Multiresidue determination of pyrethroid pesticide residues in pepper through a modified QuEChERS method and gas chromatography with electron capture detection

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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Determination of pesticide residues in wine using gas chromatography with nitrogen-phosphorus and electron capture detection

Food Additives & Contaminants ◽

10.1080/0265203031000109459 ◽

2003 ◽

Vol 20 (8) ◽

pp. 699-706 ◽

Cited By ~ 9

Author(s):

E. J. Avramides ◽

Ch. Lentza-Rizos ◽

M. Mojasevic

Keyword(s):

Gas Chromatography ◽

Electron Capture ◽

Pesticide Residues ◽

Electron Capture Detection ◽

Nitrogen Phosphorus

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Determination of Pesticide Residues in Rice Grain by Solvent Extraction, Column Cleanup, and Gas Chromatography-Electron Capture Detection

Bulletin of Environmental Contamination and Toxicology ◽

10.1007/s00128-010-0178-7 ◽

2010 ◽

Vol 86 (1) ◽

pp. 83-89 ◽

Cited By ~ 9

Author(s):

Riaz Uddin ◽

Sajid Iqbal ◽

Muhammad Farhanullah Khan ◽

Zahida Parveen ◽

Mubarik Ahmed ◽

...

Keyword(s):

Gas Chromatography ◽

Solvent Extraction ◽

Electron Capture ◽

Pesticide Residues ◽

Electron Capture Detection ◽

Extraction Column ◽

Rice Grain

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Gas Chromatographic Determination of Pesticide Residues in Malt, Spent Grains, Wort, and Beer with Electron Capture Detection and Mass Spectrometry

Journal of AOAC International ◽

10.1093/jaoac/90.2.544 ◽

2007 ◽

Vol 90 (2) ◽

pp. 544-549 ◽

Cited By ~ 16

Author(s):

Nuria Vela ◽

Gabriel Prez ◽

Gins Navarro ◽

Simn Navarro

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Electron Capture ◽

Pesticide Residues ◽

Chromatographic Determination ◽

Electron Capture Detection ◽

Selected Ion Monitoring ◽

Spent Grains ◽

Relative Standard

Abstract A method for the simultaneous determination of 9 pesticides (dinitroanilines, organophosphorus, triazoles, and pyrimidines) in several products (malt, spent grains, wort, and beer) of the beer industry is reported. Solid samples (malt and spent grains) are extracted by homogenization with a waterhexane mixture, and the pesticides are partitioned with dichloromethane. Liquid samples (wort and beer) are extracted by sonication with a hexanedichloromethane mixture. Determination of pesticide residues was made by capillary gas chromatography with an electron capture detector (ECD). Confirmation of the compounds was performed by gas chromatography/ion trap mass spectrometry in the selected ion monitoring mode. Detection limits for GCECD varied from 0.2 to 5.5 pg for trifluralin and malathion, respectively. Recoveries of the pesticides from spiked samples ranged from 81.2 to 113.7% with a relative standard deviation between 3.47.5%. The method presents good linearity over the studied range (0.0052 g/mL). The proposed method is rapid and reliable and can be useful for routine monitoring during brewing.

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