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
Biochemistry & Molecular Biology
Chihyun Kim, Joohyung Park, Woochang Kim, Wonseok Lee, Sungsoo Na, Jinsung Park
Summary: In this study, an amyloid oligomer-reduced graphene oxide composite (AOrGOC) electrochemical sensor was developed for effective heavy metal ion detection. The AOrGOC sensor exhibited low detection limits for Cd2+ and Pb2+ and selectively detected these two heavy metal ions. The sensor also detected Cd2+ and Pb2+ in human plasma.
BIOELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Ying Li, Huan Huang, Rongli Cui, Dongmei Wang, Zi Yin, Dan Wang, Lirong Zheng, Jing Zhang, Yidong Zhao, Hui Yuan, Jinquan Dong, Xihong Guo, Baoyun Sun
Summary: Graphdiyne, a new carbon allotrope, showed efficient electrochemical sensor capability for detecting low concentrations of Cd2+ and Pb2+ in water. The study verified that acetylenic links in graphdiyne served as adsorbent sites for heavy metal ions, enhancing the sensor performance. This platform offers a promising direction for developing novel electrochemical sensors with high performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Azar Yousefi, Hossein Aghaie, Masoud Giahi, Laleh Maleknia
Summary: This paper investigates the electrochemical behavior of Cd2+ and Pb2+ sensing using polyindole (PIN)/Mn2O3 nanocomposite and PIN/Mn2O3/polyaniline (PANI) nanofibers modified on a glassy carbon electrode. The study varied the amount of (PIN)/Mn2O3 nanocomposite to find the best performance. The results show that the PIN/Mn2O3/PANI nanofibers modified electrode exhibits good linear relationships for Cd2+ and Pb2+ in the concentration range of 0.05-450 mu g L-1, with detection limits of 0.05 and 0.02 mu g L-1, respectively.
Article
Chemistry, Analytical
Wan-Fang Lin, Wen-Ying Zhai, Yun Yan, You-Qin Liu
Summary: A rod-like poly-tyrosine membrane modified glassy carbon electrode (p-Tyr/GC) and a Bi/p-Tyr/GC composite electrode were prepared and optimized for Pb2+ detection. The Bi/p-Tyr/GC electrode showed high sensitivity and wide linear range for Pb determination in preserved duck eggs, with successful elimination of Cu2+ interference. The developed electrochemical method has high selectivity and broad application potential for heavy metal ion sensors in complex samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Engineering, Environmental
Fengqian Xie, Feng Tang, Xinli Li, Xiaoran Wu, Shujun Wang, Hongqiang Xie, Ping Wang, Yueyun Li, Qing Liu
Summary: In this study, a strategy of co-movement catalysis based on photo-assisted electrochemical catalysis was proposed to construct a flexible electrochemical sensor for simultaneous detection of multiple heavy metal ions (HMIs). The sensor exhibited sensitive detection performance and showed potential in environmental monitoring.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Analytical
Aymara da Silva Santos, Carolina Zeni Pires Mecca, Tiago Luiz Ferreira, Fabio Ruiz Simoes, Lucia Codognoto, Eliana Maira Agostini Valle
Summary: The interaction between the pesticide carbendazim and the metal ion Pb2+ was studied using electrochemical techniques. The presence of Pb2+ affected the electrochemical signal of carbendazim, indicating complex formation. The electroanalytical method was found to be feasible for the analysis of carbendazim in the presence of Pb2+.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
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
Yan-Ru Wang, Wen-Ying Zhai, You-Qin Liu
Summary: A bud-like poly-L-tyrosine/Bi modified glassy carbon electrode was prepared for enriching Cd2+ with high sensitivity, wide linear range, and low detection limit. The developed sensor successfully detected Cd in rice samples with good reliability and accuracy, while effectively eliminating interference caused by Cu2+. The method shows high selectivity, simplicity in operation, and wide application range.
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, Analytical
Yijing Ai, Lisi Wang, Wanting Fu, Xiang Ye, Juan Zhou, Xiaoping Zhang, Shuhai He, Wei Sun
Summary: In this paper, a graphdiyne (GDY)-modified glassy carbon electrode was prepared and used for the sensitive and simultaneous detection of Zn2+, Cd2+ and Hg2+ heavy metal ions. The GDY-modified electrode provided a larger surface area and more active sites for the absorption of metal ions. By codeposition with Bi3+, the heavy metal ions were pre-concentrated on the GDY-modified electrode surface, resulting in high sensitivity and selectivity during stripping analysis. The detection ranges and limits for Zn2+, Cd2+ and Hg2+ were determined using differential pulse anodic stripping voltammetry.
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
Biotechnology & Applied Microbiology
Ning Liu, Guo Zhao, Wenshuai Ye, Gang Liu
Summary: This study investigates the interference mechanism of humic acid (HA) and fulvic acid (FA) on the detection of Cd2+ and Pb2+ in soil and sediment extracts by square-wave anodic stripping voltammetry (SWASV). It is found that the main interference factor is the complexation of active functional groups in HA and FA, which converts free-state heavy metal ions into undetectable complexes. The interference can be eliminated by UV photolysis.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(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
Food Science & Technology
Mohammad Reza Jalali Sarvestani, Tayyebeh Madrakian, Abbas Afkhami
Summary: A composite of silver nanoparticle-embedded covalent organic framework (Ag@COF) was synthesized and characterized. It was used as an electrocatalytic modifier for sensitive and selective detection of Pb2+ and Cd2+. The optimized electrochemical sensor showed linear response over a wide concentration range and low detection limits for both Pb2+ and Cd2+ ions. It was successfully applied to determine these ions in different edible specimens.
JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION
(2023)