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Dadfarnia, S.,Haji Shabani, A.M.,Dehgan Shirie, H. Korean Chemical Society 2002 Bulletin of the Korean Chemical Society Vol.23 No.4
A simple and rapid technique for the separation and preconcentration of lead in water and biological samples has been devised. Preconcentrationis based on the depositionof analyte onto a column packed with dithizone immobilized on sodium dodecyl sulfate coated alumina at pH $\geq$ 3. The trapped lead is eluted with 5 mL of 4 M nitric acid and determined by flame atomic absorption spectroscopy. A sample of 1 L, results in a preconcentration factor of 200 and the precision at 20${\mu}g$ $L^{-1}$ is 1.3%(n=8). The procedure is applied to tap water, well water, river water, vegetable extract and milk samples, and accuracy is assessed through recovery experiments and by independent analysis by furnace atomic absorption.
Indirect Spectrophotometric Determination of Trace Quantities of Hydrazine
Haji Shabani, A.M.,Dadfarnia, S.,Dehghan, K. Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.2
An indirect, sensitive and accurate method for the determination of trace amounts of hydrazine is described. The method is based on the oxidation of hydrazine by a known excess of iodate in the presence of hydrochloric acid. The unreacted iodate is used in the oxidation of hydroxylamine to nitrite. Sulfanilic acid is diazotized by the nitrite formed. The resulting diazonium ion is coupled with N-(1-naphthyl)ethylenediamine to form a stable azo dye, which shows an absorption maximum at 540 nm. Hydrazine can be determined in the range of 20-400 ng $mL^{-1}$ with a detection limit of 3.1 ng $mL^{-1}$. The relative standard deviation for 50, 200 and 400 ng $mL^{-1}$ of hydrazine is 2, 1.5 and 1.3%, respectively (n = 10). The method was applied to the determination of hydrazine in water samples.
M. Shabani-Nooshabadi,M.S. Ghandchi 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.31 No.-
The inhibitive action of Santolina chamaecyparissus extract as a natural inhibitor on corrosion of 304stainless steel in 3.5% NaCl solution was investigated by potentiodynamic polarization, EIS, and SEMtechniques. The results indicate that the extract shows mixed-type inhibition behavior and inhibitionefficiency of 86.9% was achieved with the addition of 1.0 g L 1 extract. Impedance curves show thatincreasing Santolina concentration increases charge transfer resistance and decreases double layercapacitance. The corrosion rate decreased with increasing concentration of extract and increased withthe increase in temperature of the medium. Adsorption of the extract obeyed the Langmuir isothermmodel.
DIFFERENT MORPHOLOGIES OF TiO2 NANOSTRUCTURES IN ACIDIC AND BASIC SOL–GEL METHOD
Mohamad Hasan Imanieh,Y. VAHIDSHAD,P. NOURPOUR,S. SHAKESI,K. SHABANI 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2010 NANO Vol.5 No.5
In this research, nanocrystalline titanium dioxide (TiO2) particles were prepared by a modified alkoxide technique under basic and acidic conditions at room temperatures. A simple method for preparing different morphology of TiO2 has been developed. The reaction condition was used to control the crystalline size, phase and morphology of the TiO2 nanostructures. In this process by adjusting the Rw (water to precursor ratio) and pH value the hydrolysis and condensation reactions were controlled. This led to the development of a new process to produce TiO2 nanorod (for the first time by sol–gel method) at high pH value (basic) while the water content was sufficient whereas at low pH value (acidic) nanosphere TiO2 were obtained. The powders were characterized by DTA, XRD, FE-SEM and UV–vis techniques and their physical properties were compared.
A. Gholami,A.R. Moghadassi,S.M. Hosseini,S. Shabani,F. Gholami 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this research (polyvinyl chloride-blend-cellulose acetate/iron oxide nanoparticles) nanocomposite membranes were prepared by casting technique to lead removal from wastewaters. The effect of blend ratio of polymer binder (PVC to CA) and Fe3O4 nanoparticles concentration on physico-chemical characteristics of membranes were studied. Water permeability and ionic rejection tests, water content and mechanical properties measurements and SEM analysis were carried out in membranes characterizations. Obviously, modified membrane containing 10 wt% CA and 0.1 wt% Fe3O4 nanoparticles showed better performance in lead removal compared to other modified membranes and also pristine ones.
Shakerian, F.,Kim, K.H.,Kwon, E.,Szulejko, J.E.,Kumar, P.,Dadfarnia, S.,Haji Shabani, A.M. Elsevier Scientific Pub. Co 2016 Trends in analytical chemistry Vol.83 No.2
<P>Over the past several decades, much progress has been made in the development of ion-imprinted polymers (IIPs) with the aid of novel types of tailored polymeric materials (e.g., nanomaterials and hybrid materials). Because of such efforts, IIPs are now widely employed as advanced analytical tools in a variety of sectors (e.g., as sorbents for solid phase extraction of metal ions). Recently, due to the advancement of polymeric materials (PMs), an increased number of studies have been made to expand the practical applicability of IIPs. In this review, the basic theories involved in the polymerization methods of IIPs are described along with their synthesis and diverse fields of applications (e.g., solid phase extraction (SPE), sensors, and membrane separators). (C) 2016 Elsevier B.V. All rights reserved.</P>