کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10560535 | 969736 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Lead ion-selective electrodes based on polyphenylenediamine as unique solid ionophores
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A novel membrane electrode for Pb(II) ion detection based on semi-conducting poly(m-phenylenediamine) microparticles as a unique solid ionophore was fabricated. The electrode exhibited significantly enhanced response towards Pb(II) over the concentration range from 3.16Â ÃÂ 10â6 to 0.0316Â M at pH 3.0-5.0 with a low detection limit of 6.31Â ÃÂ 10â7Â M, a high sensitivity displaying a near-Nernstian slope of 29.8Â mVÂ decadeâ1 for Pb(II). The electrode showed a long lifetime of 5 months and a short response time of 14Â s. A systematical investigation on the effect of anion excluder and various foreign ions on the selectivity of the electrode by a fixed interference method suggests that all other metal ions hardly ever interfere with the determination of Pb(II) except high concentration Hg(II). The electrode was successfully used as an indicator electrode in the potentiometric titration of Pb(II) with EDTA. Furthermore, the electrode has been used to satisfactorily analyze four types of real-world samples like spiked human urine, spiked tap water, and river water containing interfering ions like Na(I), Ca(II), Mg(II), Zn(II), Pd(II), Fe(III), K(I), Cu(II) and Hg(II) up to 8.04Â ÃÂ 10â4Â M, demonstrating fast response, high selectivity, good recovery (96.6-121.4%), good repeatability (RSD 0.31-6.45%), and small relative error (5.0%).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 85, Issue 3, 15 September 2011, Pages 1575-1584
Journal: Talanta - Volume 85, Issue 3, 15 September 2011, Pages 1575-1584
نویسندگان
Mei-Rong Huang, Xue-Wu Rao, Xin-Gui Li, Yong-Bo Ding,