Article
Chemistry, Analytical
Ruihua Huang, Ke Zhang, Haowei Sun, Dafeng Zhang, Jian Zhu, Shuxing Zhou, Wenyan Li, Yongtao Li, Chunqiong Wang, Xiuxiu Jia, Thomas Wagberg, Guangzhi Hu
Summary: In this study, cetyltrimethylammonium bromide and zeolitic imidazolate framework-8 (ZIF-8) were assembled via chemical co-precipitation, and high-quality carbon-based metal-free nanomaterials were synthesized using heat treatment. The internal and morphological characteristics of hexagonal Star ZIF-8 were investigated. An electrochemical sensor with a good response to Cd(II) was prepared using Star ZIF-8 nanomaterial-modified electrodes. The sensitivity of the sensor was increased by five orders of magnitude.
ANALYTICA CHIMICA ACTA
(2022)
Article
Engineering, Environmental
Ruihua Huang, Jiapei Lv, Jianbing Chen, Yeling Zhu, Jian Zhu, Thomas Wagberg, Guangzhi Hu
Summary: This study proposes a boron and nitrogen co-doped carbon material derived from a metal-organic framework material for the detection of heavy metal ions in food. The sensor shows good sensitivity and selectivity for Cd(II) and Pb(II), and has potential applications in complex samples.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Analytical
Shi-Hua Chen, Zong-Yin Song, Xiang-Yu Xiao, Hong-Qi Huang, Yuan-Fan Yang, Pei-Hua Li, Meng Yang, Xing-Jiu Huang
Summary: Vacancy and doping engineering were used to improve the electrocatalytic ability of nanomaterials for detecting heavy metal ions. The P-doped material showed enhanced sensitivity and selectivity towards As(III), and the vacancies provided abundant electrons to form active centers.
ANALYTICAL CHEMISTRY
(2022)
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
Biochemistry & Molecular Biology
Siyamthanda Hope Mnyipika, Tshimangadzo Saddam Munonde, Philiswa Nosizo Nomngongo
Summary: This paper describes the successful fabrication of an electrochemical sensor by electrodeposition of MnO2 nanoparticles and RGO nanosheets, which significantly improved the detection of Zn(II), Cd(II) and Cu(II) ions in surface water. The modified sensor electrode exhibited high sensitivity, reproducibility, and stability for simultaneous determination of the three metal ions. The results demonstrate the potential of MnO2@RGO nanocomposite for early detection of heavy metals in water samples with enhanced sensitivity.
Article
Chemistry, Analytical
Hanaa S. El-Desoky, Amr M. Beltagi, Mohamed M. Ghoneim, Ahmed El-Hadad
Summary: An efficient and environmentally-friendly method for the simultaneous determination of three heavy metal ions was developed using modified electrodes. The use of nanomaterials significantly improved electron transfer processes, enabling preconcentration and detection of the metal ions. This sensor showed good selectivity, stability, and reproducibility, with low LOD values below the safety limits set by the WHO for drinking water.
MICROCHEMICAL JOURNAL
(2022)
Review
Environmental Sciences
Evelyne Dore, Darren A. Lytle, Lauren Wasserstrom, Jeff Swertfeger, Simoni Triantafyllidou
Summary: Field analyzers for lead in drinking water samples are gaining interest for their rapid, inexpensive, and simple quantification. This literature review compares the data quality of field analyzers to laboratory methods and provides practical information on commercial lead analyzers. Concerns about inadequate sample preparation potentially leading to underestimations are raised, but field analyzers have shown strengths in quickly obtaining results and detecting lead in certain situations.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Dionysios Soulis, Varvara Pagkali, Christos Kokkinos, Anastasios Economou
Summary: The fabrication method of ink-drawn fluidic electrochemical paper-based analytical devices (ePADs) for the determination of trace Pb(II) and Cd(II) has been reported. The ePADs are easy to fabricate, cost-effective, and suitable for on-site determination of Pb(II) and Cd(II) in environmental and food samples.
Article
Chemistry, Analytical
Antonella de las M. Biasi, Eduardo A. Takara, Maria L. Scala-Benuzzi, Agustina M. Valverde, Nidia N. Gomez, German A. Messina
Summary: Currently, there is a demand for fast and sensitive methods to monitor metals in water due to their increasing presence in the environment. This study evaluated different polymeric nanocomposites for the simultaneous electrochemical determination of Cu, Cd, and Zn in water samples. Screen-printed carbon electrodes were modified with nanocomposites containing graphene, graphite oxide, and polymers like polyethyleneimide, gelatin, and chitosan. The modified electrodes showed excellent performance for detecting metal ions in water samples using square-wave anodic stripping voltammetry.
ANALYTICA CHIMICA ACTA
(2023)
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, Multidisciplinary
Asmaa Galal Ali, Mahmoud Fatehy Altahan, Amr Mohamed Beltagi, Abla Ahmed Hathoot, Magdi Abdel-Azzem
Summary: This study introduces an electrochemical sensor with a carbon paste electrode modified with multiwall carbon nanotubes and poly(1-aminoanthraquinone) for the detection of selenite in water samples. The sensor exhibits good analytical performance and precision, making it applicable for wastewater analysis.
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
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
Chemistry, Physical
Shou-lian Wei, Liang-jie Yan, Xiang-jin Huang, Jian-wen Li, Su Yao, Hua-sheng Zhang, Ai-zhen Xu
Summary: This study developed a simple, effective, and sensitive electrochemical sensor based on a glassy carbon electrode modified with carboxylated carbon nanosheets and poly(glutamic acid) for simultaneous detection of trace amounts of Cd(II) and Pb(II). The sensor showed good performance in terms of sensitivity, selectivity, and could be applied for detection of Cd(II) and Pb(II) in water and rice samples.
Article
Chemistry, Analytical
Alexandra Karapa, Christos Kokkinos, Peter R. Fielden, Sara J. Baldock, Nickolas J. Goddard, Anastasios Economou
Summary: This work presents a novel three-electrode plastic sensor chip for the detection of trace Hg(II) using anodic stripping voltammetry. The chip is manufactured by injection moulding, which is an eco-friendly and sustainable method. It consists of three carbon-based electrodes embedded in a plastic holder, and the reference electrode is coated with Ag using e-beam evaporation. By analyzing the sample spiked with Au(III), gold nanoparticles are formed on the working electrode, and Hg(II) co-deposits with the gold nanoparticles to form an Au(Hg) amalgam. The accumulated Hg(II) is then stripped off the electrode and measured using an anodic square wave potential scan. The sensor shows a limit of detection of 0.4 μg/L for Hg(II) and a repeatability of 5.3% at the 20 μg/L level of Hg(III) (n = 10). It is successfully applied to various samples with recoveries ranging from 98% to 107%.
Article
Chemistry, Physical
Malgorzata Grabarczyk, Marzena Adamczyk, Cecylia Wardak
Article
Agronomy
Cecylia Wardak, Malgorzata Grabarczyk
INTERNATIONAL AGROPHYSICS
(2020)
Article
Chemistry, Physical
Marzena Adamczyk, Malgorzata Grabarczyk
Article
Chemistry, Analytical
Joanna Wasag, Malgorzata Grabarczyk
Summary: This work introduces a new fast and sensitive method for voltammetric determination of Al(III) as Al(III)-cupferron complexes, which was used for analyzing solutions from exposed aluminum alloy AA2024. Optimized experimental conditions and procedures led to promising results, with a linear calibration graph and good accuracy demonstrated through analysis of synthetic samples.
Article
Chemistry, Physical
Cecylia Wardak, Klaudia Morawska, Beata Paczosa-Bator, Malgorzata Grabarczyk
Summary: In this study, a new solid-contact ion-selective electrode sensitive to lead (II) ions was successfully prepared by modifying a polymer membrane with a nanocomposite of carbon nanofibers and an ionic liquid. The modified membrane showed improved properties, such as decreased resistance and increased capacitance and hydrophobicity. The electrode with 6% of the nanocomposite in the membrane, using a platinum wire as the internal electrode, demonstrated the best performance.
Article
Biochemistry & Molecular Biology
Malgorzata Grabarczyk, Edyta Wlazlowska
Summary: This paper discusses the use of an activated bismuth layer formed in situ on a solid bismuth microelectrode for the electrochemical sensitive determination of Ga(III) using anodic stripping voltammetry (ASV). The new electrode enhances sensitivity and outperforms a bismuth film electrode prepared on a glassy carbon disc. The optimized conditions allow for accurate determination of Ga(III) concentration over a wide range.
Article
Chemistry, Analytical
Joanna Smajdor, Beata Paczosa-Bator, Malgorzata Grabarczyk, Robert Piech
Summary: A new voltammetric method using modified glassy carbon electrodes was proposed for highly sensitive sumatriptan determination. The mixture of carbon black and titanium dioxide as electrode modifier resulted in good repeatability and sensitivity of measurements. The method was successfully applied for sumatriptan determination in complex matrices.
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, Physical
Malgorzata Grabarczyk, Edyta Wlazlowska, Agnieszka Wawruch
Summary: A method for voltammetric determination of tin using a multiwall carbon nanotubes/spherical glassy carbon electrode has been developed. The method involves the adsorptive accumulation of the Sn(II)-cupferron complex on the modified electrode surface, followed by electrochemical reduction of the adsorbed species. The method shows good sensitivity and accuracy for the determination of tin ions.
Review
Chemistry, Analytical
Cecylia Wardak, Karolina Pietrzak, Klaudia Morawska, Malgorzata Grabarczyk
Summary: This paper provides an overview of new materials used as solid contacts in ion-selective electrodes in recent years. These materials mainly consist of composite and hybrid materials, including combinations of carbon nanomaterials and polymers, as well as combinations of carbon and polymer nanomaterials with other materials such as metal nanoparticles, metal oxides, and ionic liquids. These composite materials often have improved mechanical, thermal, electrical, optical, and chemical properties compared to the original components. By increasing the capacitance and surface area of the material, they enhance the charge transfer process between the polymer membrane and the substrate material in the construction of ion-selective electrodes, resulting in sensors with better analytical performance and operational parameters.
Review
Chemistry, Physical
Edyta Wlazlowska, Malgorzata Grabarczyk
Summary: The main purpose of this review is to introduce methods of adsorptive stripping voltammetry for determining trace amounts of VO2(+) in various types of samples. The achieved detection limits using different working electrodes are presented. Factors influencing the obtained signal, including the complexing agent and working electrode selection, are discussed. The paper also analyzes the influence of foreign ions and organic matter on vanadium signal in natural samples, and presents methods of elimination related to surfactants in samples. The simultaneous determination of vanadium with other metal ions using adsorptive stripping voltammetry is characterized. The practical use of the developed procedures, mainly for analyzing food and environmental samples, is summarized in tabular form.
Article
Electrochemistry
Marzena Adamczyk, Malgorzata Grabarczyk
Summary: This study focused on determining the titanium content in stinging nettle leaves using adsorptive stripping voltammetry. The results confirmed the accuracy of the developed voltammetric procedure and its applicability in real sample analysis. The method proved to be effective in detecting titanium in stinging nettle leaves.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Marzena Adamczyk, Malgorzata Grabarczyk
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Chemistry, Physical
Cecylia Wardak, Malgorzata Grabarczyk, Joanna Lenik
PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING
(2019)
