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.

引用

页数：11

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