کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10559783 | 969670 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanism study on inorganic oxidants induced inhibition of Ru(bpy)32+ electrochemiluminescence and its application for sensitive determination of some inorganic oxidants
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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
Inhibited Ru(bpy)32+ electrochemiluminescence by inorganic oxidants is investigated. Results showed that a number of inorganic oxidants can quench the ECL of Ru(bpy)32+/tri-n-propylamine (TPrA) system, and the logarithm of the decrease in ECL intensity (ÎI) was proportional to the logarithm of analyte concentrations. Based on which, a sensitive approach for detection of these inorganic oxidants was established, e.g. the log-log plots of ÎI versus the concentration of MnO4â, Cr2O72â and Fe(CN)63â are linear in the range of 1 Ã 10â7 to 3 Ã 10â4 M for MnO4â and Cr2O72â, and 1 Ã 10â7 to 1 Ã 10â4 M for Fe(CN)63â, with the limit of detection (LOD) of 8.0 Ã 10â8 M, 2 Ã 10â8 M, and 1 Ã 10â8 M, respectively. A series of experiments such as a comparison of the inhibitory effect of different compounds on Ru(bpy)32+/TPrA ECL, ECL emission spectra, UV-Vis absorption spectra etc. were investigated in order to discover how these inorganic analytes quench the ECL of Ru(bpy)32+/TPrA system. A mechanism based on consumption of TPrA intermediate (TPrA·) by inorganic oxidants was proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 85, Issue 1, 15 July 2011, Pages 339-344
Journal: Talanta - Volume 85, Issue 1, 15 July 2011, Pages 339-344
نویسندگان
Bin Qiu, Lingling Xue, Yanping Wu, Zhenyu Lin, Longhua Guo, Guonan Chen,