کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10410988 | 894535 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel potentiometric sensor for monitoring barium(II) based on 2,3,4-pyridine-1,3,5,7,12-pentaazacyclopentadeca-3-ene
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A poly (vinyl chloride)-based membrane of 2,3,4-pyridine-1,3,5,7,12-pentaazacyclopentadeca-3-ene with sodium tetraphenylborate(NaTPB) as an anion excluder and dioctyl phthalate (DOP) as plasticizer was prepared and investigated as a Ba(II)-selective electrode. The best performance was observed with the membrane having the ligand-PVC-DOP-NaTPB composition 1:4:1:1, which worked well over a wide concentration range (1.41 Ã 10â6-1.0 Ã 10â1 mol Lâ1) with a Nernstian slope of 30.0 mV per decade of activity between pH 2.5 and 7.0. This electrode showed a fast response time of 18 s and was used over a period of 3 months with good reproducibility (S = 0.4 mV). The selectivity coefficient for mono-, di- and trivalent cations indicates excellent selectivity for Ba(II) ions over a large number of cations. Electrode works satisfactorily in methanolic and ethanolic content up to a maximum of 30%. The sensor has been used as an indicator electrode in potentiometric titration of Ba(II) with EDTA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 106, Issue 2, 13 May 2005, Pages 779-783
Journal: Sensors and Actuators B: Chemical - Volume 106, Issue 2, 13 May 2005, Pages 779-783
نویسندگان
Ashok Kumar Singh, Rupam Singh, R.P. Singh, Puja Saxena,