کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7584852 1492031 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rapid determination of cadmium in rice using an all-solid RGO-enhanced light addressable potentiometric sensor
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Rapid determination of cadmium in rice using an all-solid RGO-enhanced light addressable potentiometric sensor
چکیده انگلیسی
Herein, an all-solid light addressable potentiometric sensor (LAPS) is presented for determination of cadmium (Cd) in rice. On the working surface of the LAPS, reduced graphene oxide (RGO) is introduced as a part of ion-to-electron transducer to improve ionophore behaviors. The composite modification of RGO and ionophore is validated with scanning electron microscopy. The as-fabricated sensor presents a rapid response in less than 10 s to target Cd. Meanwhile, it shows lower noise (0.23 mV) and better limit of detection (0.002 mg L−1) than LAPS (control) without RGO modification (0.37 mV; 0.008 mg L−1). With the proposed method, satisfactory precision, accuracy and selectivity are also established. This method is adopted in an extensive survey for 25 rice samples from 5 regions in China. The results are in very good agreement with those obtained using inductively-coupled plasma-mass spectrometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 261, 30 September 2018, Pages 1-7
نویسندگان
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