کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1228432 1494896 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An optical pH sensor with extended detection range based on fluoresceinamine covalently bound to sol–gel support
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
An optical pH sensor with extended detection range based on fluoresceinamine covalently bound to sol–gel support
چکیده انگلیسی

An optical pH sensor was developed based on the fluorophor, fluoresceinamine isomer II (FA), covalently immobilized in a sol–gel matrix. This sol–gel matrix was created by the copolymerization of two precursors, methyltriethoxysilane (MTES) and 3-glycidoxypropyltrimethoxysilane (GPTMS), in an ethanolic solution. Fluoresceinamine was covalently bound to the glycidoxypropyl chain group of GPTMS, thereby preventing it from leaching. Moreover, the immobilization of the fluoresceinamine also extended its linear detection range. The sensor showed good repeatability, a short response time of less than 8 s, high long-term stability and no temperature effect in the biologically relevant range. In the pH range of 4–10, the sensor was very sensitive and its linear range was found to be between pH 6 and 9 (R2 = 0.995).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 84, Issues 1–2, September 2006, Pages 50–55
نویسندگان
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