کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7147018 | 1462091 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the potentiometric response of mercury(II) membrane sensors based on symmetrical thiourea derivatives-Experimental and theoretical approaches
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Mercury(II) sensors based on two bis-thioureas: 4,4â²-bis-(3-phenylthiourea)diphenyl methane (L1) and 2-2-[10-[(E)-2-(aminocarbothioyl)hydrazono]-1,4-dihydroxy-9(10H)-anthracenyliden]-1 hydrazinecarbothioamide (L2) were prepared and studied. The best response characteristics were obtained using the composition-L2:KTpClPB:PVC:DOP in the percentage ratio of 3.5:1.5:32:63 (w:w). The electrode exhibited a near Nernstian response of 30.3Â mV decadeâ1 to mercury ions over the activity range 1.0Â ÃÂ 10â7 to 1.0Â ÃÂ 10â2Â M with a limit of detection 7.9Â ÃÂ 10â8Â M. The pH independent plateau ranges between 1.5 and 4.0. The proposed sensor revealed fairly good discriminating ability toward Hg2+ ion in comparison with many hard and soft metal ions. It could be applied to determination of mercury in waste water as a real sample. Besides, theoretical calculations performed using the Gaussian 09 programs indicate a S atom is the most favorite reactive site and mainly responsible for the observed electrochemical behaviors in Hg(II)-selective electrodes toward the different cations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 199, August 2014, Pages 133-141
Journal: Sensors and Actuators B: Chemical - Volume 199, August 2014, Pages 133-141
نویسندگان
M. Ghanei-Motlagh, M. Fayazi, M.A. Taher,