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, 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, 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
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
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
Sandra Enn D. Bahinting, Analiza P. Rollon, Sergi Garcia-Segura, Vince Carlo C. Garcia, Benny Marie B. Ensano, Ralf Ruffel M. Abarca, Jurng-Jae Yee, Mark Daniel G. de Luna
Summary: This study utilized BF-UMEA for the detection of Pb(II) and Cd(II), showing its potential application in trace water quality control.
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
Nanoscience & Nanotechnology
Qiuyu Yang, Xiuli Sun, Yichao Sun, Xiaofang Shen, Yuehong Pang
Summary: An electrochemical sensor, Bi-BDC-NH2@NMCS, was developed by combining an amino-functionalized bismuth metal-organic framework (Bi-BDC-NH2) with nitrogen-doped mesoporous carbon nanosphere (NMCS), enabling simultaneous determination of Pb(II) and Cd(II). The Bi-BDC-NH2@NMCS electrode exhibited improved charge transfer, stability, and conductivity compared to the traditional bismuth film electrode. The method demonstrated excellent stripping performance with low detection limits and a wide linear range, and was successfully applied to the detection of Pb(II) and Cd(II) in liver, fish, and shrimp samples with high recoveries.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Laia L. Fernandez, Julio Bastos-Arrieta, Cristina Palet, Mireia Baeza
Summary: This study describes the implementation of customized graphite electrodes decorated with Hg-NPs for the electrochemical detection of Cd, Pb, and Cu. The results show improved responses towards these analytes compared to bare graphite electrodes. The analytical performance of the sensors was evaluated using square-wave anodic stripping voltammetry and showed good agreement with ICP-MS measurements.
Article
Electrochemistry
Luz E. Rebolledo-Perales, Giaan A. Alvarez Romero, Israel Ibarra, Carlos Andres Galan-Vidal, Juan Francisco Flores-Aguilar, I Perez-Silva
Summary: A highly selective sensor based on carbon paste electrodes (CPE) and ion-imprinted polymers (IIP) was proposed for the analysis of lead (II) in real water samples. By optimizing the analysis parameters, a linear concentration range and low detection limit were achieved. The method allows accurate quantification of lead (II) in complex samples without pre-treatment.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
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
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
Wen-Juan Wang, Xin-Yang Lu, Fen-Ying Kong, Heng-Ye Li, Zhong-Xia Wang, Wei Wang
Summary: In this study, rGO/Au-Bi nanocomposites were successfully synthesized and used for simultaneous electrochemical determination of Pb2+ and Cd2+. The results showed that under optimized conditions, the proposed electrode exhibited good linearity and low detection limits for Pb2+ and Cd2+. The electrode also demonstrated excellent resistance to interference, high stability, and good repeatability.
MICROCHEMICAL JOURNAL
(2022)
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.
