Article
Chemistry, Analytical
Ma Lucia Abad-Gil, Ma Jesus Gismera, Teresa Sevilla, Jesus R. Procopio
Summary: In this study, the electrochemical behavior of MIT on a gold electrode was investigated and square wave voltammetric methods were developed for its determination at different concentration levels. MIT showed an irreversible and diffusion-controlled oxidation process, with pH-dependent potential and peak current values. By using square-wave voltammetry (SWV) and adsorptive stripping approach (SWAdSV), it is possible to determine MIT in water samples with high sensitivity and low detection limits. Both SWV and SWAdSV methods were successfully applied for the analysis of MIT in different water samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Ning Liu, Guo Zhao, Gang Liu
Summary: This study introduces a new method to detect Cd(II) and Pb(II) using feature stripping currents, which shows better anti-interference capability and detection accuracy. Models established using SVR and the partial least square algorithms demonstrate superior detection performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Gul Sirin Ustabasi, Ismail Yilmaz, Mustafa Ozcan, Ebru Cetinkaya
Summary: Pencil graphite electrode modified with MWCNT and Bi3+ showed improved sensitivity and reduced charge transfer resistance in the simultaneous analysis of Pb2+, Cd2+, and Zn2+. This modification method offers effective electroanalytical performance with low time consumption and cost.
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
Chyh Shyang Ong, Nurul Hanisarina binti Zaharum, Noorhashimah Mohamad Nor, Abdul Latif Ahmad, Qi Hwa Ng, Khairunisak Abdul Razak, Siew Chun Low
Summary: The sensitivity of screen-printed electrochemical sensors strongly depends on the selection of appropriate modifiers that optimize the chemical and physical properties of the sensor surface. This study investigated the impact of chemical and physical factors on the sensitivity of modified sensors for detecting lead and cadmium. The study found that metal-attracting functional groups and surface charge were the dominant factors affecting the sensitivity, while the physical morphology of the sensor surface had a minimal effect. The findings provide valuable insights for designing sensors for heavy metal detection.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
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
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
Tatyana V. Skiba, Nikolay S. Medvedev, Alphya R. Tsygankova, Yuriy V. Panasenko
Summary: In this study, thick film modified graphite sensors were used to simultaneously determine the levels of copper, lead, cadmium, and zinc in mussel tissue from the Sea of Japan. The samples were prepared by wet mineralization and analyzed using anodic stripping voltammetry. The developed method is rapid, inexpensive, reproducible, and has high selectivity and low limits of detection.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Analytical
Manjunatha K. S. Kumara, D. H. Nagaraju, Zhoveta Yhobu, Nayan H. N. Kumar, Srinivasa Budagumpi, Shubhankar Kumar Bose, P. Shivakumar, Venkata Narayana Palakollu
Summary: In this study, researchers functionalized inexpensive and environmentally friendly Fe3O4 nanoparticles with D-valine using a co-precipitation synthetic approach. The resulting Fe3O4-D-Val sensor exhibited ultra-sensitive detection of Cd+2, Pb+2, and Cu+2 in water samples, with detection limits much lower than those suggested by the World Health Organization.
Article
Chemistry, Analytical
Prapaporn Sangkaew, Aroonsri Ngamaroonchote, Kullavadee Karn-Orachai
Summary: A sensitive and selective electrochemical sensor has been developed for simultaneous quantification of Mn(II) and Cr(VI) using a composite of graphene oxide (GO) and manganese oxide modified screen printed carbon electrode (GO-Mn2O3/SPCE). The sensor shows good sensing performance by mixing GO prepared by modified Hummer's method with Mn2O3 of proper particle size. The sensor can be used for water quality monitoring in real samples, based on the formation of Mn-O and Cr-O on the modified electrode with the assistance of oxygen moieties provided by both Mn2O3 NPs and GO.
Article
Materials Science, Multidisciplinary
Shabnam Allahverdiyeva, Pinar Talay Pinar, Yavuz Yardim, Zuhre Senturk
Summary: This study describes the electrochemical investigation and voltammetric determination of the HIV integrase inhibitor dolutegravir for the first time. Results showed that using cathodically pretreated boron-doped diamond electrode, a linear detection of dolutegravir can be achieved under suitable conditions.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Guo Zhao, Thien-Toan Tran, Sidharth Modha, Mohammed Sedki, Nosang V. Myung, David Jassby, Ashok Mulchandani
Summary: This study presents multiplexed anodic stripping voltammetry detection of heavy metal ions using a homemade electrochemical cell with a 3D-printed flow cell. The sensor platform showed high selectivity and accuracy, with a potential applicability in complex matrices, achieving a 95-101% recovery rate in simulated river water.
FRONTIERS IN CHEMISTRY
(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
Engineering, Multidisciplinary
Betuel Bozdogan
Summary: Accurate monitoring of testosterone levels is crucial for diagnosis, treatment, pharmaceutical quality control, and doping detection. In this study, a modified pencil graphite electrode with CuO nanoparticles was used for the determination of testosterone. The sensor exhibited enhanced response and sensitivity, with a linear detection range of 5-200 nM and a detection limit of 4.6 nM.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Hai D. Tran, Uyen P. N. Tran, Dinh Quan Nguyen
Summary: This study presents a method for the detection of Cd2+ and Pb2+ using a MWCNTs paste electrode and a mixture of ionic liquid. The feasibility and accuracy of the electrode were validated through experiments.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
