Adsorption effect of a cationic surfactant at carbon paste electrode as a sensitive sensor for study and detection of folic acid |
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| Affiliation: | 1. Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O. Box 87317-51167, Islamic Republic of Iran;2. Department of Chemistry, Payame Noor University, Delijan, Iran;3. Department of Chemistry, Payame Noor University (PNU), Tehran, Iran;1. Department of Advanced Materials, WorldTech Scientific Research Center (WT-SRC), Tehran, Iran;2. Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;3. Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran;4. School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran;5. Department of Materials Engineering, Saveh Branch, Islamic Azad University, Saveh, Iran;1. School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China;2. Beijing Martial Delegate Agency, Beijing 100043, China;1. College of Pharmacy & the Key Laboratory for Medical Tissue Engineering of Liaoning Province, Jinzhou Medical University, Jinzhou 121001, China;2. College of Biomedical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University, Jining 272067, China;3. China-Australia Institute for Advanced Materials and Manufacturing (IAMM), Jiaxing University, Jiaxing 314001, China;1. Zhejiang Industry Polytechnic College, Shaoxing 312000, China;2. School of Aeronautics and Astronautics, Zhejiang University, 310027 Hangzhou, China;1. Departamento de Ingeniería de Proyectos, Centro Universitario de Ciencias Exactas e Ingenierías, Blvd. Marcelino García Barragán 1421, Guadalajara Jal., C.P. 44430, México;2. Departamento de Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad Guadalajara, Blvd. Marcelino García Barragán 1421, Guadalajara Jal., C.P. 44430, México;1. Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China;2. Shandong BIOBASE Biological Industry Co., Ltd. Jinan 250101, PR China;3. Petroleum Engineering Technology Research Institute of Shengli Oilfield, Sinopec, Dongying 257000, PR China |
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| Abstract: | The present study is the first report on the effect of cetyltrimethylammonium bromide (CTAB) on the electrochemical behavior of folic acid (FA) at the surface of carbon paste electrode (CPE) in real samples. The studies were performed by cyclic voltammetry (CV), chronocoulometry and differential pulse voltammetry (DPV). CTAB, with a hydrophobic C–H chain, could absorb at the CPE surface by hydrophobic interaction and then changed the electrode/solution interface, and eventually affects the electrochemical response of FA, confirming from the remarkable oxidation peak current enhancement. For investigation of the electrode properties, CV technique was used at the various scan rates. Electrochemical parameters including diffusion coefficient (D), electron transfer coefficient (α) and ionic exchanging current density (jo) were determined for the FA at the surface of the electrode. Under optimized conditions, the proposed method showed acceptable analytical performances for FA in terms of linearity (over the concentration range from 0.01 to 1.5 and 1.5 to 10.0 μM), detection limit (2.89 nM), repeatability (1.37%) and stability (13% reduction in peak current after 60 days). After studying on the effect of probable interferences it was found that the method was free of the interferences. Finally, the proposed method was successfully applied for the determination of FA in real samples. |
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| Keywords: | Adsorption Cetyltrimethylammonium bromide Carbon paste electrode Folic acid Electrochemical studies |
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