کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7584889 | 1492030 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selective determination of caffeine in foods with 3D-graphene based ultrasound-assisted magnetic solid phase extraction
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An efficient method was applied for extraction of caffeine in food samples. Three-dimensional graphene-Fe3O4 (3D-G-Fe3O4) nanoparticles was successfully synthesized and used as adsorbent in magnetic solid phase extraction (MSPE) step. The properties of synthesized adsorbent were characterized by fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), Raman spectroscopy, Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods. The influence of main parameters of extraction procedure such as ultrasound parameter, amount of nanoparticles, pH, salt concentration and desorption condition were investigated and optimized. Under the optimized experimental conditions, the figure of merit results showed excellent linear dynamic range (LDR) of 0.5-500â¯Âµgâ¯mLâ1, with determination coefficient (R2) higher than 0.996 and limit of detection (LOD) of 0.1â¯Âµgâ¯mLâ1. Intra- and inter-day relative standard deviations (RSDs) were less than 5.9 and 7.1%, respectively. The method was successfully applied for determination of caffeine in different food samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 262, 1 October 2018, Pages 206-214
Journal: Food Chemistry - Volume 262, 1 October 2018, Pages 206-214
نویسندگان
Afshin Rahimi, Mohammad Ali Zanjanchi, Sadjad Bakhtiari, Mohammad Dehsaraei,