کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399881 | 1505909 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Luminol/CdTe quantum dots/sodium periodate system in conjunction with response-surface methodology for chemiluminometric determination of some tetracyclines
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A simple and sensitive chemiluminometric method is described for the determination of tetracycline (TC) and oxytetracycline (OTC) in their hydrochloride form on the basis of drastic enhancement of the chemiluminescence (CL) from the luminol/L-cysteine-capped CdTe quantum dots (QDs)/sodium periodate system, caused by the presence of TC and OTC hydrochloride. The method uses pH value at which tetracyclines have proven to be stable. Response surface methodology was exploited for optimizing the experimental conditions. The synthesized QDs were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis spectroscopy, and photoluminescence spectroscopy. A possible mechanism of the CL system was proposed based on the CL spectra and the effect of some specific radical-scavengers on the system. Under the optimum conditions linear dynamic ranges of 5.0Ã10â8-6.0Ã10â6 mol Lâ1 and 5.0Ã10â8-8.0Ã10â6 mol Lâ1 were observed for TC and OTC, respectively with corresponding detection limits of 2.2Ã10â8 mol Lâ1 and 3.0Ã10â8 mol Lâ1. The precision (RSD%) for five replicate determinations of TC and OTC were respectively no more than 3.4% and 4.0%. The method was satisfactorily applied to the determination of TC.HCl and OTC.HCl in water samples, pharmaceutical formulations, and honey.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 151, July 2014, Pages 57-65
Journal: Journal of Luminescence - Volume 151, July 2014, Pages 57-65
نویسندگان
Amin Imani-Nabiyyi, Mohammad H. Sorouraddin, Mohammad Amjadi, Abdolhossein Naseri,