency in speciation detection.
Article
Chemistry, Analytical
Megumi Kasuno, Hitomi Osuga, Katsuya Shina, Takuya Yamazaki
Summary: A flow coulometric electroanalytical system was developed to determine the Pb(II) content with high efficiency and low detection limits. Selective determination of Pb(II) was successfully achieved by adjusting the electrodeposition potential.
Article
Chemistry, Analytical
Ibtihaj Albalawi, Anna Hogan, Hanan Alatawi, Eric Moore
Summary: This study introduces a simple, low-cost, sensitive, and environmentally friendly approach for simultaneous electrochemical determination of lead and cadmium using a commercial screen-printed gold electrode with Nafion and in situ bismuth film. The developed sensor showed high sensitivity and good repeatability with detection limits below EPA limits, making it suitable for analysis of river and tap water samples. By using anodic stripping square voltammetry, cyclic voltammetry, and scanning electron microscopy, the electrochemical properties and composite film characteristics were investigated.
SENSING AND BIO-SENSING RESEARCH
(2021)
Article
Electrochemistry
Domen Obrez, Mitja Kolar, Nikola Tasic, Samo B. Hocevar
Summary: Copper electrodes have interesting characteristics for electrochemical stripping analysis and can be an alternative to mercury electrodes. Different types of copper-based electrodes were studied for the detection of trace metal ions. Most of the copper electrodes showed favorable performances for stripping voltammetry.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Ceren Yildiz, Dilek Eskikoy Bayraktepe, Zehra Yazan, Muserref Onal
Summary: This study presents a electrochemical sensor based on pencil graphite electrode and its application in the quantification of heavy metals. The sensor has a high conductive surface area, capable of producing high signals, making it more suitable for electrochemical analysis compared to unmodified electrodes.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Mohammad Reza Jalali Sarvestani, Tayyebeh Madrakian, Abbas Afkhami
Summary: In this study, a highly sensitive electrochemical sensor was developed for the detection of ultra-trace levels of Pb2+. The sensor was modified with an in-situ electroplated bismuth film and a nanocomposite of a recently synthesized melamine based covalent organic framework and Fe3O4 nanoparticles. The combination of Fe3O4@SNW1 and the bismuth film significantly enhanced the sensitivity of the sensor towards Pb2+. The optimized sensor showed a linear response in the concentration range of 0.003-0.3 μmol L-1 with a detection limit of 0.95 nmol L-1. The sensor demonstrated good selectivity towards Pb2+ and was successfully applied for the determination of Pb2+ in different edible specimens.
Article
Electrochemistry
Marzena Adamczyk, Malgorzata Grabarczyk
Summary: A novel solid bismuth microelectrode combined with adsorptive stripping voltammetry was used to develop a simple and fast method for tin determination. The method involved the formation of a tin complex with cupferron in solution and deposition on the solid bismuth microelectrode. Optimal parameters were determined to achieve a linear response and a low detection limit for Sn(II), and interferences from foreign ions and organic matrix were studied.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(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, Multidisciplinary
Watsaka Siriangkhawut, Kraingkrai Ponhong, Piyanete Chantiratikul, Parita Mayotha
Summary: Stripping analysis using a bismuth-antimony film electrode was used to determine trace cadmium and lead in local rice wine. The pre-treatment parameters for sample mineralization were optimized, and linear calibration graphs were obtained for cadmium and lead. The developed method was successful and validated through flame atomic absorption spectrometry. Most samples were not contaminated, and one sample had a lower amount of cadmium than the maximum permitted level in wine.
