کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1171378 | 960716 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic method as a simple approach for wide range pH measurements using optodes
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dynamic method as a simple approach for wide range pH measurements using optodes Dynamic method as a simple approach for wide range pH measurements using optodes](/preview/png/1171378.png)
چکیده انگلیسی
In this paper, a flow system equipped with an optode has been suggested for wide range pH measurements. Triacetyl cellulose was used as the optode membrane in which different pH indicators were immobilized. For extending the pH range, the dynamic response rather than the steady-state response of the optode was measured. Since diffusion is the main process governing the system response, different parameters having influence on diffusion of the analyte into the membrane were optimized. Under the optimum conditions, wide range pH determination (up to 11 pH units) is simply achieved regardless of the pKa of the pH indicator immobilized in the membrane. To validate the application of the method different indicators with different structures and pKa values were tested and the results were all confirming the precision and accuracy of the method. The suggested method also has combined advantages of flow systems together with inherent advantages of kinetic systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 583, Issue 2, 5 February 2007, Pages 326-331
Journal: Analytica Chimica Acta - Volume 583, Issue 2, 5 February 2007, Pages 326-331
نویسندگان
A. Safavi, A.R. Banazadeh,