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RISS 인기검색어
- 검색키워드
- 저자 : Hamid Hashemi-Moghaddam (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
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Hashemi-Moghaddam, Hamid,Rahimian, Majid,Niromand, Bahman Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.8
A highly selective molecularly imprinted polymer (MIP) for sarcosine, a cancer marker, was prepared and its use as solid-phase extraction (SPE) sorbent material was demonstrated. The MIP was prepared by a very simple procedure using methacrylic acid as functional monomer and a mixture acetonitrile/water (4/1, v/v) as porogen, overcoming in this way the problems usually related to the imprinting of biological polar compounds. The MIP was tested in batch experiments in order to evaluate its binding properties and then used as SPE sorbent for the selective clean-up and pre-concentration of sarcosine. The extraction protocol was successfully applied to the direct extraction of sarcosine from spiked human urine indicating that the MIP allowed sarcosine to be pre-concentrated while simultaneously interfering compounds were removed from the matrix.
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Hamid Hashemi-Moghaddam,Majid Rahimia,Bahman Niromand 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.8
A highly selective molecularly imprinted polymer (MIP) for sarcosine, a cancer marker, was prepared and its use as solid-phase extraction (SPE) sorbent material was demonstrated. The MIP was prepared by a very simple procedure using methacrylic acid as functional monomer and a mixture acetonitrile/water (4/1, v/v) as porogen, overcoming in this way the problems usually related to the imprinting of biological polar compounds. The MIP was tested in batch experiments in order to evaluate its binding properties and then used as SPE sorbent for the selective clean-up and pre-concentration of sarcosine. The extraction protocol was successfully applied to the direct extraction of sarcosine from spiked human urine indicating that the MIP allowed sarcosine to be preconcentrated while simultaneously interfering compounds were removed from the matrix.
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Hamid Hashemi-Moghaddam,Mohammad Shakeri 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.10
The present study describes the synthesis and preliminary testing of molecularly imprinted polymers (MIPs)as scavenger resins for removal of the genotoxic impurity (GTI) (2RS)-2-[[2-[[[(1E)-5-methoxy-1-[4(trifluoromethyl)phenyl] pentylidene] amino] oxy] ethyl] amino] butanedioic acid from active pharmaceutical ingredients (API). Tocompare the performance of this polymer, a control polymer or non-imprinted polymer (NIP) was prepared under thesame conditions without the use of template molecule. The synthesized polymers were characterized by FT-IR spectros-copy. The results of the selectivity of the molecularly imprinted polymer for absorption GTI impurity through adsorp-tion experiments reviews were compared with the adsorption of impurity by NIP. Various parameters were optimized,such as time, pH, type of eluent for elution of impurity from polymer, concentration of sample and saturation of polymer. The proposed method was applied for removal of this genotoxic impurity from Fluvoxamine maleate tablet.
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Hosseini, Mohammad Saeid,Hashemi-Moghaddam, Hamid Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.10
A simple and cost effective method for separation and preconcentration of Ag(I) at the $10^{-7}\;mol\;L^{-1}$ level in the environmental and mineral samples is present. The method is based on the flotation of Ag(I)-iodide complex as an ion-associate with ferroin in pH of 4 from a large volume of an aqueous solution (500 mL) using nheptane. The floated layer was then dissolved in dimethylsulfoxide (DMSO) for the subsequent spectrophotometric determination. Beer's law was obeyed over a range of 2.0 ${\times}$ $10^{-7}$-4.0 ${\times}$ $10^{-6}$ mol $L^{-1}$ with the apparent molar absorptivity of 2.67 ${\times}$ $10^5$ L $mol^{-1}\;cm^{-1}$. The detection limit (n = 5) was 4 ${\times}$ $10^{-8}$ mol $L^{-1}$, and RSD (n = 5) obtained for 2.0 ${\times}$ $10^{-6}$ mol $L^{-1}$ of Ag(I) was 2.2%. The interference effects of a number of elements was studied and found that only $Hg^{2+}$ at low concentration, and $Pb^{2+}$, $Cd^{2+}$, $Cu^{2+}$, and $Fe^{3+}$ ions at moderately high concentrations were interfered. To overcome on these interference effects, the solution was treated with EDTA at a buffering pH of 4 and passed through a column containing Amberlite IR-120 ionexchanger resin, just before the flotation process. The proposed method was applied to determine of Ag(I) in a synthetic waste water, a photographic washing sample and a geological sample and the results was compared with those obtained from the flame atomic absorption spectrometry. The results were satisfactorily comparable with together, so that the applicability of the proposed method was confirmed in encountering with the real samples.
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Mohammad Saeid Hosseini,Hamid Hashemi-Moghaddam 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.10
A simple and cost effective method for separation and preconcentration of Ag(I) at the 107 mol L1 level in the environmental and mineral samples is present. The method is based on the flotation of Ag(I)-iodide complex as an ion-associate with ferroin in pH of 4 from a large volume of an aqueous solution (500 mL) using n-heptane. The floated layer was then dissolved in dimethylsulfoxide (DMSO) for the subsequent spectrophotometric determination. Beer's law was obeyed over a range of 2.0 × 107-4.0 × 106 mol L1 with the apparent molar absorptivity of 2.67 × 105 L mol1 cm1. The detection limit (n = 5) was 4 × 108 mol L1, and RSD (n = 5) obtained for 2.0 × 106 mol L1 of Ag(I) was 2.2%. The interference effects of a number of elements was studied and found that only Hg2+ at low concentration, and Pb2+, Cd2+, Cu2+, and Fe3+ ions at moderately high concentrations were interfered. To overcome on these interference effects, the solution was treated with EDTA at a buffering pH of 4 and passed through a column containing Amberlite IR-120 ion-exchanger resin, just before the flotation process. The proposed method was applied to determine of Ag(I) in a synthetic waste water, a photographic washing sample and a geological sample and the results was compared with those obtained from the flame atomic absorption spectrometry. The results were satisfactorily comparable with together, so that the applicability of the proposed method was confirmed in encountering with the real samples.
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