化学
铈
硫代乙酰胆碱
检出限
敌敌畏
催化作用
核化学
纳米颗粒
组合化学
乙酰胆碱酯酶
比色法
无机化学
纳米技术
杀虫剂
酶
色谱法
有机化学
阿切
材料科学
生物
农学
作者
Jianan Wang,Xueyang Wang,Min Wang,Qinghua Bian,Jiangchun Zhong
出处
期刊:Food Chemistry
[Elsevier]
日期:2022-12-01
卷期号:397: 133810-133810
被引量:6
标识
DOI:10.1016/j.foodchem.2022.133810
摘要
Cerium, as a lanthanide, has attracted considerable interest because of its excellent catalytic activity. Here, we propose a novel cerium-based coordination polymer nanoparticles named DPA-Ce-GMP, which have excellent oxidase-mimicking properties. Furthermore, a colorimetric probe that can act as an inhibitor to suppress the activity of acetylcholinesterase (AChE) was developed for detecting organophosphorus pesticides (OPs). DPA-Ce-GMP catalyzes colorless 3,3',5,5'-tetramethylbenzidine (TMB) to produce a blue color, and AChE catalyzes acetylthiocholine to produce thiocholine (TCh), which can weaken DPA-Ce-GMP-catalyzed TMB. After the addition of OPs, the enzymatic activity of AChE was inhibited to produce less amount of TCh, resulting in more DPA-Ce-GMP-catalyst oxidized TMB to show an increasing blue color. Dichlorvos, as the samples, with the limit of 0.024 μg/L. Overall, we believe that the colorimetric probe can be used for the rapid, low-cost, and large-scale field detection of OPs in food samples.
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