توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Synthesis of surface molecular imprinted polymer to the magnetic solid phase extraction of choramphenicol from
اطلاعات انتشار: دومین کنفرانس بین المللی یافته های نوین پژوهشی در شیمی و مهندسی شیمی، سال
تعداد صفحات: ۴
The purpose of this research is to prepare a molecularly imprinted polymer (MIP) using iron oxide (Fe3O4). Firstly Fe3O4 was and then SiO2 was coated on Fe3O4 using sol– gel technique. Prior to polymerization the vinyl group was introduced on to the surface of SiO2\Fe3O4 through chemical modification with γ – methacryloxypropyl trimethoxysilence (γ –MAPS), which can direct selective polymerization on the surface. Then a novel composite of MIP–SiO2\Fe3O4 was obtained by copolymerization in presence of vinyl group functionalized SiO2\Fe3O4, Chloramphenicol, methacrylic acid and ethylene glycol dimethacrylate. The MIP–SiO2\Fe3O4 composite was characterized by FT–IR, SEM methods. Following this product was used for analytical sample preparation based on magnetic solid phase extraction (SPE) using molecularly imprinted polymer as new synthesized sorbet for isolation and extraction of Chloramphenicol followed by HPLC–UV from honey sample. The method showed good linearity in the range of 40–500 μg\L. Furthermore, satisfactory relative recovery was obtained for honey sample<\div>

۲Rapid monitoring of copper by High–Sensitive Potentiometric Membrane Electrode based on 2–(2–4–Methoxybenzoyl)imino)–4–(4–methoxyphenyl)thiazol–3(2H)–yl)–2–phenylacetic acid
اطلاعات انتشار: دومین کنفرانس بین المللی یافته های نوین پژوهشی در شیمی و مهندسی شیمی، سال
تعداد صفحات: ۱۰
The potentiometric properties of copper ion–selective electrodes (ISEs) with liquid contact based on polymeric membrane were investigated. In this paper, 2–(2–((4–Methoxybenzoyl)imino)–4–(4–methoxyphenyl)thiazol–3(2H)–yl)–2–phenylacetic acid was synthesized and used as an ionophore for preparation of selective and sensitive ion selective liquid membrane electrode for potentiometric monitoring of trace amounts of Cu2+. This electrode exhibits a Nernstian response for Cu2+ ions over a concentration range (1.0×10–1 to 5.0×10–6 molL–1) with a slope of 30.65±0.4 mV per decade. The limit of detection of the sensor is 7.0×10–7 molL–1. The sensor has a relatively fast response time (<19 s) and a useful working pH range of 5.0–8.0. Interference of some cations was also evaluated.<\div>

۳Mercury Recognition: A Potentiometric Membrane Sensor based on 4–(Benzylidene amino)–3,4–dihydro–6–methyl–3–thioxo–1,2,4–triazin–5(2H)one
اطلاعات انتشار: Analytical & Bioanalytical Electrochemistry، پنجم،شماره۴، Aug ۲۰۱۳، سال
تعداد صفحات: ۱۳
In this study, a Hg2+ potentiometric membrane sensor was prepared based on the highly selective complexation between 4–(benzylidene amino)–3,4–dihydro–6–methyl–3– thioxo–1,2,4–triazin–5(2H)one as ionophore and Hg2+ ion. The electrode exhibits a Nernstian response for Hg2+ over a concentration range (1.0×10–2 to 1.0×10–6 M) with a slope of29.06±0.4 mV per decade. The limit of detection of the sensor is 6.0×10–7 M. The sensor has a relatively fast response time (~10 s) and a useful working pH range of 3.5–6.5. Interference of some cations was also evaluated. It was used as an indicator electrode in potentiometric titration of Hg2+ ion with EDTA and in direct determination of Hg2+ in water and wastewater samples. The results indicate that this electrode is sensitive for determination of Hg2+ ion.

۴Construction of Chromium Potentiometric Sensor by using N–banzoyl–N′(6–methyl–2–pyridyl) thiourea as an Excellent Ionophore
اطلاعات انتشار: Analytical & Bioanalytical Electrochemistry، ششم،شماره۵، Oct ۲۰۱۴، سال
تعداد صفحات: ۱۲
Ion potentiometric sensors are playing an important role in environmental analysis because of their simplicity and rapidity. In this study, a potentiometric liquid membrane sensor for simple and fast quantification of chromium in various samples was made. Nbanzoyl– N′(6–methyl–2–pyridyl) thiourea was selected as a sensing material in the organic phase of the PVC membrane. The wide linear range (10–6–10–1 mol L–1), low detection limit (3.0×10–7 mol L–1), and fast response time (~5 s) are the characterizations of this electrochemical sensor. The effects of some factors such as internal solution, pH, life time and selectivity were investigated. Finally, it was used for direct determination of chromium and as an indicator electrode in potentiometric titration of chromium ion.
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