کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5009436 1462044 2017 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polyamidoamine dendrimer-armed fluorescent magnetic nanoparticles for sensitive and selective determination of nitrite in beverages
ترجمه فارسی عنوان
نانوذرات مغناطیسی فلورسنت مولکولی پلی آمیدآمین دندریمر برای تعیین حساس و انتخابی نیتریت در نوشیدنی ها
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Herein, we report a novel solid-phase spectrofluorimetric method for the determination of nitrite. The fluorophore 1-naphthylamine-4-sulfonic acid was covalently bonded to the surface of magnetic silica nanoparticles using polyamidoamine dendron structures as spacers. The introduction of dendritic arms significantly improved the fluorescence intensity. Compared with the conventional solid-phase spectrofluorimetry based on physical adsorption of the derived fluorescent reagents to the sorbents, our method exhibited better selectivity and could directly analyze nitrite in real color samples without pretreatment. The concentrations of nitrite in beer, peach juice and grape juice were determined to be 0.146, 0.165 and 0.110 mg/L, respectively, which is in good agreement with capillary electrophoresis results. Moreover, our novel method circumvented the disadvantage of the Langmuir-type isotherm of conventional solid-phase spectrofluorimetry and offered a detection limit of 10 ng/L for a 500-mL fortified sample with a recovery of 90.5%. These promising results suggest that our strategy can be applied for the facile, sensitive and selective detection of nitrite in complicated matrices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 247, August 2017, Pages 774-779
نویسندگان
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