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Atta NF, Galal A, El-Gohary AR. Novel designed electrochemical sensor for simultaneous determination of linezolid and meropenem pneumonia drugs. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115814] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tang X, Wu J, Wu W, Zhang Z, Zhang W, Zhang Q, Zhang W, Chen X, Li P. Competitive-Type Pressure-Dependent Immunosensor for Highly Sensitive Detection of Diacetoxyscirpenol in Wheat via Monoclonal Antibody. Anal Chem 2020; 92:3563-3571. [PMID: 31899867 DOI: 10.1021/acs.analchem.9b03933] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Diacetoxyscirpenol (DAS) is a type A trichothecene mycotoxin with low molecular weight, and with respect to its toxicity and the occurrence in food and feed, it is known as a potential risk for public and animal health. In the present study, first, a sensitive and specific monoclonal antibody (5E7) was developed. Then, the antibody was applied to develop a competitive-type pressure-dependent immunosensor (CTPDI). The Au@PtNP was synthesized and labeled with goat antimouse antibody (Au@PtNPs-IgG). Finally, the concentration of DAS was negatively correlated with the pressure signal. In the presence of optimal conditions, matrix-matched calibration curves were plotted for wheat samples, in which an optimal IC50 value (half maximal inhibitory concentration) of 3.08 ng/g was achieved. The CTPDI was further applied to detect natural and blind wheat samples, and validation was carried out by liquid chromatography-tandem mass spectrometry. The results showed that CTPDI was highly appropriate and accurate for detection of DAS in wheat.
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Affiliation(s)
- Xiaoqian Tang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China
| | - Jing Wu
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China
| | - Wenqin Wu
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China
| | - Zhaowei Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China
| | - Weiqi Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China
| | - Qi Zhang
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, P. R. China
| | - Wen Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, P. R. China.,Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, P. R. China
| | - Xiaomei Chen
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China
| | - Peiwu Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, P. R. China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, P. R. China.,Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, P. R. China.,Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, P. R. China.,Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, P. R. China
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Galal A, Hassan HK, Atta NF, Abdel-Mageed AM, Jacob T. Synthesis, structural and morphological characterizations of nano-Ru-based perovskites/RGO composites. Sci Rep 2019; 9:7948. [PMID: 31138882 PMCID: PMC6538664 DOI: 10.1038/s41598-019-43726-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 04/23/2019] [Indexed: 11/25/2022] Open
Abstract
Highly-dispersed Ru-based perovskites supported on reduced graphene oxide (A-RG) nanocomposites are prepared using different A-metal salts (Sr(NO3)2, Ba(NO3)2 and Ca(NO3)2). The procedure is based on a redox reaction between the metal precursors and graphene oxide (GO) using two different routes of reaction initiation: through thermal heating or by microwave-assisted heating. The resulting nanocomposites do not require further calcination, making this method less energy-demanding. In addition, no additional chemical reagents are required for either the GO reduction or the metal precursor oxidation, leading to an overall simple and direct synthesis method. The structure and morphology of the as-prepared A-RG (non-calcined) nanocomposites are characterized using various structural analyses including XRD, XPS, SEM/EDX and HR-TEM. Changing metal A in the perovskite as well as the “activation method” resulted in significant structural and morphological changes of the formed composites. SrRuO3 and BaRuO3 in combination with RuO2 are obtained using a conventional combustion method, while SrRuO3 (~1 nm size) in combination with Ru nanoparticles are successfully prepared using microwave irradiation. For the first time, a microwave-assisted synthesis method (without calcination) was used to form crystalline nano-CaRuO3.
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Affiliation(s)
- Ahmed Galal
- Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt.
| | - Hagar K Hassan
- Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt
| | - Nada F Atta
- Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt
| | - Ali M Abdel-Mageed
- Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt.,Institute of Surface Chemistry and Catalysis, Ulm University, 89069, Ulm, Germany
| | - Timo Jacob
- Institute of Electrochemistry, Ulm University, 89081, Ulm, Germany.,Helmholtz-Institute-Ulm (HIU), Helmholtzstr. 11, 89081, Ulm, Germany.,Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021, Karlsruhe, Germany
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Galal A, Hassan HK, Atta NF, Jacob T. An Efficient and Durable Electrocatalyst for Hydrogen Production Based on Earth-Abundant Oxide-Graphene Composite. ChemistrySelect 2017. [DOI: 10.1002/slct.201701408] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ahmed Galal
- Department of Chemistry, Faculty of Science; Cairo University; 1 Gamaa Al Kahira Street 12613 Giza Egypt
| | - Hagar K. Hassan
- Department of Chemistry, Faculty of Science; Cairo University; 1 Gamaa Al Kahira Street 12613 Giza Egypt
| | - Nada F. Atta
- Department of Chemistry, Faculty of Science; Cairo University; 1 Gamaa Al Kahira Street 12613 Giza Egypt
| | - Timo Jacob
- Institute of Electrochemistry; Ulm University; 89081 Ulm Germany
- Helmholtz-Institute-Ulm (HIU); Helmholtzstr. 11 89081 Ulm Germany
- Karlsruhe Institute of Technology (KIT); P.O. Box 3640 76021 Karlsruhe Germany
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Atta NF, Hassan HK, Galal A. Rapid and simple electrochemical detection of morphine on graphene–palladium-hybrid-modified glassy carbon electrode. Anal Bioanal Chem 2014; 406:6933-42. [DOI: 10.1007/s00216-014-7999-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 06/02/2014] [Accepted: 06/25/2014] [Indexed: 10/25/2022]
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