کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10536334 | 962072 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stereoselective histidine sensor based on molecularly imprinted sol-gel films
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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: Stereoselective histidine sensor based on molecularly imprinted sol-gel films Stereoselective histidine sensor based on molecularly imprinted sol-gel films](/preview/png/10536334.png)
چکیده انگلیسی
A piezoelectric sensor coated with a thin molecularly imprinted sol-gel film has been developed for the determination of l-histidine in the liquid phase. Without preprotection, l-histidine was imprinted directly into silica sol-gel films that consisted of a hybrid mixture of functionalized organosilicon precursors (phenyltrimethoxysilane and methyltrimethoxysolane). The viscoelasticity of the film in the air and in buffer solution has been studied by the piezoelectric quartz crystal impedance technique. The binding of l-histidine to the imprinted film in the liquid phase was investigated by the piezoelectric microgravimetry and electrochemical impedance technique. Scatchard analysis showed that the maximum binding site (Qmax) of the l-histidine imprinted sol-gel film is about 23.7 μmol/g. A linear range from 5.0 Ã 10â8 to 1.0 Ã 10â4 M for a detection of l-histidine has been observed with a detection limit of 2.5 Ã 10â8 M for S/N = 3. The proposed imprinted sol-gel sensor exhibits good stability, high specificity, and excellent stereoselectivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytical Biochemistry - Volume 336, Issue 1, 1 January 2005, Pages 108-116
Journal: Analytical Biochemistry - Volume 336, Issue 1, 1 January 2005, Pages 108-116
نویسندگان
Zhaohui Zhang, Haiping Liao, Hui Li, Lihua Nie, Shouzhuo Yao,