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Ashouri N.,Tehran University of Medical Sciences | Ashouri N.,Food and Drug Research Center | Mohammadi A.,Tehran University of Medical Sciences | Shekarchi M.,Water Safety Research Center | And 3 more authors.
Desalination and Water Treatment | Year: 2015

A new nanostructure Cu(II) ion-imprinted polymer (IIP) has been prepared using 1-(2-pyridylazo)-2-naphthol as a ligand. The Cu(II)–PAN complex was synthesized and polymerized in the presence of 2-vinylpyridine (the functional monomer), ethylene glycol dimethacrylate (the cross-linker) and 2,2′-azobisisobutyronitrile (the initiator) via precipitation polymerization using trapping method. The prepared IIP was characterized by FTIR spectroscopy, scanning electron microscopy, and transmission electron microscopy. The optimal pH value for the quantitative preconcentration was 6.0 and maximum sorbent capacity was 11.53 mg g−1. Under the optimized conditions, the method had a linear analytical range from 1 to 50 μg L−1. The detection limit, relative standard deviation, and recovery of the method were evaluated as 0.29 μg L−1, 3.6, and 94–97%, respectively. The developed method was successfully applied to the selective extraction and determination of trace amount of copper ions in water samples and some medicinal plants by inductively coupled plasma-optical emission spectrometry. © 2015 Balaban Desalination Publications. All rights reserved. Source


Ashouri N.,Tehran University of Medical Sciences | Mohammadi A.,Tehran University of Medical Sciences | Hajiaghaee R.,Institute of Medicinal Plants | Shekarchi M.,Water Safety Research Center | Khoshayand M.R.,Tehran University of Medical Sciences
Desalination and Water Treatment | Year: 2015

A new nanoparticle Cd(II) ion-imprinted polymer (IIP) has been prepared via precipitation polymerization using 2-vinylpyridine (the functional monomer), ethylene glycol dimethacrylate (the cross-linker), 2,2′-Azobisisobutyronitrile (the initiator), diphenylcarbazide (the ligand), and cadmium nitrate (the template ion). The prepared IIP was characterized by FT-IR spectroscopy, scanning electron microscopy, and transmission electron microscopy. The optimal pH value for the quantitative sorption was 6.0 and maximum sorbent capacity was 16.52 mg/g. Under the optimized conditions, the method had a linear analytical range from 1 to 50 μg/L. The detection limit, relative standard deviation, and recovery of the method were evaluated as 0.14 μg/L, 2.6% and 96–98%, respectively. The prepared IIP revealed good selectivity over a wide variety of other cations. The developed method was successfully applied for the selective extraction and determination of trace amount of cadmium ions in synthetic and real water samples and some medicinal plants by inductively coupled plasma optical emission spectrometry. © 2015 Balaban Desalination Publications. All rights reserved. Source


Farhadkhani M.,Isfahan University of Medical Sciences | Nikaeen M.,Isfahan University of Medical Sciences | Adergani B.A.,Water Safety Research Center | Hatamzadeh M.,Isfahan University of Medical Sciences | And 2 more authors.
Iranian Journal of Public Health | Year: 2014

Background: Drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. This study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers. Methods: A total of 64 water samples, over a 5-month period in 2012-2013, were collected from free standing bottled water coolers and water taps in Isfahan. Water samples were analyzed for heterotrophic plate count (HPC), tempera-ture, pH, residual chlorine, turbidity, electrical conductivity (EC) and total organic carbon (TOC). Identification of predominant bacteria was also performed by sequence analysis of 16S rDNA. Results: The mean HPC of water coolers was determined at 38864 CFU/ml which exceeded the acceptable level for drinking water in 62% of analyzed samples. The HPC from the water coolers was also found to be significantly (P < 0.05) higher than that of the tap waters. The statistical analysis showed no significant difference between the values of pH, EC, turbidity and TOC in water coolers and tap waters. According to sequence analysis eleven species of bacteria were identified. Conclusion: A high HPC is indicative of microbial water quality deterioration in water coolers. The presence of some opportunistic pathogens in water coolers, furthermore, is a concern from a public health point of view. The results highlight the importance of a periodic disinfection procedure and monitoring system for water coolers in order to keep the level of microbial contamination under control. Source


Sadeghi N.,Tehran University of Medical Sciences | Sadeghi N.,Water Safety Research Center | Oveisi M.R.,Tehran University of Medical Sciences | Jannat B.,Halal Research Center | And 6 more authors.
Iranian Journal of Pharmaceutical Research | Year: 2014

Apart from the breast milk, infant formula and baby weaning food have a special role in infant diet. Infants and young children are very susceptible to amount of trace elements. Copper and zinc are two elements that add in infant food. Lead and cadmium are heavy metals that enter to food chain unavoidably. DPASV is a benefit and applicable method for measurement of trace elements in food products. In this study, concentration of zinc, copper, lead and cadmium in four brands of baby food (rice and wheat based) and powder milk was analyzed with DPASV and polarograph set. Total Mean ± SE of zinc, copper, lead and cadmium in baby foods (n = 240) were 11.86 ± 1.474 mg/100g, 508.197 ± 83.154 μg/100g, 0.445 ± 0.006, 0.050 ± 0.005 mg/Kg respectively. Also these amount in powder milk (n = 240) were 3.621± 0.529 mg/100g, 403.822 ± 133.953 μg/100g, 0.007 ± 0.003, 0.060 ± 0.040 mg/Kg respectively. Zinc level in baby food type I was higher than lablled value (P = 0.030), but in other brands was not difference. Concentration of copper in all of samples was in labeled range (P > 0.05). In each four products, level of lead and cadmium were lower than the standard limit (P < 0.05). Amount of zinc and lead in baby food I, had difference versus other products. Concentration of zinc, camium in baby food type I, was higher than type II (P = 0.043, 0.001 respectively). Concentration of lead and cadmium in baby food type II, was higher than infant formulas, but are in standard limit. © 2014 by School of Pharmacy Shaheed Beheshti University of Medical Sciences and Health Services. Source


Pourfarzib M.,Water Safety Research Center | Pourfarzib M.,Tehran University of Medical Sciences | Dinarvand R.,Tehran University of Medical Sciences | Akbari-Adergani B.,Water Safety Research Center | And 3 more authors.
Journal of Separation Science | Year: 2015

A molecularly imprinted polymer has been synthesized to specifically extract adefovir, an antiviral drug, from serum and urine by dispersive solid-phase extraction before high-performance liquid chromatography with UV analysis. The imprinted polymers were prepared by bulk polymerization by a noncovalent imprinting method that involved the use of adefovir (template molecule) and functional monomer (methacrylic acid) complex prior to polymerization, ethylene glycol dimethacrylate as cross-linker, and chloroform as porogen. Molecular recognition properties, binding capacity, and selectivity of the molecularly imprinted polymers were evaluated and the results show that the obtained polymers have high specific retention and enrichment for adefovir in aqueous medium. The new imprinted polymer was utilized as a molecular sorbent for the separation of adefovir from human serum and urine. The serum and urine extraction of adefovir by the molecularly imprinted polymer followed by high-performance liquid chromatography showed a linear calibration curve in the range of 20-100 μg/L with excellent precisions (2.5 and 2.8% for 50 μg/L), respectively. The limit of detection and limit of quantization were determined in serum (7.62 and 15.1 μg/L), and urine (5.45 and 16 μg/L). The recoveries for serum and urine samples were found to be 88.2-93.5 and 84.3-90.2%, respectively. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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