Solid-phase extraction cleanup of tomato samples for the determination of pesticide residues by gas chromatography-electron capture detection

2006 ◽  
Vol 86 (1-2) ◽  
pp. 69-76 ◽  
Author(s):  
Polyxeni P. Georgiou ◽  
Konstantinos S. Liapis ◽  
George E. Miliadis ◽  
Panayotis A. Siskos
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Extraction ◽  
Electron Capture ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Electron Capture Detection ◽  
Phase Extraction

scholarly journals Determination of Organochlorine, Organophosphorus, and Triazine Pesticide Residues in Wine by Gas Chromatography with Electron Capture and Nitrogen–Phosphorus Detection

1996 ◽  
Vol 79 (6) ◽  
pp. 1423-1427 ◽  
Author(s):  
Rosario Garcia-Repetto ◽  
Isabel Garrtoo ◽  
Manuel Repetto
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Electron Capture Detection ◽  
Gel Chromatography ◽  
Phase Extraction ◽  
Silica Gel Chromatography ◽  
Nitrogen Phosphorus

Abstract A multiresidue analytical method is described for determining 6 pesticides in wine: chlorpyrifos, dimethoate, quinalphos, simazine, tetradifon, and endosulfan. Wine (200 mL) is extracted with dichloromethane (50 mL, 3 times), and the evaporated extracts are purified by silica gel chromatography. Pesticide residues are eluted with n-hexane, n-hexane-benzene (1 + 1), benzene, benzene–acetone (1 + 1), and acetone. Residues are determined by gas chromatography with nitrogen–phosphorus and electron capture detection, using CPSH-5CB, Carbo wax-20M, and CPSH-19CB columns. Recoveries of pesticides added at 0.025 μg/L were 83–97%, with standard deviations of 0.01–0.05%. Detection limits were 0.13–8.9 ng/L, except for simazine (36.7 μg/L). Results are compared with those obtained with a solid-phase extraction (C18) purification and with different eluant series.

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