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Beyki M.H.,University of Tehran | Alijani H.,Amirkabir University of Technology | Ghasemi M.H.,Applied Chemistry Research Group
Desalination and Water Treatment | Year: 2015

Herein, onestep prepared magnetic multi-walled carbon nanotubes were anchored with melamine and applied as a magnetic recyclable dye sorbent. Direct blue 71 was used as a sample anionic dye and the results showed that the sorbent has good efficiency for uptake of it. Equilibrium time was 30 min and maximum adsorption capacity of 250 mg/g was obtained. Prepared material was regenerated using ethanol–NaOH solution. The study of kinetic and isotherm models showed that adsorption process followed second-order and Langmuir models, respectively. © 2015 Balaban Desalination Publications. All rights reserved. Source


Ganjali M.R.,University of Tehran | Ganjali M.R.,Tehran University of Medical Sciences | Aghili S.,University of Tehran | Larijani B.,Tehran University of Medical Sciences | Ghasemi M.H.,Applied Chemistry Research Group
International Journal of Electrochemical Science | Year: 2015

Betahistine is histamine like drug that acts as both a partial histamine H1 receptor agonist and as a histamine H3 receptor antagonist. This research introduces design and construction of a PVC membrane sensor and nano-composite carbon paste electrode for fast and simple determination of Betahistine in pharmaceutical formulation. The best electrode performance was obtained with a membrane composition of 30% PVC, 63% NPOE, and 7% ion-pair and paste composition of 53% graphite, 30% paraffin oil, 15% ion-pair and 2% MWCNT. This electrode illustrated fast, stable and Nernstian response over a relatively wide concentration range of 1×10-5 to 1×10-2 mol L-1 for PVC membrane sensor and 1.0×10-6 to 5.0×10-1 mol L-1 for nano-composite carbon paste electrode. Validation of the method shows suitability of the sensors for application in quality control analysis of drug in pharmaceutical formulation. © 2015 The Authors. Source

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