کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7147913 | 1462098 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Molecularly imprinted polymers for conductance sensing of Cu2+ in aqueous solutions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Metal ions are the smallest imaginable templates in molecular imprinting. Herein, we report a conductance sensor measuring the real part of impedance at 200 Hz coated with a molecularly imprinted polymer (MIP) for the selective binding Cu2+ from aqueous solutions. For that purpose N-vinyl-2-pyrrolidone - a polymerizable ligand - is pre-assembled with Cu2+ and co-polymerized with ethylene glycol dimethacrylate. The material yields rapid dynamic response toward the presence of analyte within 1 min and a lower limit of detection of 0.02 mmol Lâ1. When using copper chloride for imprinting, highest sensitivity can be reached: sensor effects are almost one order of magnitude higher, than for copper acetate. Furthermore, the sensor exhibits almost four-fold selectivity toward other interfering bivalent ions, such as Ni2+, Zn2+ and Co2+ and nearly seven-fold selectivity toward Na+. The sensors were successfully tested for monitoring copper in spiked real water samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 192, 1 March 2014, Pages 522-528
Journal: Sensors and Actuators B: Chemical - Volume 192, 1 March 2014, Pages 522-528
نویسندگان
Sadia Zafar Bajwa, Ralf Dumler, Peter A. Lieberzeit,