Rapid Determination of Mixed Pesticide Residues on Apple Surfaces by Surface-Enhanced Raman Spectroscopy

Luyao Wang; Pei Ma; Hui Chen; Min Chang; Ping Lu; Ning Chen; Yanbing Yuan; Nan Chen; Xuedian Zhang

doi:10.3390/foods11081089

Rapid Determination of Mixed Pesticide Residues on Apple Surfaces by Surface-Enhanced Raman Spectroscopy

Foods. 2022 Apr 10;11(8):1089. doi: 10.3390/foods11081089.

Authors

Luyao Wang¹, Pei Ma¹, Hui Chen¹, Min Chang¹, Ping Lu¹, Ning Chen¹, Yanbing Yuan¹, Nan Chen², Xuedian Zhang^{1

3}

Affiliations

¹ Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, College of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
² School of Electrical Engineering, Nantong University, Nantong 226019, China.
³ Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China.

Abstract

Chlorpyrifos (CPF) and 2,4-dichlorophenoxyacetic acid (2,4-D) are insecticides and herbicides which has been widely used on farms. However, CPF and 2,4-D residues on corps can bring high risks to human health. Accurate detection of pesticide residues is important for controlling health risks caused by CPF and 2,4-D. Therefore, we developed a fast, sensitive, economical, and lossless surface-enhanced Raman spectroscopy (SERS)-based method for pesticide detection. It can rapidly and simultaneously determine the CPF and 2,4-D mixed pesticide residues on an apple surface at a minimum of 0.001 mg L^-1 concentration, which is far below the pesticide residue standard in China and the EU. The limits of detection reach down to 1.28 × 10^-9 mol L^-1 for CPF and 2.47 × 10^-10 mol L^-1 for 2,4-D. The limits of quantification are 4.27 × 10^-9 mol L^-1 and 8.23 × 10^-10 mol L^-1 for CPF and 2,4-D. This method has a great potential for the accurate detection of pesticide residues, and may be applied to other fields of agricultural products and food industry.

Keywords: 2,4-D; CPF; SERS; apple; nanoparticles; pesticide.