Article
Chemistry, Analytical
A. Kumaravel, M. Murugananthan
Summary: A novel nanosilver/dodecane modified electrode was developed for the electrochemical sensing of fenitrothion in environmental samples such as potatoes and paddy, showing lower reduction potential and higher sensing current. The electrode demonstrated excellent stability and constant sensitivity over multiple cycles of analysis, with a lower limit of detection compared to other electrodes. The results obtained using the electrochemical approach were in good agreement with those from the HPLC technique. The modified electrode presents a cost-effective alternative for detecting fenitrothion pesticides.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Biochemistry & Molecular Biology
Parisa Karami-Kolmoti, Hadi Beitollahi, Sina Modiri
Summary: This study utilized manganese dioxide nanorods/graphene oxide nanocomposite (MnO2 NRs/GO) to modify a glassy carbon electrode (GCE), creating a modified electrode (MnO2 NRs/GO/GCE) that serves as an electrochemical sensor for hydroquinone (HQ) detection in water. Various electrochemical analysis techniques confirmed the improved performance of MnO2 NRs/GO/GCE in terms of higher electron transfer rate and conductivity. The linear relationship between HQ concentration and current response in the range of 0.5 μM to 300.0 μM, with a detection limit of 0.012 μM, along with the selective detection of HQ in the presence of interferent molecules, further validated the efficacy of the modified electrode for HQ determination in water samples.
Article
Chemistry, Analytical
Yan Jin, Tong Qi, Yuqing Ge, Jin Chen, Lijuan Liang, Jiaqi Ju, Jianlong Zhao
Summary: An ultrasensitive electrochemical determination of phosphate in water was achieved using hydrophilic TiO2 modified glassy carbon electrodes for the first time, with a detection limit of 0.1 μg L-1 and a linear relationship between phosphate concentration and peak current.
ANALYTICAL METHODS
(2021)
Article
Materials Science, Multidisciplinary
Fatemeh Nosratzehi, Hadi Halakoei, Mojtaba Rostami, Amirmohammad Sorouri, Kourosh Adib, Mehdi Rahimi-Nasrabadi, Hermann Ehrlich
Summary: An electrochemical sensor based on nanomaterials was successfully designed to measure dopamine. The sensor demonstrated high sensitivity and detection limit, and showed good recovery in the measurement of dopamine in serum samples. Additionally, the sensor exhibited good selectivity, repeatability, and reproducibility.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Hamid Akbari Javar, Ahmad Rajabizadeh, Gholamreza Dehghannoudeh, Hadi Mahmoudi-Moghaddam
Summary: This study fabricated Ce (III)-doped CuO nanocomposite via a simple participation technique and applied it as a modifier on the surface of a screen-printed electrode to evaluate the electro-oxidation of sulfamethoxazole (SMX). The developed electrode displayed good electrocatalytic activity, a broad linear range, and a low detection limit.
Article
Electrochemistry
Yao Liu, Lei Wang, Liu Yang
Summary: The study prepared silver-doped titanium dioxide nanoparticles modified glassy carbon electrode for electrochemical detection of tryptophan in food. The electrode showed higher porosity and roughness, providing a larger effective surface area for improved sensitivity and lower detection limit. The nanostructured electrode acted as a mediator in electron transfer, resulting in a comparable linear range, higher sensitivity, and lower detection limit for tryptophan detection compared to reported sensors.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Analytical
Fariba Fazl, Mohammad Bagher Gholivand
Summary: This research utilized a ZrO2-CuO-CeO2 ternary nanocomposite and graphene in constructing a carbon paste sensor for monitoring biomolecules such as dopamine, serotonin, and tryptophan. The sensor showed excellent electron transfer kinetics and electrocatalytic activity, with the lowest detection limit and widest linear range compared to previous reports. The sensor demonstrated good selectivity, stability, reproducibility, and repeatability, making it suitable for routine analysis of dopamine, serotonin, and tryptophan.
Article
Chemistry, Applied
Hadi Mahmoudi-Moghaddam, Hamid Akbari Javar, Zahra Garkani-Nejad
Summary: In this study, a platinum-doped nickel cobaltite nanograss was synthesized and used for the detection of carbendazim. The optimized sensor showed a wide linear range and a low limit of detection for carbendazim, and exhibited good anti-interference ability, selectivity, and stability.
Article
Engineering, Multidisciplinary
Hamid Akbari Javer, Hadi Mahmoudi-Moghaddam, Zahra Garkani-Nejad, Gholamreza Dehghannoudeh
Summary: This paper demonstrates the synthesis of a novel grass-like Pt-doped NiCo2O4 nanocomposite (GL Pt-doped NiCo2O4) and characterizes it using different techniques. The nanocomposite is used for the modification of screen-printed electrodes and shows suitable electrocatalytic behavior for the selective and sensitive detection of amlodipine in the presence of interfering ions and compounds. The differential pulse voltammetry method is used to achieve broad linearity and low detection limits for amlodipine. Moreover, the modified electrode shows acceptable recovery in drug and biological samples.
Article
Chemistry, Multidisciplinary
Bahar Baniahmad, Hadi Hassani Nadiki, Shohreh Jahani, Najmeh Nezamabadi-Pour, Ali Toolabi, Mohammad Mehdi Foroughi
Summary: This study synthesized a La2O3@snowflake-like Cu2S composite and fabricated an electrochemical sensor for the sensitive simultaneous detection of diclofenac and chlorzoxazone. The material was characterized using XRD, FE-SEM, and EDX methods. The results showed that the electrode modified with La2O3@SF-L Cu2S composites exhibited increased electrocatalytic oxidation currents and decreased oxidation potential compared to the pure SF-L Cu2S NS-modified electrode.
FRONTIERS IN CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Fatma Budak, Ahmet Cetinkaya, S. Irem Kaya, Esen Bellur Atici, Sibel A. Ozkan
Summary: In 2012, the FDA approved tofacitinib citrate (TOF) for the treatment of rheumatoid arthritis. Electroanalytical methods using glassy carbon electrode (GCE) and boron-doped diamond electrode (BDDE) were developed to determine TOF. The effects of pH, electrolyte, and scanning rate on TOF's peak current and potentials were investigated. The proposed methods showed excellent recovery results for determining TOF in pharmaceutical dosage forms and serum samples.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Environmental Sciences
Mohammad Reza Hojatpanah, Akbar Khanmohammadi, Hosin Khoshsafar, Ali Hajian, Hasan Bagheri
Summary: In this study, a novel electrochemical sensor modified with ion-imprinted polymers was developed for the determination of uranyl ions. The modified electrode exhibited excellent selectivity and sensitivity, as demonstrated by experimental and characterization analyses. The sensor showed promising potential for practical applications in real samples.
Article
Chemistry, Analytical
Vinitha Mariyappan, Naveen Karuppusamy, Shen-Ming Chen, Paulsamy Raja, Rasu Ramachandran
Summary: A WS2/GdCoO3 nanocomposite was successfully prepared using hydrothermal-assisted synthesis, exhibiting excellent performance for detecting quercetin on an electrode. The material showed good electrochemical response and selectivity.
Article
Chemistry, Analytical
Jiafeng Li, Dongdong Chen, Tao Zhang, Guolong Chen
Summary: In this study, nitrogen-doped hollow nanocarbon spheres were prepared by using dopamine as a carbon and nitrogen source, and were utilized to construct a new electrochemical sensor for methotrexate (MTX). The sensor showed excellent sensitivity, a wide linear range, low detection limit, and good reproducibility, stability, and selectivity for MTX detection.
ANALYTICAL METHODS
(2021)
Article
Engineering, Chemical
S. Nikhil, A. Karthika, P. Suresh, A. Suganthi, M. Rajarajan
Summary: In this study, a catechol (CC) biosensor based on reduced graphene oxide (rGO) decorated beta-cyclodextrin (beta-CD) nanosheet immobilized using nafion (Nf) on modified GCE (glassy carbon electrode) was successfully fabricated. The sensor exhibited excellent electrocatalytic activity, wide linear detection range, high sensitivity, good reproducibility, selectivity, and stability for CC determination.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Gang Qu, Yuxin Zhao, Qiaoli Zhang, Jina Wu, Xiaosen Li, Yang Yang, Shilei Liu
Summary: In this study, magnetic mesoporous materials combined with real-time in situ mass spectrometry were used for the high-throughput detection of hydrolyzed products of organophosphorus nerve agents. The method showed good linearity, low limits of detection and quantification, and high extraction recoveries. The magnetic preparation method used was quick, cost-effective, rugged, and safe. The results demonstrated the potential of this method for rapid and efficient determination of the target analytes in environmental samples.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Anna Hildebrand, Mariam Merchant, Danny O'Hare
Summary: Substandard and falsified artemisinin derivatives in antimalarials have caused significant deaths and economic losses. This study evaluates the feasibility of voltammetric methods for identifying and quantifying artemether. The findings suggest that electrochemical analysis shows promise as a method for artemether identification and quantification.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Marx Osorio Araujo Pereira, Alvaro Ferreira Junior, Edson Silvio Batista Rodrigues, Helena Mulser, Giovanna Nascimento de Mello e Silva, Wallans Torres Pio dos Santos, Eric de Souza Gil
Summary: Brazilian spotted fever (BSF) is a serious and rapidly evolving disease. A new impedimetric immunosensor was developed for rapid diagnosis by measuring specific antibodies in plasma. The sensor demonstrated selectivity and accuracy, and has potential for important applications in diagnostic testing.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Kathrin Schilling, Ronald A. Glabonjat, Olgica Balac, Marta Galvez-Fernandez, Arce Domingo-Relloso, Vesna Slavkovich, Jeff Goldsmith, Miranda R. Jones, Tiffany R. Sanchez, Ana Navas-Acien
Summary: Analysis of trace elements in urine is an important tool for assessing exposures, diagnosing nutritional status, and guiding public health and healthcare intervention. This study provides a sensitive method for analyzing 18 elements in urine samples, using only 100 μL. The results show good accuracy and sensitivity of the method.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Mengya Li, Shijie Liu, Shiliang Guo, Dong Liang, Miaoyun Li, Yaodi Zhu, Lijun Zhao, Jong-Hoon Lee, Gaiming Zhao, Yangyang Ma, Yanxia Liu
Summary: In this study, a magnetic flow device was developed to purify spores in a culture medium system. The device used magnetic nanoparticles to absorb vegetative cells, separating them from the spores. The achieved purity of the collected spores was over 95%. The study also demonstrated a rapid quantitative detection method using Raman spectroscopy.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Wanqiong Liu, Zixuan Wu, Jianwei Peng, Zebin Xu, Yong Liang
Summary: Metal-organic frameworks (MOFs) are effective carriers for molecular imprinting, but their poor dispersibility in aqueous solution is a significant drawback. In this study, we have applied amphiphilic block copolymers and molecularly imprinted technology on MOFs to improve the hydrophilicity of molecularly imprinted fluorescent materials.
ANALYTICAL METHODS
(2024)