A colorimetric smartphone-based platform for pesticides detection using Fe-N/C single-atom nanozyme as oxidase mimetics

Ge Jia; Yang Like; Li ZhaohuiWan YiMao DongshengDeng RuijieZhou QiYang YuTan Weihong

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A colorimetric smartphone-based platform for pesticides detection using Fe-N/C single-atom nanozyme as oxidase mimetics

机译：A colorimetric smartphone-based platform for pesticides detection using Fe-N/C single-atom nanozyme as oxidase mimetics

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摘要

In this study, a novel highly sensitive colorimetric platform has been designed for malathion assay based on FeN/C SAzyme. The as-synthesized SAzyme can directly oxidize 3,3,' 5,5 '-tetramethylbenzidine (TMB) to generate blue colored oxidized TMB. L-ascorbic acid-2-phosphate (AA2P), a substrate of acid phosphatase (ACP), could be hydrolyzed to AA, thereafter inhibit the oxidization reaction of TMB, leading to a conspicuous blue color fading. With the addition of malathion hindered the ACP activity and limited the AA production, resulting in the recovery of the catalytic activity of single-atom nanozyme. Under optimized operational conditions, a novel colorimetric assay has been designed for malathion detection with LOD of 0.42 nM. Besides, quantification of malathion in environmental and food samples was achieved based on the proposed strategy. In addition, the successfully integrated paper/smartphone sensor provided sensitive, and rapid, reliable detection of malathion with a LOD of 1 nM.

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来源
《Journal of Hazardous Materials》 |2022年第1期|1-9|共9页
作者
Ge Jia; Yang Like; Li ZhaohuiWan YiMao DongshengDeng RuijieZhou QiYang YuTan Weihong;
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作者单位

Zhengzhou Univ;

Hainan Univ;

Shanghai Jiao Tong Univ||Shanghai Jiao Tong UnivSichuan Univ||Sichuan UnivAnhui UnivShanghai Jiao Tong Univ||Shanghai Jiao Tong Univ||Univ Chinese Acad Sci;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类
关键词
Fe-N; C SAzyme; Malathion; Acid phosphatase; Colorimetric; Smartphone;

A colorimetric smartphone-based platform for pesticides detection using Fe-N/C single-atom nanozyme as oxidase mimetics

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