Gold Nanoparticle-based Colorimetric Aptasensor for Detection of Malathion

被引：0
|
作者：
Tian H. [1 ]
Wang Y. [1 ,2 ]
Yang H. [2 ]
Li Z. [1 ]
Wu J. [1 ]
Wang L. [1 ]
Liu H. [1 ]
Chang Y. [3 ]
Chen X. [1 ]
机构：
[1] College of Food and Bioengineering, Henan University of Science and Technology, Luoyang
[2] Henan YICE Technology Co. Ltd., Zhengzhou
[3] College of Food and Pharmaceutical Engineering, Guiyang University, Guiyang
来源：
Shipin Kexue/Food Science | 2023年 / 44卷 / 18期
关键词：
aptamer; colorimetric; gold nanoparticles; malathion;
D O I：
10.7506/spkx1002-6630-20220915-142
中图分类号：
学科分类号：
摘要：
In this study, a novel colorimetric sensing method for the detection of malathion was established based on the principle that gold nanoparticles (AuNPs) can aggregate in high-salt solutions, leading to color changes in the solutions. The optimal concentration of NaCl was 500 mmol/L and the optimal concentration of aptamer was 1 μmol/L in the reaction system. This method showed a good linear relationship in the range of malathion concentration of 50–1 500 ng/mL, with a detection limit of 45.54 ng/mL. The recoveries of malathion in spiked lettuce and apple samples were 98.24%–100.91% and 99.48%–101.29%, respectively. The AuNPs-based colorimetric aptasensor could be used for the sensitive, specific, accurate and rapid detection of malathion. Furthermore, this study may provide a reference for developing colorimetric aptasensors for the detection of other pesticide residues. © 2023 Chinese Chamber of Commerce. All rights reserved.
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页码：324 / 330
页数：6
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