Targeted Multiresidue Method for the Analysis of Different Classes of Pesticides in Agro-Food Industrial Sludge by Liquid Chromatography Tandem Mass Spectrometry

Sludge generated after washing of fruits and vegetables during agro-food processes is a complex matrix and selective methods for the identification and quantification of pesticides’ residues are necessary in order to achieve a sustainable and effective management of the total sewage. The present wor...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2021-11, Vol.26 (22), p.6888
Main Authors: Maragou, Niki C., Balayiannis, George, Karanasios, Evangelos, Markellou, Emilia, Liapis, Konstantinos
Format: Article
Language:English
Subjects:
agricultural products
Analytical chemistry
Chromatography
environmentally friendly
extraction
Food industry
Food processing
Fruits
fungicides
Imidacloprid
Industrial wastes
Insecticides
Liquid chromatography
Mass spectrometry
Mass spectroscopy
method optimization
Packaging
Pesticide residues
Pesticides
Pore size
Pyrethroids
Sample preparation
Sewage
Sludge
Solvents
Spectroscopy
Waste management
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Summary:Sludge generated after washing of fruits and vegetables during agro-food processes is a complex matrix and selective methods for the identification and quantification of pesticides’ residues are necessary in order to achieve a sustainable and effective management of the total sewage. The present work describes the development and validation of a reliable, simple and fast analytical method based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the determination of 47 pesticides of different chemical classes, including organosphosphates, pyrethroids, neonicotinoids, triazoles and others, in sludge samples after QuEChERS sample preparation. The necessity of the individual steps of QuEChERS was investigated and the LC-ESI-MS/MS conditions were optimized to achieve maximum sensitivity of the target analytes. The method limits of detection (LODs) ranged between 0.0005 mg/kg (imidacloprid) and 0.05 mg/kg (beta cyfluthrin). The recoveries ranged between 71–120% and the repeatability of the method was ≤25% expressed as relative standard deviation. The method was applied to sludge samples generated after washing of fruits in an agro-fruit-packaging unit in Greece. The results showed the presence of 37 pesticides’ active substances with concentrations ranging from low ppbs, such as fludioxinil (5 μg/kg) up to low ppms such as beta cyfluthrin (3.5 mg/kg) and with their sum concentration reaching up to 19 mg/kg.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26226888