Biomimetic enzyme MOF-NADH-mediated and 3,3?,5,5?-tetramethylbenzidine-based colorimetric assay for formaldehyde detection

被引：7
作者：
Li, Mengwen [1 ]
Shen, Ao [1 ]
Hou, Yimin [1 ]
Hao, Xiaohui [1 ]
Du, Man [2 ]
Du, Xiaoyu [1 ]
Ma, Shufeng [1 ]
Yuan, Jiaxin [1 ]
Hou, Lala [1 ]
Zhao, Yongwei [1 ]
Li, Ziqi [1 ]
Yang, Yunxu [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem & Chem Engn, Beijing 100083, Peoples R China
[2] Hebei Univ Sci & Technol, Sch Chem & Pharmaceut Engn, Shijiazhuang 050018, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2022年 / 366卷
基金：
美国国家科学基金会;
关键词：
Formaldehyde; MOF-NADH; Biomimetic enzyme; TMB; Colorimetric detection; METAL-ORGANIC FRAMEWORKS; 2-PHOTON FLUORESCENT-PROBE; SENSITIVE DETECTION; SELECTIVE DETECTION; LIVING CELLS; ENDOGENOUS FORMALDEHYDE; COFACTOR REGENERATION; ASYMMETRIC REDUCTION; IMAGING FORMALDEHYDE; VISIBLE-LIGHT;
D O I：
10.1016/j.snb.2022.132007
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
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 mu M-25 mM), and the detection limit of the MOF-NADH for FA was 4.5 mu M. Specific experiment was also carried out to confirm the selectivity of MOFzymeNADH 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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页数：11
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