适体
检出限
磺胺二甲氧嘧啶
电化学
纳米孔
咪唑酯
电化学气体传感器
材料科学
沸石咪唑盐骨架
生物传感器
亚甲蓝
电极
化学工程
纳米技术
核化学
化学
吸附
色谱法
无机化学
有机化学
金属有机骨架
光催化
物理化学
生物
遗传学
工程类
催化作用
作者
Zahra Jamalizadeh Bahaabadi,Seyedeh Belin Tavakoly Sany,Fatemeh Gheybi,Aida Gholoobi,Zahra Meshkat,Majid Rezayi,Behnaz Hatamluyi
标识
DOI:10.1016/j.foodchem.2024.138787
摘要
In this study, a straightforward electrochemical aptasensor was developed to detect sulfadimethoxine (SDM). It included a glassy carbon electrode decorated by boron nitride quantum dots (BNQDs) and aptamer-functionalized nanoporous carbon (APT/CZ). CZ was first synthesized by calcinating a zeolitic imidazolate framework (ZIF-8). Then, the electroactive dye methylene blue (MB) was entrapped inside its pores. By attaching aptamer to the CZ surface, APT/CZ acted as a bioguard, which prevented the MB release. Therefore, the electrochemical signal of the entrapped MB was high in the absence of SDM. Introducing SDM caused the conformation of aptamers to change, and a large number of MB was released, which was removed by washing. Therefore, the detection strategy was done based on the change in the electrochemical signal intensity of MB. The aptasensor was applied to detect SDM at a concentration range of 10-17 to 10-7 M with a detection limit of 3.6 × 10-18 M.
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