کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
741820 894268 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Irreversible optical sensor for mercury determination based on tetraarylborate decomposition
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Irreversible optical sensor for mercury determination based on tetraarylborate decomposition
چکیده انگلیسی

A new optical disposable sensor to determine mercury is presented. The procedure uses a polyester sheet with a sensing area composed of plasticized PVC that incorporates a tetraarylborate salt as Hg(II) selective recognition reagent and a porphyrin proton-selective fluoroionophore as the optical transducer. The sensing scheme is based on the decomposition of tetraarylborate anion induced by Hg(II) taken by the membrane which compels the deprotonation of the porphyrin, recovering its fluorescence. The fluorescence increases after 15 min contact with Hg(II) at pH 2.4 which makes it possible to determine Hg(II) up to 25 μg L−1 with an intermembrane reproducibility of 6.5% as R.S.D. The disposable sensor presents good selectivity to Hg(II) over other metal ions. The response mechanism is discussed and the effect of different experimental variables is reported.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 117, Issue 1, 12 September 2006, Pages 135–142
نویسندگان
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