Rapid determination of the pesticide ametryn based on a colorimetric aptasensor of gold nanoparticles,Analytical Methods

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Rapid determination of the pesticide ametryn based on a colorimetric aptasensor of gold nanoparticles
Analytical Methods ( IF 2.7 ) Pub Date : 2020-03-17 , DOI: 10.1039/d0ay00283f
Yuan Qu _{1,

2,

3,

4} , Heng Qian _{1,

2,

3,

4} , Yiduo Mi _{1,

2,

3,

4} , Jingjing He _{1,

2,

3,

4} , Haixiang Gao _{1,

2,

3,

4} , Runhua Lu _{1,

2,

3,

4} , Sanbing Zhang _{1,

2,

3,

4} , Wenfeng Zhou _{1,

2,

3,

4}

Affiliation

A new, simple colorimetric aptasensor based on the aggregation-induced color change of citrate-stabilized AuNPs was designed for the specific and sensitive determination of ametryn. Citrate-stabilized AuNPs with negative surface charges were synthesized via an easy one-pot reaction. Because of the electrostatic interaction between the three-nitrogen hybrid ring of ametryn and gold nanoparticles, the citrate-stabilized AuNPs easily undergo aggregation in the presence of ametryn. Thus, with a color change from wine red to gray, ametryn was visually detected by a colorimetric aptasensor. In addition, the detection result can also be measured quantitatively using a UV-vis spectrophotometer. The aptasensor has good selectivity and sensitivity to ametryn in the linear range of 0–80.0 μg L⁻¹. According to the IUPAC criteria (3σ rule), the detection limit of ametryn is 0.15 μg L⁻¹. Moreover, the aptasensor was successfully applied to the detection of ametryn in Yongding River from Zhaocun, Yizhuang Jingkai Sewage Treatment Plant and Yizhuang Nokia Factory water samples. The recovery reached 98.9–101.6%, 95.7–101.3% and 100.0–103.3%, respectively. The excellent performance of the colorimetric aptasensor in the detection of ametryn indicates its potential applications in the detection of ametryn in more complex environmental samples.

中文翻译：

基于金纳米粒子比色适体传感器的农药残留测定

基于聚集诱导的柠檬酸盐稳定的AuNPs的颜色变化，设计了一种新的简单比色适体传感器，用于特异性测定灵敏的a啶。通过简单的一锅反应合成了具有负表面电荷的柠檬酸盐稳定的AuNP 。由于atricn的三氮杂化环与金纳米颗粒之间存在静电相互作用，因此在atricn的存在下，柠檬酸盐稳定的AuNPs易于聚集。因此，随着颜色从酒红色变为灰色，通过比色适体传感器在视觉上检测到ametricn。另外，检测结果也可以使用紫外可见分光光度计定量地测量。适体传感器在0–80.0μgL ^-1的线性范围内具有对选择性测定的良好选择性和灵敏度。根据IUPAC标准（3 σ规则），莠灭净的检测限是0.15微克大号^-1。此外，该适体传感器已成功应用于永定河赵村，亦庄景凯污水处理厂和亦庄诺基亚厂水样中的六氢萘检测。回收率分别达到98.9–101.6％，95.7–101.3％和100.0–103.3％。比色适体传感器在检测atricn中的出色性能表明其在更复杂的环境样品中检测atricn中的潜在应用。

更新日期：2020-04-24

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