Investigation of pesticide residue removal effect of gelatinized starch using surface-enhanced Raman scattering mapping

Jie Tang; Qiong Zhang; Jie Zhou; Huichao Fang; Haifeng Yang; Feng Wang

doi:10.1016/j.foodchem.2021.130448

Investigation of pesticide residue removal effect of gelatinized starch using surface-enhanced Raman scattering mapping

Food Chem. 2021 Dec 15:365:130448. doi: 10.1016/j.foodchem.2021.130448. Epub 2021 Jun 24.

Authors

Jie Tang¹, Qiong Zhang¹, Jie Zhou¹, Huichao Fang¹, Haifeng Yang², Feng Wang³

Affiliations

¹ The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors and Department of Chemistry, Shanghai Normal University, Shanghai 200234, PR China.
² The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors and Department of Chemistry, Shanghai Normal University, Shanghai 200234, PR China. Electronic address: haifengyang@yahoo.com.
³ The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors and Department of Chemistry, Shanghai Normal University, Shanghai 200234, PR China. Electronic address: wangfeng@shnu.edu.cn.

PMID: 34218109
DOI: 10.1016/j.foodchem.2021.130448

Abstract

This study investigated the effectiveness of gelatinized starch (GS) in the removal of surface and internalized pesticide residues from basil leaves. Surface activity of GS was confirmed by surface tension and fluorescence study. Surface-enhanced Raman scattering (SERS) mapping was applied for in situ and real-time tracking of pesticides over time. Results showed that gelatinized starch has better and safer pesticide removing effect compared to commercial surfactants. Simulation study showed that starch fragment can adjust its three-dimensional conformation according to the size of the guest with ~ four repeating α-1,4-d-glucopyranose residues interacting efficiently with pesticides. However, washing by small molecular weight surfactants will lead to a "secondary contamination" due to its amphilphilic nature and small molecular size, which can escort pesticide deeper into the leaf. Due to the wide availability, easy fabrication, efficient rinsing effect and bio-safety nature, GS should be highly recommended in family practice.

Keywords: Gelatinized starch; Pesticide residue; SERS; Simulation; Washing.

MeSH terms

Pesticide Residues* / analysis
Pesticides* / analysis
Plant Leaves / chemistry
Spectrum Analysis, Raman
Starch

Substances

Pesticide Residues
Pesticides
Starch