Preparation of Base Membrane of Gold Nanotriangle Filter Paper and Its Application in Rapid Detection of Food Contaminants

1.
College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China;
2.
College of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China;
3.
Department of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China;
4.
The First Affiliated Hospital of University of Science and Technology of China, Hefei 230001, China

Corresponding author: XU Wei-Ping, weipingx@ustc.edu.cn
Received Date: 29 July 2020
Revised Date: 30 September 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 51672004), the Natural Science Foundation of Anhui Province, China (No. 1608085MH176), and the Project of Science and Technology of Auhui Province, China (No.1804h08020252).

Food safety is closely related with human life and health, therefore, it is particularly necessary to establish a fast, sensitive, simple and convenient testing means for food contaminants. Surface-enhanced Raman spectroscopy (SERS) has the characteristics of quickness, convenience and high sensitivity for the field detection and analysis of food contaminants. In this work, the capillary effect of filter paper combined with the quick detection function of SERS technology was used to prepare SERS multi-functional base sensor cards. Firstly, a large area of dense nano membrane was prepared by using the self-assembly method of liquid-liquid interface with the synthesized gold nanotriangle, which was transferred to the surface of filter paper as SERS base membrane. Crystal violet (CV) was used as the Raman probe molecule to investigate SERS sensitivity and repeatability of the substrate membrane, and the plasticizer benzyl butyl phthalate (BBP) in liquor, thiabendazole (TBZ) on the peel surface and antibiotic malachite green (MG) on the fish surface were also detected. The results showed that the concentration of BBP, TBZ and MG could be detected at 1×10^-8 mol/L. This kind of SERS substrate membrane showed a fast detection speed, high sensitivity, convenient operation, and a great potential for SERS analysis.

Preparation of Base Membrane of Gold Nanotriangle Filter Paper and Its Application in Rapid Detection of Food Contaminants

Metrics

通讯作者: 陈斌, bchen63@163.com