Related Experiment Video
Updated: Dec 29, 2025
05:20
Avocado Sample Preparation Using the QuEChERS Method with Ammonium Formate for Pesticide Analysis
Published on: December 8, 2023
1.1K
Pesticide extraction from table grapes and plums using ionic liquid based dispersive liquid-liquid microextraction
Lidia M Ravelo-Pérez1, Javier Hernández-Borges, Antonio V Herrera-Herrera
1Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Química, Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez s/n, 38206 La Laguna (Tenerife), Spain.
Analytical and Bioanalytical Chemistry
|September 26, 2009
Summary
This study introduces a new method using room temperature ionic liquids (RTILs) for pesticide analysis in fruits. The technique effectively detects multiple pesticides in table grapes and plums, meeting safety standards.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- Pesticide residue analysis in food is crucial for consumer safety.
- Dispersive liquid-liquid microextraction (DLLME) offers efficient sample preparation.
- Room temperature ionic liquids (RTILs) are emerging as effective extraction solvents.
Purpose of the Study:
- To develop and validate a DLLME method for determining eight multi-class pesticides in table grapes and plums.
- To utilize RTILs as extraction solvents for enhanced pesticide recovery.
- To assess the method's performance against established Maximum Residue Limits (MRLs).
Main Methods:
- Dispersive liquid-liquid microextraction (DLLME) combined with high-performance liquid chromatography-diode array detection (HPLC-DAD).
- Extraction using acetonitrile, followed by reconstitution in a saline aqueous solution.
- Utilized 1-hexyl-3-methylimidazolium hexafluorophosphate ([C(6)MIM][PF(6)]) as the RTIL solvent.
- Matrix-matched calibration to account for sample matrix effects.
Main Results:
- Mean recovery rates ranged from 72-100% for table grapes and 66-105% for plums.
- Limits of detection (LODs) were below European Union MRLs for both fruit types.
- The method demonstrated a strong matrix effect for most analyzed pesticides.
- Successful analysis of 12 commercial fruit samples confirmed the method's applicability.
Conclusions:
- The developed DLLME method using RTILs is sensitive and efficient for pesticide determination in table grapes and plums.
- The method's LODs are well below regulatory limits, ensuring food safety.
- RTILs show significant potential as environmentally friendly extraction solvents in food analysis.
