Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7584852 | Food Chemistry | 2018 | 7 Pages |
Abstract
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 10â¯s to target Cd. Meanwhile, it shows lower noise (0.23â¯mV) and better limit of detection (0.002â¯mgâ¯Lâ1) than LAPS (control) without RGO modification (0.37â¯mV; 0.008â¯mgâ¯Lâ1). 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.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Wen Zhang, Yiwei Xu, Xiaobo Zou,