This application note details a quick and effective analytical method for the determi- nation of low ppm and trace level organophosphorus (OP) pesticide residues in an olive oil extract.
This document details an analytical method for determining low ppm and trace level organophosphorus (OP) pesticide residues in olive oil extracts. The method utilizes Gas Chromatography with a Flame Photometric Detector (GC/FPD) in phosphorus mode for quantitation, confirmed by GC/MS. The analysis is performed using an Agilent J&W DB-35ms Ultra Inert (UI) capillary column, which resolves the target pesticides in less than 16 minutes while maintaining excellent peak shape for difficult analytes. A simplified QUEChERS method is used for sample preparation to ensure sufficient cleanup of the high-lipid olive oil matrix.
| Column Dimensions | 30 m x 0.25 mm x 0.25 pm |
|---|---|
| Detection Limits | 10-15 ng/mL |
| Pesticide Recoveries | 63% to 110% |
| Analysis Time | Less than 16 minutes |
| RSD | < 9% |
The method uses an Agilent J&W DB-35ms Ultra Inert (UI) 30 m x 0.25 mm, 0.25 pm column.
The detection limits for most of the pesticides were 10-15 ng/mL.
A simplified QUEChERS method is used to provide sufficient sample matrix cleanup.