Rapid and non-invasive surface-enhanced Raman spectroscopy (SERS) detection of chlorpyrifos in fruits using disposable paper-based substrates charged with gold nanoparticle/halloysite nanotube composites

Zhang, Xinxi; Chen, Lulu; Fang, Xuejiao; Shang, Yunsheng; Gu, Hongchen; Jia, Wenlin; Yang, Guohai; Gu, Yingqiu; Qu, Lulu

doi:10.1007/s00604-022-05261-1

Cited by 12 publications

(1 citation statement)

References 43 publications

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“…Surface-enhanced Raman spectroscopy (SERS) technology refers to the process after molecules are adsorbed on the surface of some rough metals (such as gold, silver, and copper), where the electromagnetic field on the metal surface or near surface is enhanced in the excitation area, which enhances the Raman signal intensity of adsorbed molecules [ 18 ]. SERS has the advantages of high detection sensitivity, simple sample pretreatment, fast analysis speed, low detection cost, and in situ detection, which has been used for the rapid detection of food additives and pesticide residues in food and agricultural products [ 19 , 20 ]. The SERS enhanced effect was closely related to the substrate material.…”

Section: Introductionmentioning

confidence: 99%

A Simple Aptamer SERS Sensor Based on Mesoporous Silica for the Detection of Chlorpyrifos

Dong

Shi

et al. 2022

Foods

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Chlorpyrifos is an organophosphorus insecticide, which can be used to control a variety of chewing and piercing mouthparts pests in agricultural production. It can destroy the normal nerve impulse conduction by inhibiting the activity of acetylcholinesterase or cholinesterase in the nerves, causing a series of poisoning symptoms. In order to achieve the quantitative analysis of chlorpyrifos residues in agricultural products, an aptamer-controlled signal molecule release method was developed in this study. The signal molecule 4-ATP of surface-enhanced Raman spectroscopy (SERS) was loaded into aminated mesoporous silica nanoparticles (MSNs-NH2) prepared by the one pot method, and then coated with an aptamer of chlorpyrifos through electrostatic interaction. The specific binding of the aptamer and chlorpyrifos led to the release of 4-ATP, and the amount of 4-ATP released was positively correlated with the amount of chlorpyrifos. Finally, the standard curve of chlorpyrifos quantitative detection based on SERS was established. Meanwhile, Ag-carrying mesoporous silica (Ag@MSNs) was prepared as the reinforcement substrate for SERS detection. The results showed that there was a good linear correlation between the Raman intensity and the concentration of chlorpyrifos at 25–250 ng/mL, and the limit of detection (LOD) was 19.87 ng/mL. The recoveries of chlorpyrifos in the apple and tomato samples were 90.08–102.2%, with RSD < 3.32%. This method has high sensitivity, specificity, reproducibility and stability, and can be used for the quantitative detection of chlorpyrifos in the environment and agricultural products.

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Section: Introductionmentioning

confidence: 99%