کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1245392 | 969720 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of polymeric triiodide membrane electrode based on clozapine-triiodide ion-pair using experimental design
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optimization of polymeric triiodide membrane electrode based on clozapine-triiodide ion-pair using experimental design Optimization of polymeric triiodide membrane electrode based on clozapine-triiodide ion-pair using experimental design](/preview/png/1245392.png)
چکیده انگلیسی
Central composite design (CCD) and response surface methodology (RSM) were developed as experimental strategies for modeling and optimization of the influence of some variables on the performance of a new PVC membrane triiodide ion-selective electrode. This triiodide sensor is based on triiodide-clozapine ion-pair complexation. PVC, plasticizers, ion-pair amounts and pH were investigated as four variables to build a model to achieve the best Nernstian slope (59.9 mV) as response. The electrode is prepared by incorporating the ion-exchanger in PVC matrix plasticized with 2-nitrophenyl octal ether, which is directly coated on the surface of a graphite electrode. The influence of foreign ions on the electrode performance was also investigated. The optimized membranes demonstrate Nernstian response for triiodide ions over a wide linear range from 5.0 Ã 10â6 to 1.0 Ã 10â2 mol Lâ1 with a limit of detection 2.0 Ã 10â6 mol Lâ1 at 25 °C. The electrodes could be used over a wide pH range 4-8, and have the advantages of easy to prepare, good selectivity and fast response time, long lifetime (over 3 months) and small interferences from hydrogen ion. The proposed electrode was successfully used as indicator electrode in potentiometric titration of triiodide ions and ascorbic acid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 76, Issue 2, 15 July 2008, Pages 320-326
Journal: Talanta - Volume 76, Issue 2, 15 July 2008, Pages 320-326
نویسندگان
Khalil Farhadi, Morteza Bahram, Donya Shokatynia, Floria Salehiyan,