检出限
选择性
化学
RGB颜色模型
比色法
线性范围
甲醛
色谱法
催化作用
计算机科学
有机化学
操作系统
作者
Mengwen Li,Ao Shen,Yimin Hou,Xiaohui Hao,Miao Du,Xiaoyu Du,Shuang Ma,Jiaxin Yuan,Lala Hou,Yongwei Zhao,Ziqi Li,Yunxu Yang
标识
DOI:10.1016/j.snb.2022.132007
摘要
This work reported a new MOF-NADH-mediated colorimetric assay for highly sensitive detection of FA based on the biomimetic enzyme reductive reaction and the co-catalysis of metalloporphyrin with oxidized 3,3′,5,5′-tetramethylbenzidine (oxTMB) as the color indicator in the sensing process. An excellent linear relationship (R2 = 0.9958) was obtained by a broad signal fitting dynamic range of FA (1 μM-25 mM), and the detection limit of the MOF-NADH for FA was 4.5 μM. Specific experiment was also carried out to confirm the selectivity of MOFzyme-NADH system to FA. To realize smart sensing of FA, a test paper strip-based sensor with a portable smartphone sensing platform had been developed to process the RGB values by a color-read APP. Furthermore, the paper strip-based sensor with the smartphone platform had been employed for the practical detection of FA in real samples from environment and food, and series of good results were obtained.
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