کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1625087 | 1516425 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemiluminescence characterisation of the reaction system Tb(III)-amino acid-peroxynitrous acid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Chemiluminescence of the reaction system tryptophan-hydrogen peroxide-nitrite-Tb(III)-H2SO4 was used for the determination of tryptophan. The chemiluminescence intensity observed in the system tryptophan-hydrogen peroxide-nitrite-sulfuric acid, in the presence of Tb(III) ions was five times higher than that in a solution without Tb(III) ions. The chemiluminescence spectrum obtained for the system tryptophan-hydrogen peroxide-nitrite-sulfuric acid solution showed one band, with λmax â¼Â 520 nm, whereas in the presence of Tb(III) ions two bands with λmax â¼Â 520 nm and 550 nm were observed. The peak centered at â¼550 nm, corresponding to the 5D4 â 7F5 transition, which is typical for the Tb(III) ion. A linear dependence was found for the CL intensity versus the tryptophan concentration, in the range of 1.2 Ã 10â7 to 1 Ã 10â4 mol/l. Terbium(III) ions play the role of sensitizer in the reaction mixture tryptophan-hydrogen peroxide-nitrite-sulfuric acid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 451, Issues 1â2, 28 February 2008, Pages 186-189
Journal: Journal of Alloys and Compounds - Volume 451, Issues 1â2, 28 February 2008, Pages 186-189
نویسندگان
M. Kaczmarek, S. Lis,